taxonID	type	description	language	source
840F8790F442E019FC57FB72FAB01DD6.taxon	description	(Figs 1; 13)	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F442E019FC57FB72FAB01DD6.taxon	materials_examined	TYPE MATERIAL EXAMINED. — Holotype (by monotypy). Guatemala • 1 ♀ (60.1: 40.5), dry; collecting data unknown; MNHN-IU- 2000 - 4025 (= MNHN-B 4025). OTHER MATERIAL EXAMINED. — Guatemala • 1 ♂ 4 ♀; Petén, Laguna de Petén, outlet; [16 ° 58 ’ 40.75 ” N, 89 ° 42 ’ 04.80 ” W; 113 m elev.]; 20. II. 1935; H. van der Schalie leg.; USNM 189301 • 1 juv. ♂ (17.3: 11.8) 4 ♀ (20.3: 14.4 - 32.6: 22.0); Petén, Lago Petén-Itzá, northern portion; 16 ° 59 ’ 48 ” N, 89 ° 42 ’ 10 ” W; 122 m. elev.; 14. I. 2014; I. S. Wehrtmann & M. Orozco leg.; UCR-MZ 3234 • 2 ♂, 2 ♀; Petén, Río Subín, Subín; 16 ° 38 ’ 14 ” N, 90 ° 10 ’ 59 ” W; 115 m. elev.; 15. I. 2014; I. S. Wehrtmann & M. Orozco leg.; UCR-MZ 3235 • 2 ♂ (33.2: 21.7; 41.5: 25.9), 1 ♀ (36.3: 24.0); Petén, Río Subín, Subín; 16 ° 38 ’ 14 ” N, 90 ° 10 ’ 59 ” W; 115 m. elev.; 15. I. 2014; I. S. Wehrtmann & M. Orozco leg.; INPA 2123 • 1 ♂ (36.5: 23.7) 2 ♀; Alta Verapaz, Río Chajmayic [= Chajmaic] [15 ° 45 ’ 05 ” N, 89 ° 56 ’ 45 ” W; 197 m elev.], about midway between Río San Simón and Celba; 14. IV. 1935; C. L. Huffs et al. leg.; USNM 230095.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F442E019FC57FB72FAB01DD6.taxon	distribution	DISTRIBUTION. — Guatemala (Alta Verapaz, Petén) (Pretzmann 1980, Wehrtmann et al. 2016; this study) (Fig. 13). OTHER RECORDS IN GUATEMALA. — Pretzmann (1980): Petén, Laguna Petén-Itzá, Flores [16 ° 55 ’ 39 ” N, 89 ° 54 ’ 10 ” W; 112 m elev.]; Petén, road to Belize, near Macanché [16 ° 57 ’ 39 ” N, 89 ° 38 ’ 02 ” W; 193 m elev.]; Petén, Mopan, at Río Melchor Mencos, border with Belize [17 ° 03 ’ 27 ” N, 89 ° 09 ’ 06 ” W; 92 m elev.].	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F442E019FC57FB72FAB01DD6.taxon	description	DESCRIPTION OF G 1 (Fig. 1 G-I) Stout, straight in both caudal, mesial views, moderately compressed mesolaterally; caudal margin nearly straight; lateral margin straight proximally, distinctly concave distally in mesial view; mesial surface with irregular rows of minute setae medially; caudal surface with elongated patch of caudal setae along proximal and median portions, setae longer proximally, decreasing in size medianly; mesocephalic surface with subdistal, elongated patch of setae slightly increasing in size distally. Spermatic channel distal opening on apex cavity, situated towards lateral end at base of caudal process. Marginal suture on mesial surface, straight along most of stem, regularly curved to lateral side distally in mesial view, proximal portion with row of large marginal setae. Marginal process subtriangular, erect, tip slightly rounded, as long as or slightly longer than caudal process in mesial and laterocephalic views, partially overlapping caudal process. Lateral suture incomplete, marked by somewhat deep sulcus on first 3 / 4 of caudal surface. Mesial process as strong subtriangular projection directed cephalad on distal portion of mesocephalic surface. Apex slightly distorted in cephalic direction; caudal process erect (not folded over apex cavity), largely projected distally, tip rounded in mesial, laterocephalic views. Apex cavity short; field of apical spines weakly developed, with few short, small spines slightly extended distally along half length of cephalic surface of caudal process. Cephalic process vestigial, reduced to two low protuberances subapically on cephalic surface at base of mesial process.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F442E019FC57FB72FAB01DD6.taxon	discussion	REMARKS The type locality of this species is unknown (H. Milne Edwards 1853). The holotype of Po. (Po.) nicaraguensis aequispinosus Pretzmann, 1971, a junior synonym of Po. armatus, is a female (NHMB 550 a – not examined) from an unknown locality in Guatemala. For the discussion of the taxonomic status and type locality issues regarding these taxa, see Rodríguez (1982: 120). The presumptive occurrence of this species in Mexico was based on specimens from Río Macuspana (Monte Cristo, municipality of Macuspana, state of Tabasco) identified by Rathbun (1905) and Rodríguez & Smalley (1972) as Po. armatus. Pretzmann (1975) used these specimens to describe Potamocarcinus (Po.) hartmanni Pretzmann, 1975. The last species was later recorded from other localities in Tabasco (Villalobos Hiriart & Álvarez 2008). Therefore, it seems reasonable to assume that Po. hartmanni has a northwestern distribution in rivers of the Gulf of Mexico drainage in the Mexican state of Tabasco, whereas Po. armatus is restricted more in the Southeast in rivers of both the Gulf of Mexico and Caribbean drainages in Guatemala and probable Belize as well.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F440E015FC3BFE11FEDA1EE7.taxon	description	(Figs 2; 13)	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F440E015FC3BFE11FEDA1EE7.taxon	materials_examined	TYPE MATERIAL EXAMINED. — Holotype. Guatemala • 1 ♂, holotype by monotypy of Potamocarcinus guatemalensis Rathbun, 1905; precise location unknown; M. Bocourt leg.; MNHN Entry 453 - 1883; MNHN-IU- 2017 - 8050 (= MNHN-B 5170). MATERIAL EXAMINED. — Guatemala • 1 ♂; collecting data unknown; UVGCR 506 • 1 ♂, collecting data unknown; UVGCR 508 • 1 ♂ (65.4: 41.6) 1 ♀ (64.9: 43.1); Guatemala, Amatitlán lake delta [14 ° 28 ’ 34 ” N, 90 ° 34 ’ 35 ” W; 1190 m elev.]; date and leg. unknown; FMNH 1830 • 3 ♂ (43.5: 29.0 - 81.3: -) 1 ♀ (damaged); Guatemala, Amatitlán market; date and leg. unknown; FMNH 1825 • 1 ♂ (82.0: 52.0); Guatemala, Lake Amatitlán [14 ° 29 ’ 12 ” N, 90 ° 36 ’ 38 ” W; 1190 m elev.]; 28. I- 3. II. 1906; S. E. Meek leg.; FMNH 1827, • 1 ♂ (74.5: 47.9); Guatemala, Lake Amatitlán [14 ° 29 ’ 12 ” N, 90 ° 36 ’ 38 ” W; 1190 m elev.]; 28. I- 03. II. 1906; S. E. Meek leg.; FMNH 1831 • 1 ♂ (56.8: 37.3); Guatemala, Lake Amatitlán; 26. VI. 1906; S. E. Meek leg.; FMNH 1828 • 3 ♂ (45.3: 30.0; 47.4: 32.0; 1 damaged) 1 ♀ (45.0: 30.4); Guatemala, Amatitlán [14 ° 29 ’ 12 ” N, 90 ° 36 ’ 40 ” W; 1190 m elev.], date and leg. unknown; FMNH 1832 • 1 immat. ♂; El Progreso, Río Morazán, near Morazán [14 ° 55 ’ 54 ” N, 90 ° 08 ’ 21 ” W; 349 m elev.], WNW of El Rancho, Motagua River basin; 8. V. 1947; Miller leg.; USNM 1089243 • 1 juv. ♂; Izabal, Río Ciénaga [15 ° 40 ’ 50 ” N, 88 ° 57 ’ 58 ” W; 13 m elev.], below bridge from road to Sarstún; 18. III. 1971; R. M. Boiley, R. C. & J. Lopez leg.; AMNH 8751 • 1 juv. ♂; Izabal, Río Ciénaga [15 ° 40 ’ 50 ” N, 88 ° 57 ’ 58 ” W; 13 m elev.], below bridge from road to Sarstún; 18. III. 1971; R. M. Boiley, R. C. & J. Lopez leg.; AMNH 16670 • 2 ♂ (51.7: 37.0; damaged) 1 ♀ (24.9: 17.2); Zacapa, Río Palmilla, near Usumatlán; 14 ° 58 ’ 30 ” N, 89 ° 45 ’ 45 ” W; [245 m elev.]; 21. VII. 2014; I. S. Wehrtmann & M. Orozco leg.; UCR-MZ uncat. • 1 ♂ (28.0: 19.5) 2 immat. ♀ (31.7: 21.7; 41.3: 27.9); Zacapa, Río El Jutillo, near Usumatlán; 14 ° 59 ’ 19 ” N, 89 ° 49 ’ 25 ” W; [347 m elev.]; 21. VII. 2014, I. S. Wehrtmann & M. Orozco leg.; UCR-MZ uncat. • 1 ♂; Suchitepéquez, Río Choyolate [= Coyolate] [14 ° 22 ’ 39.31 ” N, 91 ° 08 ’ 13.14 ” W; 255 m elev.], Patulul; 21. V. 1948; leg. unknown; USNM 189303 • 1 ♂; Solalá, Lago Atitlán [14 ° 42 ’ N, 91 ° 12 ’ W; 1558 m elev.]; 9. X. 1993; J. Zunyge leg.; UVGCR 96 • 1 ♂; Solalá, Lago Atitlán; 28. XI. 1993; leg. unknown; UVGCR 379 • 1 ♂; Solalá, Lago Atitlán; 6. XII. 1984; J. Montúfar leg.; UVGCR 65 • 1 ♂; Solalá, Lago Atitlán; 28. X. 1993; E. Pacay leg.; UVGCR 417 • 1 ♂ (70.0: 45.0); Solalá, Panajachel (bought in the market, captured at Lago Atitlán); VII. 2013; I. S. Wehrtmann leg.; UCR-MZ 3114 - 02 • 1 juv. ♂; Escuintla, carretera a Puerto Quetzal [13 ° 56 ’ N, 90 ° 47 ’ W; 8 m elev.]; 1. XI. 1993; C. Cardona leg.; UVGCR 319.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F440E015FC3BFE11FEDA1EE7.taxon	distribution	DISTRIBUTION. — Guatemala (El Progreso, Escuintla, Guatemala, Izabal, Solalá, Suchitepéquez, Zacapa) (Fig. 13), Mexico, Belize, Honduras, El Salvador, Costa Rica (Pretzmann 1980; Rodríguez 1982; Villalobos Hiriart & Álvarez 2008; Magalhães et al. 2015; Wehrtmann et al. 2016; this study). OTHER RECORDS IN GUATEMALA. — Rodríguez (1982): Escuintla, Aguna [? Río Aguná, 14 ° 15 ’ 05 ” N, 91 ° 07 ’ 26 ” W, 97 m elev.]. Pretzmann (1980): Solalá, Lake Atitlán; Zacapa, Rio Cayo, 7.3 miles W Estanzuela (128.8 km E Guatemala City) [15 ° 00 ’ N, 89 ° 34 ’ W, 190 m elev.]; Guatemala, 45 km E Guatemala City, Río Platanos [14 ° 50 ’ 42.25 ” N, 90 ° 24 ’ 12.67 ” W, 495 m elev.]; Izabal, 2 km S Mariscos [15 ° 24 ’ 54.53 ” N, 89 ° 04 ’ 43.86 ” W, 8 m elev.], Lake Izabal drainage; Izabal, Río Sena near Seno, 7 miles NW Livingston [15 ° 51 ’ 12 ” N, 88 ° 50 ’ 53 ” W, 7 m elev.]. The mention of the department of Jalapa in Wehrtmann et al. (2016) must be corrected to department of El Progreso since this is the correct location of the record referred to lot USNM 1089243.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F440E015FC3BFE11FEDA1EE7.taxon	description	DESCRIPTION OF G 1 (Fig. 2 C-F) Stout, straight in both caudal, mesial views, moderately compressed mesolaterally; caudal margin nearly straight in mesial view, with tuft of minute to short setae medially; lateral margin slightly concave distally in mesial view; caudal surface with sparce patch of caudal setae along median portion; mesocephalic surface with subdistal, elongated patch of setae increasing in size distally. Spermatic channel opening on apex cavity, situated towards lateral end at base of caudal process. Marginal suture on mesial surface, straight along most of stem, gently curved to lateral side distally in mesial view, with row of large marginal setae proximally. Marginal process broadly rounded, as long as caudal process in mesial view, partially overlapping this lobe on its lateral side. Lateral suture incomplete, marked by somewhat deep sulcus on first 3 / 4 of caudal surface. Mesial process as strong subtriangular projection directed cephalad on distal portion of mesial border. Apex moderately distorted in cephalic direction; caudal process enlarged, subquadrate in mesocaudal view, bearing slight protuberance on cephalic end, folded over the apex cavity, partially covering field of apical spines. Apex cavity oblong; field of apical spines moderately developed, rather narrow, with short, small spines. Cephalic process (lateral process, sensu Rodríguez & Hobbs 1989) bifid, with two distinct spiniform teeth apically, both pointing cephalad.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F440E015FC3BFE11FEDA1EE7.taxon	discussion	REMARKS The current geographic distribution of Po. magnus ranges from Mexico to Costa Rica, but some authors (Rodríguez 1982; Villalobos Hiriart & Álvarez 2008) observed morphological differences in the populations of this species inhabiting southern Mexico, Guatemala, and El Salvador from those occurring in Costa Rica. However, at least concerning the G 1 morphology, the specimen from Lake Atitlán (Fig. 2 E, F) is very much similar to the holotype specimen from Costa Rica illustrated by Magalhães et al. (2015: 331, figs 71, 72), except for the cephalic end of the caudal process, which has a distinct protuberance in the Guatemalan specimen whereas it is angled in the holotype. A more detailed study, including molecular analyses, of this group along its distributional area is needed to clarify this issue. The syntypes of Po. magnus are two males deposited at the USNM (USNM 19048 and 19049) from an unknown locality in Costa Rica. Magalhães et al. (2015) illustrated the G 1 of the male USNM 19049 and erroneously considered it as the holotype in the caption of the figures 71 and 72. The holotype of Potamocarcinus guatemalensis Rathbun, 1905, a junior synonym of Po. magnus, is a male (MNHN-IU- 2017 - 8050 [= MNHN-B 5170] (Fig. 2 A-D) from an unknown locality in Guatemala.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F44EE015FEBFF9B4FB351C66.taxon	description	(Figs 3 A-C; 14)	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F44EE015FEBFF9B4FB351C66.taxon	materials_examined	TYPE MATERIAL EXAMINED. — Holotype. Guatemala • 1 ♂ (41.1: 25.1); Sacatepéquez, river near Volcán de Aguas [14 ° 27 ’ 54 ” N, 90 ° 44 ’ 35 ” W]; 900 m elev.; date and leg. unknown; SMF 4354. OTHER MATERIAL EXAMINED. — Guatemala • 1 ♂ (25.8: 16.5); Guatemala, Mixco [14 ° 38 ’ N, 90 ° 36 ’ W; 1637 m elev.]; Finca La Esmeralda; 17. VIII. 1993; C. Cardona Gonzalez leg.; UVGCR 344.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F44EE015FEBFF9B4FB351C66.taxon	distribution	DISTRIBUTION. — Guatemala (Guatemala, Sacatepéquez) (Bott 1970; Wehrtmann et al. 2016; this study) (Fig. 14). The only two available records point to a distribution in the Pacific drainage of southern Guatemala.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F44EE015FEBFF9B4FB351C66.taxon	description	DESCRIPTION OF G 1 (Fig. 3 A-C) Stem moderately sinuous, moderatley compressed in caudocephalic direction, distal portion distinctly curved in laterocephalic direction, slightly wider subdistally; caudal margin, in mesial view, with strong median constriction and enlarged subdistal hump-like lobe, followed by irregular row of variable-sized spines; cephalic margin regularly convex medially in mesial view. Marginal suture on mesial surface, sinuous, gently following curvature of stem, with row of long and short setae along its proximal portion. Marginal process simple, nearly straight in mesial view, not overreaching apex. Lateral suture incomplete, marked by sulcus extending slightly beyond level of median constriction of caudal surface. Mesial process absent. Cephalic surface with cephalic process greatly developed as subdistal unilobed or faintly bilobed enlargement, directed basally and partially twisted towards mesial side, with row of minute spines along its proximal margin. Lateral process enlarged, tongue-shaped; distal margin rounded, situated subdistally on laterocephalic surface, somewhat curved towards cephalic side. Distal portion of lateral surface with distinct rounded (in cephalic view) spiny distolateral lobe. Apex open, oblong, elongated mesolaterally, directed cephalad; mesocaudal margin smooth, produced into small angled lobe, slightly more elevated in relation to laterocephalic margin. Field of apical spines moderately developed, elongated mesolaterally, with small spines.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F44EE015FEBFF9B4FB351C66.taxon	discussion	REMARKS When comparing the G 1 of both examined specimens, we noticed a small variation in the morphology of the cephalic process: in the holotype it is clearly unilobed, with its distal margin broadly rounded (Fig. 3 C), whereas in the male UVGCR 344 it seems to be faintly bilobed, with its distal margin bearing a slight median concavity.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F44FE017FF48F9D4FBAB1F64.taxon	description	(Figs 3 D-H; 14)	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F44FE017FF48F9D4FBAB1F64.taxon	materials_examined	MATERIAL EXAMINED. — Guatemala • 1 ♂ (30.6: 18.8); Escuintla, San José [13 ° 55 ’ 37.5 ” N, 90 ° 49 ’ 04.11 ” W; 6 m elev.]; 10. X. 1993; A. Kepfer leg.; UVGCR 328 • 2 ♂ (17.2: 11.6; 23.8: 16.1) 3 ♀ (13.7: 9.5; 13.8: 9.5; 16.2: 11.0); Suchitepéquez, Patutul, Finca Los Tarrales, stream inside the farm; 14 ° 31 ’ 28 ” N, 91 ° 08 ’ 07 ” W; 875 m elev.; 19. I. 2014; I. S. Wehrtmann, M. Orozco, C. Magalhães & M. W. Dix leg.; UCR-MZ 3231 - 01 • 2 ♂ (23.4: 15.5; 26.0: 16.5); Suchitepéquez, Patutul, Finca Los Tarrales, stream inside the farm; 14 ° 31 ’ 28 ” N, 91 ° 08 ’ 07 ” W; 875 m elev.; 19. I. 2014; I. S. Wehrtmann, M. Orozco, C. Magalhães & M. W. Dix leg.; INPA 2124 • 1 ♂ (19.6: 13.0) 1 ♀ (21.1: 13.6), dry; Guatemala, municipality of Fraijanes, aldea El Cerrito [14 ° 26 ’ N, 90 ° 27 ’ W; 1482 m elev.], quebrada La Escurana, tributary of Río Fraijanes; I. 2000; leg. unknown; INPA 2137 • 1 ♂ (26.4: 17.1), 1 ov. ♀ (26.6: 16.3); Santa Rosa, Renacimiento [? Renacimiento, on the Panamerican highway to El Salvador; 14 ° 15 ’ 24 ” N, 90 ° 16 ’ 13 ” W; 733 m elev.]; date unknown; R. Chea leg.; INPA 2474. COMPARATIVE MATERIAL EXAMINED. — Elsalvadoria zurstrasseni zurstrasseni (Bott, 1956): El Salvador • 1 ♂ (27.1: 17.1), holotype; La Liberdad, La Joya, road to Ciudad Arce, Chilamatal; 18. VIII. 1951; A. Zilch leg.; SMF 2449 • 1 ♂ (24.8: 16.6), paratype; El Salvador, Santa Ana, Laguna de Guija; 3. V. 1951; A. Zilch leg.; INPA 2142 (ex-SMF 2452). — Pseudothelphusa zurstrasseni arcuata Bott, 1956: El Salvador • 1 ♂ (21.1: 13.6), holotype, Morazán, Cacaguatique mountain near Osicala, Finca San Pedro; 13. IX. 1951; A. Zilch leg.; SMF 2443. — Pseudothelphusa zurstrasseni tridentata Bott, 1956: El Salvador • 1 ♂ (25.7: 15.7), holotype; Sonsonate, waterfall 2 km west from Juayua (Rio Santa Rita); 17. VII. 1951; A. Zilch leg.; SMF 2441.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F44FE017FF48F9D4FBAB1F64.taxon	distribution	DISTRIBUTION. — Guatemala (Escuintla, Guatemala, Santa Rosa, Suchitepéquez) (Smalley 1970; Wehrtmann et al. 2016; this study) (Fig. 14) and El Salvador (Bott 1956; Rodríguez 1982). The type locality is in El Salvador (La Liberdad, La Joya, road to Ciudad Arce, Chilamatal) (Bott 1956). Smalley (1970) mentioned the occurrence of this species in Guatemala but did not indicate any voucher specimen. Pretzmann (1972) probably just followed Smalley’s citation, as he has not examined any specimen from the country. Wehrtmann et al. (2016) recorded the species from the departments of Escuintla, Guatemala, and Suchitepéquez based on material collected during their surveys, but they did not list the specimens and their specific localities; this information is now provided herein.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F44FE017FF48F9D4FBAB1F64.taxon	description	DESCRIPTION OF G 1 (Fig. 3 D-H) Stem moderately sinuous, moderately compressed in caudocephalic direction, distal portion distinctly curved in laterocephalic direction, slightly wider subdistally; caudal margin, in mesial view, with strong median constriction and enlarged subdistal hump-like lobe, followed by irregular row of variable-sized spines; cephalic margin regularly convex medianly in mesial view. Marginal suture on mesial surface gently following the curvature of stem; row of long and short setae along proximal portion of marginal suture. Marginal process simple, slightly concave in mesial view, not overreaching apex. Lateral suture incomplete, marked by sulcus extending slightly beyond level of median constriction of caudal surface. Mesial process absent. Cephalic surface with cephalic process greatly developed as subdistal distinctly bilobed enlargment, directed basally and partially twisted towards mesial side, with irregular row of minute spines along its proximal margin. Lateral process as strong, three-dimensionally conical protuberance situated subdistally near base of cephalic process on laterocephalic surface, pointing towards lateral side. Distal portion of lateral surface without distinct distal spiny lobe; some specimens with subdistal small, rounded lateral lobe bearing minute spines situated obliquely slightly lower than subterminal spine. Apex open, oblong, elongated mesolaterally, directed cephalad; mesocaudal margin smooth, produced into rounded lobe, somewhat more elevated in relation to laterocephalic margin. Field of apical spines moderately developed, elongated mesolaterally, with small spines.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F44FE017FF48F9D4FBAB1F64.taxon	discussion	REMARKS The specimens examined by us, which include the type material of the nominal and subspecific forms described by Bott (1956), showed a certain amount of variation in the morphology of G 1, particularly in the shape of the cephalic process and in the presence or absence of the subdistal lobe of the lateral surface. At least in all Guatemalan specimens analyzed herein, the cephalic process is bilobed but can exhibit either: 1) nearly symmetrical rounded lobes separated by a slightly concave depression (e. g., INPA 2124 – Fig. 3 F); 2) nearly symmetrical sharp lobes separated by deep cleft (e. g., INPA 2474 – Fig. 3 G), which is similar to that of the holotype (SMF 2449 – Fig. 3 E); or, 3) asymmetrical sharp lobes also separated by deep cleft (e. g., INPA 2137 – Fig. 3 H). The morphology of the cephalic process is also variable in specimens from El Salvador, which led Bott (1956) to treat them as subspecies. Rodríguez (1982), in turn, considered it very possible that this is a normal variation for the species and treated them as synonyms. As for the subdistal lobe of the lateral surface, some (e. g., INPA 2124 – Fig. 3 F, 2137, 2474; UCR-MZ 3231 - 01) of the Guatemalan specimens show this lobe very clearly but it is absent in others (e. g., INPA 2137). However, it is not present in the holotype of the nominal species (Fig. 3 E) nor in the subspecies described by Bott (1956), although it is present in one of the paratypes of the nominal species (INPA 2142) from El Salvador (Santa Ana, Laguna de Guija). Such variability might suggest that we are dealing with a species complex and additional studies are required to resolve this question. For now, we prefer to maintain the concept adopted by Rodríguez (1982) and consider only one valid species until a more comprehensive study, including molecular analyses, can be conducted based on a more abundant series of specimens from the region.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F44CE016FC37FB55FBF11C81.taxon	description	(Figs 4 A-C; 15)	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F44CE016FC37FB55FBF11C81.taxon	materials_examined	TYPE MATERIAL EXAMINED. — Holotype. Guatemala • 1 ♂ (21.4: 12.3); USNM 126110, Alta Verapaz, Seamay Cave [15 ° 24 ’ 14 ” N, 89 ° 48 ’ 27 ” W; 929 m elev.], 1 km S of Senahú, about 200 km NE of Guatemala City; 10. II. 1968; G. Nicholas leg. OTHER MATERIAL EXAMINED. — Guatemala • 1 ♂ (25.6: 15.5); Zacapa, Santa Clara [? Finca Santa Clara: 15 ° 07 ’ N, 89 ° 49 ’ W; 1346 m elev.]; 7. VIII. 1948; R. D. Michell leg.; FMNH 12210 • 1 ♂; Alta Verapaz, Seamay Cave, near Senahú; 3. I. 1973; M. Frania leg.; USNM 189299 • 2 ♂, 2 ♀; Alta Verapaz, Senahú, Finca Seamay, Cueva Seamay [15 ° 24 ’ 14 ” N, 89 ° 48 ’ 27 ” W; 929 m elev.]; 24 - 26. VIII. 1969; S. & J. Peck leg.; USNM 128408 • 1 ♂ (19.0: 11.0), 1 ♀ (23.2: 13.8); Alta Verapaz, Senahú, Finca Seamay, Cueva Seamay [15 ° 24 ’ 14 ” N, 89 ° 48 ’ 27 ” W; 929 m elev.]; 24 - 26. VIII. 1969; S. & J. Peck leg.; INPA 2182 • 1 ♂ (21.8: 13.1); Alta Verapaz, in the surroundings of San Juan Chamelco [15 ° 26 ’ 09 ” N, 90 ° 20 ’ 17 ” W; 1375 m elev.], Río Chilax; 1975; Büttger leg.; SMF 8867 • 1 ♂ (22.9: 13.4) 2 ♀ (23.7: 13.8; 25.4: 14.3); Baja Verapaz, ruta 5 (antigua carretera a Salamá), Río Quilila (tributary to Río Negro or Chixoy); 15 ° 12 ’ 53 ” N, 90 ° 17 ’ 39 ” W; 1305 m elev.; 21. I. 2014; I. S. Wehrtmann, M. Orozco, C. Magalhães & M. W. Dix leg.; UCR-MZ 3766 - 01 • 1 ♂ (13.7: 8.5) 1 ♀ (16.9: 10.5); Baja Verapaz, ruta 5 (antigua carretera a Salamá), Río Quililá (tributary to Río Negro or Chixoy); 15 ° 12 ’ 53 ” N, 90 ° 17 ’ 39 ” W; 1305 m elev.; 20. VII. 2014; I. S. Wehrtmann & M. Orozco leg.; INPA 2473 • 1 ♂ (28.8: 16.5); Baja Verapaz, tributary of Río Negro, approximately 18 miles north of Salamá, on road to Cobán [15 ° 11 ’ 24 ” N, 90 ° 17 ’ 40 ” W, 1382 m elev.], 22. IV. 1947, Miller & Holoway leg.; INPA 2181 • 2 ♂; Baja Verapaz, tributary of Río Negro, approximately 18 miles north of Salamá, on road to Cobán [15 ° 11 ’ 24 ” N, 90 ° 17 ’ 40 ” W, 1382 m elev.], 22. IV. 1947, Miller & Holoway leg.; USNM uncat.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F44CE016FC37FB55FBF11C81.taxon	distribution	DISTRIBUTION. — Guatemala (Alta Verapaz, Baja Verapaz, Zacapa) (Smalley 1970; Rodríguez 1982; Wehrtmann et al. 2016; this study) (Fig. 15) and Mexico (Magalhães & Wehrtmann 2025).	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F44CE016FC37FB55FBF11C81.taxon	description	DESCRIPTION OF G 1 (Fig. 4 A-C) Stem moderately sinuous, distal portion slightly curved in laterocephalic direction, compressed in caudocephalic direction, approximately the same width along the entire stem in mesocaudal view; caudal margin, in mesocaudal view, concave, sometimes with slight median discontinuity due to barely noticiable angled or rounded smooth lateral lobe; cephalic margin regularly convex in mesocaudal view. Marginal suture on mesial surface gently following the curvature of the stem, distinctly curved towards lateral side distally in mesial view; row of long and short setae along proximal portion of marginal suture. Marginal process wide, broadly rounded in mesocaudal view, not overreaching mesocaudal margin of apex. Lateral suture incomplete, marked by sulcus along first 3 / 4 of caudal surface, shallower distally. Mesial process as subtriangular conical spine at base of supra-apical process, directed cephalad. Cephalic process absent. Mesial surface produced into variable-length, rounded supra-apical process densely covered with short spines along its regularly widened margins; patch of spines denser distally. Supra-apical process with cephalic surface distinctly folded proximally, concave medianly; mesocaudal surface smooth, slightly concave. Supra-apical process with variable length ranging approximately from 0.2 to 0.5 times G 1 ’ s length in mesocaudal view, also ranging from slightly wider than long (ratio width / length roughly 1.2) to longer than wide (ratio width / length roughly 0.6); tip rounded. Apex oblong, elongated mesolaterally, directed cephalad; lower margin smooth (finely crenulated in some paratypes), upper margin (basal portion of supra-apical process) smooth. Field of apical spines poorly developed, narrow, elongated mesolaterally, with minute spines.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F44CE016FC37FB55FBF11C81.taxon	discussion	REMARKS The number of male specimens assigned to Ph. acanthophallus available in the collections revised by us is somewhat low (see above). Nevertheless, one can notice some degree of variability in their G 1 s, particularly in the size of the supra-apical process. This process can be relatively short (roughly 1 / 5 the G 1 ’ s length) and wider than long (ratio width / length roughly 1.2) as in the male INPA 2181 from Baja Verapaz, 18 miles north of Salamá (Fig. 4 B), moderately long (roughly 1 / 3 the G 1 ’ s length) and nearly as wide as long (ratio width / length roughly 0.9) as in the male USNM 1180974 from Chiapas, Mexico (cw 24.3 mm; see fig. 1 A in Magalhães & Wehrtmann 2025), or longer than wide (ratio width / length roughly 0.6) and quite long (nearly half of the G 1 ’ s length) as in male SMF 8867 (Fig. 4 A) from Alta Verapaz, río Chilax. In the holotype, the supra-apical process is slightly longer than wide (ratio width / length roughly 0.8) and about 1 / 3 the G 1 ’ s length (see Smalley, 1970: 100, fig. 18). Interestingly, the G 1 with the shorter supra-apical process belongs to the largest specimen examined (cw 28.8: male, INPA 2181) whereas the G 1 with the longest supra-apical process belongs to a smaller specimen (cw 21.8: male, SMF 8867); this latter specimen, however, is similar in size to the holotype (cw 21.4), which has a supra-apical process of intermediate size. It remains to be seen, pending the availability of a larger sample, whether this variability in terms of a negative allometry is related to age. Despite the variability of the supra-apical process, the G 1 of all specimens examined herein share a unilobed mesial process in the form of a distinctly conical and acute spine (Fig. 4 A, B) and were, therefore, considered to be co-specific. However, the observed variability of the G 1 might be indicative of the existence of a species complex (see also Remarks for Pseudothelphusa proxima Rathbun, 1905, below). A better understanding of this situation should wait until a more abundant series of specimens from the species’ distributional range becomes available.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F44AE010FF5DFA54FEEC1D67.taxon	description	(Figs 4 D, E; 15)	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F44AE010FF5DFA54FEEC1D67.taxon	materials_examined	TYPE MATERIAL EXAMINED. — Holotype. Guatemala • 1 ♂ (19.9: 12.2); Baja Verapaz, stream near summit of Sierra de Chuacús, 96 km by highway north of Guatemala City; 15 ° 00 ’ N, 90 ° 26 ’ W; [2029 m elev.] (see Remarks); 19. VIII. 1967; A. E. & I. C. Smalley leg.; USNM 126113. Paratypes. Guatemala • 4 ♂ 6 ♀; data as in holotype; USNM 126114 • 1 ♂; data as in holotype; TMNH 6090,	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F44AE010FF5DFA54FEEC1D67.taxon	distribution	DISTRIBUTION. — Guatemala (Baja Verapaz) (Smalley 1970) (Fig. 15).	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F44AE010FF5DFA54FEEC1D67.taxon	description	DESCRIPTION OF G 1 (Fig. 4 D, E) Stem moderately sinuous; distal portion markedly curved in laterocephalic direction, compressed in caudocephalic direction, approximately the same width along entire stem in mesocaudal view; caudal margin medianly concave in mesocaudal view, lateral lobe indistinct; cephalic margin slightly convex medianly in mesocaudal view. Marginal plate fused subdistally to caudal surface. Marginal suture on mesial surface, gently following the curvature of the stem, distinctly curved towards lateral side distally in mesial view; row of long and short setae along proximal portion of marginal suture. Marginal process wide, broadly rounded in mesocaudal view, not overreaching mesocaudal margin of apex. Lateral suture incomplete, marked by sulcus along first 3 / 4 of caudal surface, shallower distally. Mesial process unilobed, broadly subtriangular, directed cephalad. Cephalic process absent. Mesial surface produced into large roughly subtriangular supra-apical process covered with short spines along cephalic, caudal margins and distal portion of laterocephalic surface; patch of spines denser along median portion of cephalic and caudal margins. Supra-apical process with caudal margin moderately widened proximally; cephalic surface barely folded proximally, concave medianly; mesocaudal surface smooth, slightly concave. Supra-apical process slightly longer than wide (ratio width / length roughly 0.8), approximately 0.4 times length of entire stem in mesocaudal view; tip subtriangular, distinctly narrower than median portion. Apex narrow, slit-like and elongated mesolaterally, directed cephalad; lower margin smooth (finely crenulated in some paratypes), upper margin (basal portion of supra-apical process) smooth. Field of apical spines poorly developed, narrow, elongated mesolaterally, directed cephalad, with minute spines nearly concealed by basal portion of supra-apical process and distal margin of cephalic surface of G 1.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F44AE010FF5DFA54FEEC1D67.taxon	discussion	REMARKS This species is only known from its type locality in the Sierra de Chuacús, department of Baja Verapaz, Guatemala. The types and only specimens available were collected by A. E. Smalley himself and he stated that the type locality (“ stream near summit of Sierra de Chuacús ”) would be “ 96 km by highway north of Guatemala City ” at 15 ° 00 ’ N, 90 ° 26 ’ W. These coordinates, however, must be a mistake because, when plotted in a map (Google Earth ®, for instance) they do not match the textual information regarding the distance by road from Guatemala City, since these coordinates are placed both far from any road coming from Guatemala City and approximatelly 30 km SE from Sierra de Chuacús. In an attempt to obtain a roughly approximate location based on Smalley’s (1970) textual information by plotting the road distance (96 km) along the highway from Guatemala City towards the Sierra de Chuacús in Google Earth ®, the site could be located around the coordinates 15 ° 10 ’ 03.45 ” N, 90 ° 36 ’ 27.46 ” W, 828 m elev., which is more or less in line with information reported by the author. Following a preliminary study of the material deposited at the UVGCR, Wehrtmann et al. (2016) listed the species as also occurring in the department of Zacapa. A more detailed examination of the male of lot UVGCR 348 for this study, however, showed that it actually belongs to Ph. ibarrai (Pretzmann, 1978) because of the subtriangular and bifid mesial lobe of the G 1.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F44BE013FF5FF994FE881805.taxon	description	(Figs 4 F-I; 15)	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F44BE013FF5FF994FE881805.taxon	materials_examined	TYPE MATERIAL EXAMINED. — Holotype. Guatemala • 1 ♂ (25.7: 16.5); Guatemala, 14 km south of Guatemala City, north of San José Pinula; [14 ° 33 ’ N, 90 ° 25 ’ W]; 1800 m elev.; 20. IV. 1975; Dr I. Poglayen-Neuwall leg. through Germán Ibarra; NHMW 4065. OTHER MATERIAL EXAMINED. — Guatemala • 1 ♂; collecting data unknown; UVGCR 441 • 1 ♂ (31.4: 18.7) 2 ♀ (18.1: 9.9; 38.1: 20.0); Baja Verapaz, ruta 5 (antigua carretera a Salamá), Río Quililá (tributary to Río Negro or Chixoy); 15 ° 12 ’ 53 ” N, 90 ° 17 ’ 39 ” W; 1305 m elev.; 20. VII. 2014; I. S. Wehrtmann & M. Orozco leg.; UCR-MZ uncat. • 1 ♂; Zacapa, Río Hondo, Aldea San Lorenzo [15 ° 07 ’ N, 89 ° 38 ’ W], municipality Río Hondo, Sierra de Las Minas; 1800 m elev.; 7. XI. 1986; leg. unknown; UVGCR 348.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F44BE013FF5FF994FE881805.taxon	distribution	DISTRIBUTION. — Guatemala (Alta Verapaz, Guatemala, Zacapa) (Pretzmann 1978; Rodríguez 2001; Wehrtmann et al. 2016; this study) (Fig. 15). OTHER RECORDS IN GUATEMALA. — Rodríguez (2001): department of Guatemala, km 30 on road from San José Pinula [14 ° 32 ’ 00.66 ” N, 90 ° 23 ’ 09.32 ” W; 1735 m elev.] to Mataquesquintla.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F44BE013FF5FF994FE881805.taxon	description	DESCRIPTION OF G 1 (Fig. 4 F-I) Stem moderately sinuous, distal portion markedly curved in laterocephalic direction, compressed in caudocephalic direction, approximately the same width along the entire stem in mesocaudal view; caudal margin, in mesocaudal view, concave, lateral lobe indistinct; cephalic margin convex in mesocaudal view. Marginal plate fused subdistally to caudal surface. Marginal suture on mesial surface gently following the curvature of the stem, distinctly curved towards lateral side distally in mesial view; row of long setae along proximal portion of marginal suture. Marginal process wide, broadly rounded in mesocaudal view, not overreaching mesocaudal margin of apex. Lateral suture incomplete, marked by sulcus along first 3 / 4 of caudal surface, shallower distally. Mesial process asymmetrically bilobed, larger lobe rounded, at base of supra-apical process, directed cephalad. Cephalic process absent. Mesial surface produced into a rounded supra-apical process densely covered with short spines along its widened margins, patch of spines denser distally. Supra-apical process with cephalic surface distinctly folded proximally, concave medianly; mesocaudal surface smooth, slightly concave. Supra-apical process relatively short, length ranging approximately from 0.2 to 0.3 times G 1 ’ s length in mesocaudal view, nearly as long as wide (ratio width / length roughly 1.0 to 1.3); tip rounded. Apex oblong, elongated mesolaterally, directed cephalad. Field of apical spines poorly developed, narrow, elongated mesolaterally, with minute spines.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F44BE013FF5FF994FE881805.taxon	discussion	REMARKS Phrygiopilus ibarrai is morphologically very similar to Ph. acanthophallus and their currently known distributions partially overlap in the departments of Baja Verapaz and Zacapa. They are mainly distinguished by the morphology of the G 1 ’ s mesial process, which is bilobed and sometimes rounded in Ph. ibarrai (Fig. 4 F, H, I) vs unilobed and acute in Ph. acanthophallus (Fig. 4 A-C). In Ph. ibarrai, the length of the supra-apical process tends to be shorter than in Ph. acanthophallus, but this process was also relatively short in a few specimens of Ph. acanthophallus examined by us (e. g., male INPA 2181 – Fig. 4 C). Whether these taxa represent a species complex remains to be better evaluated when a larger series of specimens is available from their distributional area. The difference in the mesial process (bilobed, rounded in Ph. ibarrai vs unilobed, acute in Ph. acanthophallus) seems to be consistent but, curiously, specimens of both species were collected by one of us (ISW) in the same location and date (Río Quilila, a tributary to Río Negro or Chixoy, department of Baja Verapaz, near the bridge of the “ ruta 5 ”, the old road to Salamá, 15 ° 12 ’ 53 ” N, 90 ° 17 ’ 39 ” W, 20. VII. 2014): whereas the male from INPA 2473 was determined as Ph. acanthophallus, that of the lot UCR-MZ uncat., is determined as Ph. ibarrai. The species could perhaps be part of the species complex that includes Ph. acanthophallus. It is important to note that Pretzmann (1980: 659) mixed up the captions of the illustration for this species with those for Potamocarcinus (Zilchia) zilchi germani (see Pretzmann 1980: 658). The correct information for Isabellagordonia (Phrygiopilus) acanthophalla ibarrai in Pretzmann (1980: 659) should be: “ plate 9 figs 37 - 41, plate 18 fig. 80 ” (CM, pers. observation).	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F448E013FF6FFC72FB7F1F65.taxon	description	(Figs 4 J, K; 15)	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F448E013FF6FFC72FB7F1F65.taxon	materials_examined	TYPE MATERIAL EXAMINED. — Holotype. Guatemala • 1 ♂ (23.4: 14.1); Alta Verapaz, Cacao, Trace [= Trece] Aguas [probably Finca Trece Aguas, Hidroelectrica Secacao, at 15 ° 24 ’ 35.27 ” N, 89 ° 46 ’ 45.63 ” W; 805 m elev. – see Remarks]; VI. 1907; G. P. Goll leg.; USNM 79372.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F448E013FF6FFC72FB7F1F65.taxon	distribution	DISTRIBUTION. — Guatemala (Alta Verapaz) (Pretzmann 1965) (Fig. 15).	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F448E013FF6FFC72FB7F1F65.taxon	description	DESCRIPTION OF G 1 (Fig. 4 J, K) Stem markedly sinuous, distal portion noticeable curved in laterocephalic direction, compressed in caudocephalic direction, wider proximally in mesocaudal view; caudal margin, in mesocaudal view, with clear median discontinuity due to distinct rounded lateral lobe bearing minute setae better seen in caudal view; cephalic margin slightly convex medianly in mesocaudal view. Marginal plate fused subdistally to the caudal surface; irregular row of short setae longitudinally along proximal half of marginal plate. Marginal suture on mesial surface gently following the curvature of the stem, distinctly curved towards lateral side distally in mesial view; row of long and short setae along proximal portion of marginal suture. Marginal process wide, broadly rounded in mesocaudal view, not overreaching mesocaudal margin of apex. Lateral suture incomplete, marked by sulcus along first 3 / 4 of caudal surface, shallower distally. Mesial process absent. Cephalic surface weakly crenulate distally, cephalic process absent; mesial surface produced into large, rounded supra-apical process. Supra-apical process with laterocephalic surface bearing spines larger and more compacted towards cephalic side and along caudodistal margin, lateral margin nearly smooth; cephalic surface not folded proximally, slightly convex in caudocephalic direction medianly; mesocaudal surface smooth, distinctly concave. Supra-apical process slightly wider than long (ratio width / length roughly 1.2), approximately 0.2 times length of entire stem in mesocaudal view; tip rounded. Apex narrow, elongated mesolaterally, directed cephalad, lower margin finely crenulated, upper margin (basal portion of supra-apical process) wringled. Field of apical spines poorly developed, narrow, elongated mesolaterally, with minute spines.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F448E013FF6FFC72FB7F1F65.taxon	discussion	REMARKS This species is only known from the type locality. Reddell (1981: 317) supposed that “ Cacao, Trece Aguas ” was probably in the Seamay-Sejul karstik system, department of Alta Verapaz, but Caudell (1908) explained that “ Cacao is situated in the Province of Alta Vera Paz, between Panzos and Senahú, at an altitude of about 900 feet, near the foot of the waterfalls, above which the coffee plantation of Trece Aguas is situated ”. According to Google Earth ®, “ Cacao, Trece Aguas ” most likely refers to the Trece Aguas farm, Secacao hydroelectric dam, Senahú, department of Alta Verapaz.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F448E00DFC63FB92FC151C81.taxon	description	(Figs 5; 15) urn: lsid: zoobank. org: act: 4885342 C-FE 1 E- 463 A-AC 6 E- 0021767 D 0726	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F448E00DFC63FB92FC151C81.taxon	materials_examined	TYPE MATERIAL. — Holotype. Guatemala • ♂ (27.0: 15.8), Escuintla, specific locality unknown; 3. XI. 2000; R. Hernández leg.; UVGCR 31.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F448E00DFC63FB92FC151C81.taxon	diagnosis	DIAGNOSIS. — G 1 markedly sinuous, distal portion strongly curved in laterocephalic direction; caudal margin, in mesocaudal view, with clear median discontinuity due to distinct angled lateral lobe bearing minute setae. Mesial process as subtriangular conical spine at base of supra-apical process, directed cephalically. Supra-apical process with its margins and all over laterocephalic surface regularly and densely covered with spines (smaller proximally); mesial surface smooth, somewhat concave; supra-apical process slightly wider than long (ratio width / length roughly 1.2), approximately 0.2 times length of entire stem in mesocaudal view.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F448E00DFC63FB92FC151C81.taxon	etymology	ETYMOLOGY. — The specific epithet “ senticosus ”, from Latin, means thorny, an adjective that refers to the densely spined supra-apical process of the male first gonopod.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F448E00DFC63FB92FC151C81.taxon	distribution	DISTRIBUTION. — Guatemala (Escuintla - the distribution record in the Fig. 15 is arbitrarily represented in the center of the department: approximately 14 ° 10 ’ N, 91 ° 00 ’ W).	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F448E00DFC63FB92FC151C81.taxon	description	DESCRIPTION OF THE HOLOTYPE Carapace (Fig. 5 A) outline ellipsoid, widest at the middle (cw / cl 1.70), dorsal surface smooth, nearly flat, regions ill-defined. Two distinct gastric pits, close to each other, on metagastric region. Cervical grooves somewhat deep, wide, slightly arched, distal end failing to reach anterolateral margin. Postfrontal lobules small, almost indistinct; median groove shallow. Surface of carapace between front and postfrontal lobules smooth, distinctly deflected anteroventrally. Front (Fig. 5 C, D) with upper border smooth, rounded, median notch absent; lower border carinate, slightly sinuous in dorsal and frontal views, slightly more projected anteriorly than upper one. Upper orbital margin (Fig. 5 D) lined with faint papillae; lower orbital margin crenulate, lined with faint papillae; exorbital angle very low, obtuse. Anterolateral margin of carapace with set of faint, minute, rounded teeth increasing in size from anterior to posterior portion; posterolateral margin smooth, marked by faint suture. Epistome (Fig. 5 C, D) narrow longitudinally; epistomial tooth low, slightly deflected anteroventraly, with carinate, smooth borders. Suborbital and subhepatic regions of carapace sidewall (Fig. 5 C, D) smooth; pterygostomial regions (Fig. 5 C) weakly pilose. Endopod of Mxp 3 (Fig. 5 C) with ischium subquadrate, its outer and inner margins nearly straight; merus with outer margin broadly rounded, inner surface of palp bearing short and long setae; exopod of third maxiliped long, narrow, 0.73 times length of outer margin of ischium. Aperture of efferent branchial channel (Fig. 5 D) wide, subretangular, upper margin slightly rounded, smooth. Chelipeds (Fig. 5 A, B) strongly heterochelous, similarly armed, right P 1 larger. Larger cheliped (Fig. 5 E) with merus subtriangular in cross section; dorsal margin rounded, with irregular row of low tubercles, fainter distally; ventromesial margin lined by longitudinal row of conical tubercles increasing in size distally; ventrolateral margin with single row of faint tubercles; distal upper margin arched, smooth; lower margin with subdistal row of faint tubercles. Carpus with inner margin bearing row of faint tubercles, a prominent median spine, and smooth distally; outer surface rounded, smooth. Palm (Fig. 5 E) swollen (length / width 1.78), smooth on both mesial and lateral surfaces, ventral margin with irregular row of very faint tubercles. Fingers of larger chela (Fig. 5 A, B, E) slightly gaping, those of smaller chela not gaping, tips not crossing; pollex with three subtriangular, large teeth interspaced with smaller ones. Dactylus of larger chela moderately arched, approximately as long as palm (dactylus / palm 1.054, measured dorsally); dorsal, mesial and lateral surfaces of dactylus and pollex with longitudinal rows of faint papillae. Ambulatory legs (Fig. 5 A, B) mostly disarticulated or broken; P 5 still attached to body, slender, ratios dactylus / propodus and dactylus / merus 1.40 and 0.79, respectively; P 5 with dactylus bearing five longitudinal rows of sharp, corneous spines, increasing in size distally. Thoracic sternum approximately as longer as broad (Fig. 5 B). Thoracic sternites of 3 rd maxillipeds and chelipeds completely fused, except for small notches at lateral edges of sternum. Male sternopleonal cavity densely pilose. Episternites 4 - 6 triangluar posteriorly, episternite 7 posteriorly truncate. Penis somewhat long and slender, hook-shaped, emerging from nearby coxo-sternal condyle articulation of P 5 coxa, located proximally on sternite 8. All pleonal somites free (Fig. 5 B); lateral margins of somites fringed by line of short setae; male pleon with somite VI trapezoidal, longest, slightly shorter than telson (ration length of telson / length somite VI = 0.92), lateral margins slightly concave. Male telson (Fig. 5 B) subtriangular, as long as wide, approximately as long as pleonal somite VI, lateral margins nearly straight, fringed by line of short seate, tip rounded. G 1 (Fig. 5 F-H) markedly sinuous, distal portion noticeable curved in laterocephalic direction, compressed in caudocephalic direction, wider proximally in mesocaudal view; caudal margin, in mesocaudal view, with clear median discontinuity due to distinct angled lateral lobe bearing minute setae; cephalic margin broadly convex medianly in mesocaudal view; mesial surface with irregular row of short setae longitudinally along proximal half. Marginal suture on mesial surface, gently following the curvature of the stem, distinctly curved towards lateral side distally in mesial view; row of long and short setae along proximal portion of marginal suture. Marginal process wide, broadly rounded in mesocaudal view, not overreaching mesocaudal margin of apex. Lateral suture incomplete, marked by sulcus along first 2 / 3 of caudal surface, shallower distally. Mesial process as subtriangular conical spine at base of supra-apical process, directed cephalad. Cephalic surface distally and subdistally crenulate, cephalic process absent; mesial surface produced into large, suboval supra-apical process. Supra-apical process with its margins, and all over laterocephalic surface, regularly and densely covered with spines (smaller proximally); cephalic surface distinctly folded proximally, slightly convex in caudocephalic direction medianly; mesocaudal surface smooth, distinctly concave. Supra-apical process slightly wider than long (ratio width / length roughly 1.2), approximately 0.2 length of entire stem in mesocaudal view; tip rounded. Apex narrow, slit-like, elongated mesolaterally, directed cephalad, upper and lower margins finely crenulated. Field of apical spines poorly developed, narrow, elongated mesolaterally, with minute spines nearly concealed by basal portion of supra-apical process and distal margin of cephalic surface of G 1. G 2 slightly shorter than G 1, flagellum very slender, regularly tapering, tip flattened.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F448E00DFC63FB92FC151C81.taxon	discussion	REMARKS In terms of the G 1 morphology, Ph. senticosus n. sp. is most similar to Ph. strengerae, since their gonopods are strongly recurved cephalically and bear a strong median lobe due to a remarkable discontinuity on the median portion of the caudal margin (better seen in mesocaudal view). However, the following characters can readily distinguish both species: (a) the lateral lobe is less pronounced in Ph. senticosus n. sp., being shorter than the marginal process in mesocaudal view (Fig. 5 F), whereas this lobe is distinctly more pronounced in Ph. strengerae, being nearly as wide as the marginal process in mesocaudal view (Fig. 4 J); (b) the width of the stem median constriction is wider in Ph. senticosus n. sp. (ratio width at constriction / width at lateral lobe roughly 0.7 – measured in mesocaudal view) (Fig. 5 F) than in Ph. strengerae (ratio width at constriction / width at lateral lobe roughly 0.4 – measured in mesocaudal view) (Fig. 4 J); (c) the mesial process is present in Ph. senticosus n. sp. (Fig. 5 F) as a conical spine whereas it is absent in Ph. strengerae (Fig. 4 J); (d) the supra-apical process, particularly towards the mesocaudal surface, is more densely thorny in Ph. senticosus n. sp. (Fig. 5 FH) than in Ph. strengerae (Fig. 4 J, K). Additionally, Ph. senticosus n. sp. is distributed in southern Guatemala (department of Escuintla), while Ph. strengerae occurs in the department of Alta Verapaz, in central-northern Guatemala. The new species can be easily differentiated from the other Guatemalan species of Phrygiopilus by the strong lateral lobe and by the cephalic surface of the supra-apical process densely thorny.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F457E008FF64FED0FAF31A1B.taxon	description	(Figs 6 A-C; 7; 16)	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F457E008FF64FED0FAF31A1B.taxon	materials_examined	TYPE MATERIAL EXAMINED. — Lectotype (by inference of “ type ” by Rathbun 1905: 294, 295). Guatemala • 1 ♀ (damaged, 76.5: 48.5 according to Rodríguez 1982), dry; Alta Verapaz, environs de Cobán [15 ° 27 ’ 55.74 ” N, 90 ° 22 ’ 20.10 ” W; 1303 m elev.]; M. Bocourt leg.; Expédition du Mexique, 1864 - 1866; MNHN Entry 190 - 1866; MNHN-IU- 2000 - 4052 (= MNHN-B 22814). Paralectotype (by inference of “ cotype ” by Rathbun 1905: 295). Guatemala • 1 ♀ (cw 74.3 mm × cl 48.4 mm, according to Rodríguez 1982), dry; Alta Verapaz, environs de Cobán [15 ° 27 ’ 55.74 ” N, 90 ° 22 ’ 20.10 ” W; 1303 m elev.]; M. Bocourt leg.; Expédition du Mexique, 1864 - 1866; MNHN-IU- 2000 - 4626 (= MNHN-B 22814). Holotype of Pseudothelphusa cobanensis Rathbun, 1905 (by original designation). Guatemala • 1 ♀ (62.5: 40.5), dry,; Alta Verapaz, environs de Cobán; M. Bocourt leg.; Expédition du Mexique, 1864 - 1866; MNHN Entry 190 - 1866; MNHN-IU- 2000 - 4625 (= MNHN-B 4625, ex B 4053). Paratype of Pseudothelphusa cobanensis Rathbun, 1905. Guatemala • 1 ♂ (carapace damaged), dry,; Alta Verapaz, environs de Cobán; date unknown; M. Bocourt leg.; Expédition du Mexique, 1864 - 1866; MNHN-IU- 2000 - 4628 (= MNHN-B 4628, ex B 4053). Holotype of Pseudothelphusa similis Rathbun, 1905. Guatemala • 1 ♂ (70.2: 42.5), dry; Alta Verapaz, rivière de Pansos-Palochie [= Polochic river, municipality of Panzós; 15 ° 23 ’ 20.74 ” N, 89 ° 37 ’ 30.23 ” W; 10 m elev.]; XII. 1865; M. Bocourt leg.; Expédition du Mexique, 1864 - 1866; MNHN Entry 190 - 1866; MNHN-IU- 2000 - 4624 (= MNHN-B 4624, ex-B 4058). Holotype of Pseudothelphusa grallator Rathbun, 1905 (by original designation. Guatemala • 1 ♀ (61.3: 38.9), dry, Totonicapán, montagnes des Altos, environs de Totonecapan [? San Francisco El Alto; 14 ° 55 ’ 53.07 ” N, 91 ° 26 ’ 42.10 ” W; 2351 m elev.], surrondings of Totonicapán]; M. Bocourt leg.; Expédition du Mexique, 1864 - 1866; MNHN-IU- 2000 - 4627 (= MNHN-B 4627, ex B 4055). Paratypes of Pseudothelphusa grallator Rathbun, 1905. Guatemala • 1 ♀, dry, 1 ♂ (remnants), dry; same data as in type; MNHN-IU- 2000 - 4055 (= MNHN-B 4627). OTHER MATERIAL EXAMINED. — Guatemala • 1 ♂; collecting data unknown; UVGCR 46 • 1 ♂; collecting data unknown; UVGCR 209 • 1 ♂, UVGCR 510, collecting data unknown; 1 ♂; Costa Sur; 28. X. 1993; K. Ness M. leg.; UVGCR 97 • 1 ♂, Costa Sur; XI. 1993; C. Cardona leg.; UVGCR 367 • 1 juv. ♂ (24.5: 16.6); Petén, Poptún, Finca Ixobel, cerca a riachuelo; 16 ° 18 ’ 14 ” N, 89 ° 25 ’ 13 ” W; [537 m elev.]; 11. I. 2014; I. S. Wehrtmann & M. Orozco leg.; UCR-MZ 3236 - 01 • 2 juv. ♂ (12.4: 8.6; 19.8: 13.3); Petén, Dolores, Río Sanicté; 16 ° 36 ’ 55 ” N, 89 ° 32 ’ 37 ” W; 270 m elev.; 12.01.2014; I. S. Wehrtmann & M. Orozco leg. UCR-MZ 3233 • 1 juv. ♂ (21.8: 14.5) 1 juv. ♀; Quiché, Sacapulas, quebrada El Tesoro, Pacan, 15 ° 18 ’ 11 ” N, 91 ° 04 ’ 49 ” W; 1954 m elev.; 20. I. 2014; I. S. Wehrtmann, M. Orozco, C. Magalhães & M. W. Dix leg.; UCR-MZ 3232 - 01 • 2 ♂ spec., Alta Verapaz, Río Chilax, in the surroundings of San Juan Chamelco; [15 ° 26 ’ 15.30 ” N, 90 ° 20 ’ 00.89 ” W; 1368 m elev.]; 1975; Böttger leg.; SMF 8866 • 2 ♂ (31.3: 20.4; 48.3: 30.4) 2 ♀ (22.7: 14.7; 42.6: 27.1); Izabal, Puerto Barrios, Río Las Escobas; [15 ° 41 ’ 09.92 ” N, 88 ° 38 ’ 40.91 ” W; 93 m elev.]; 18. X. 1986; leg. unknown; UVGCR 430 • 1 ♂; Izabal, Río Dulce [15 ° 39 ’ 26 ” N, 88 ° 59 ’ 58 ” W; 4 m elev.]; 20. X. 1997; F. Bolañoz leg.; UVGCR 173 • 1 juv. ♂; Izabal, Puerto Santo Tomás [15 ° 41 ’ 37 ” N, 88 ° 37 ’ 32 ” W; 22 m elev.], Playa Ramonastes; 29. V. 1994; M. L. Priaz & W. Dio leg.; UVGCR 243 • 1 immat. ♂; Izabal, Cerro San Gil, Río Las Escobas [15 ° 39 ’ 56.40 ” N, 88 ° 46 ’ 54.72 ” W; 1113 m elev.]; 21. X. 2001; Ecología Avanzada – grupo 2 leg.; UVGCR 454 • 2 ♂ (32.8: 21.1; 38.8: 24.0) 1 ♀ (58.1: 35.2); Baja Verapaz, Salamá [15 ° 06 ’ 01.88 ” N, 90 ° 18 ’ 51.60 ” W; 940 m elev.]; 20. IV. 1934; E. R. Blake leg.; FMNH 1829 • 1 ♂ (33.5: 21.4) 3 ♀ (18.8: 12.8 - 27.7: 17.5); Zacapa, Villa Rocosa, Río El Jutillo, near Usumatlán; 15 ° 00 ’ 45 ” N, 89 ° 49 ’ 58 ” W; [717 m elev.]; 21. VII. 2014; I. S. Wehrtmann & M. Orozco leg.; UCR-MZ uncat. • 1 ♂; Chimaltenango, Yepocapa [14 ° 30 ’ N, 90 ° 57 ’ W]; 1400 m elev.; 6. VI. 1949; leg. unknown; USNM 230092 • 1 ♂ 2 ♀ 1 juv., Chimaltenango, Yepocapa; 1460 m elev.; XI. 1949; leg. unknown; USNM 230093 • 1 ♂; Chimaltenango, Yepocapa, 13 - 14. VII. 1949, H. T. Dalmat leg.; USNM 90364 • 1 ♂ (77.4: 48.3) 1 ♀ (80.9: 49.6), Chimaltenango, stream in area San Pedro Yepocapa; XII. 1948; H. T. Dalmat leg.; USNM 88721, • 1 ♂; Guatemala, Lago de Amatitlán, Tacatón; [14 ° 26 ’ 27.35 ” N, 90 ° 33 ’ 33.02 ” W; 1195 m elev.]; 31. X. 1993; C. MacVean leg.; UVGCR 135 • 1 ♂; Guatemala, Amatitlán; [14 ° 28 ’ 29.74 ” N, 90 ° 34 ’ 38.94 ” W; 1190 m elev.]; 6. IV. 1991; J. Ruiz R. leg.; UVGCR 148 • 1 ♂; Guatemala, Ciudad de Guatemala, mercado La Plazita [probably captured in Lago Amatitlán]; 14. XI. 2000; F. Peloéz leg.; UVGCR 58 • 1 ♂ (74.8: 46.6); Guatemala, Santa Catarina Pinula, Puerta Parada [14 ° 33 ’ 21.21 ” N, 90 ° 27 ’ 09.28 ” W; 1837 m elev.], Río Acatán; 2. III. 1987; W. Dix leg.; UVGCR 523 • 1 ♂; Guatemala, Santa Catarina Pinula, Puerta Parada; 1978; M. Dix leg.; UVGCR 438 • 1 ♂ (83.2: 52.3); Guatemala, carretera to El Salvador, km 16; [14 ° 32 ’ 47.82 ” N, 90 ° 27 ’ 06.33 ” W; 1877 m elev.]; date unknown; S. Rodas leg.; UVGCR 499 • 1 ♂ (33.4: 21.7) 1 ♀ (45.5: 29.1); Solalá, boca del río Panajachel [14 ° 44 ’ 04.96 ” N, 91 ° 09 ’ 26.20 ” W; 1565 m elev.]; 13. ii. 1970; W. Bussing leg.; UCR-MZ 2671 - 01 • 1 ♂ (70.7: 45.8) 1 ♀ (61.1: 42.3); Solalá, Lake Atitlán [14 ° 42 ’ N, 91 ° 12 ’ W; 1558 m elev.]; date unknown; G. A. Artamonoff leg.; FMNH 12288 • 1 ♂; Solalá, Lago Atitlán; V. 1977; G. Martínez leg.; UVGCR 111 • 1 ♂, Solalá, Panajachel [14 ° 44 ’ 29 ” N, 91 ° 09 ’ 48 ” W]; 6. X. 1997; J. Cruz leg.; UVGCR 172 • 1 ♂, Solalá, Panajachel, cerca del muelle; [14 ° 44 ’ 29.25 ” N, 91 ° 09 ’ 48.20 ” W; 1563 m elev.]; data unknown; J. Cruz leg.; UVGCR 146 • 1 ♂ (65.0: 40.0); Solalá, Panajachel (bought in the market, captured at Lago Atitlán); 21. VII. 2013; I. S. Wehrtmann leg.; UCR-MZ 3114 - 03 • 1 ovig. ♀, Solalá, Panajachel (bought in the market, captured at Lago Atitlán); 21. VII. 2013; I. S. Wehrtmann leg.; UCR-MZ 3114 - 01 • 4 ♂ (53.4: 33.9 - 59.0: 36.6) 1 ♀ (61.8: 38.8); Solalá, Panajachel (bought in the market, captured at lake Atitlán); I. 2014; C. Magalhães leg.; INPA 2020 • 1 ♂, Sacatepéquez, Municipalidad Mixco, Finca La Esmeralda [? Finca La Esmeralda, in San Lucas Sacatepéquez, Department Sacatepéquez: 14 ° 34 ’ 53.88 ” N, 90 ° 37 ’ 03.71 ” W; 1637 m elev.]; 17. VIII. 1999; C. Cardona leg.; UVGCR 16 • 1 ♂ (23.8: 16.1); Suchitepéquez, Patutul, Finca Los Tarrales, stream inside the farm; 14 ° 31 ’ 28 ” N, 91 ° 08 ’ 07 ” W; 875 m elev.; 19. I. 2014; I. S. Wehrtmann, M. Orozco, C. Magalhães & M. W. Dix leg.; UCR-MZ 3231 - 02 • 15 spec.; Santa Rosa, laguna de Ayarza; [14 ° 25 ’ 07 ” N, 90 ° 07 ’ 33 ” W; 1412 m elev.]; 10 - 11. V. 1947; R. R. Miller leg.; USNM 1089230 • 1 ♂; Santa Rosa, Barbarena; [14 ° 18 ’ 34 ” N, 90 ° 21 ’ 40 ” W; 1225 m elev]; 9. XI. 2000; J. Castillo leg.; UVGCR 171 • 1 ♂; Santa Rosa, Taxisco; [14 ° 04 ’ 02 ” N, 90 ° 28 ’ 04 ” W; 179 m elev.]; V. 1994; J. R. Valdéz leg.; UVGCR 112 • 2 juv. ♂, Santa Rosa, Taxisco-Monterrico; [13 ° 59 ’ 38.63 ” N, 90 ° 27 ’ 52.75 ” W; 30 elev.]; 20. X. 2000; leg. unknown.; UVGCR 456 • 1 ♂; Escuintla, Puerto San José; [13 ° 55 ’ 45 ” N, 90 ° 49 ’ 13 ” W; 5 m elev.]; 7. XI. 2000; D. Maza leg.; UVGCR 390 • 1 ♂; Escuintla, Puerto San José; 21. IX. 1997; A. Turcois leg.; UVGCR 159 • 1 ♂; Escuintla, aeropuerto Las Lisas [13 ° 55 ’ 43 ” N, 90 ° 49 ’ 53 ” W; 12 m elev.], municipalidad San José; 7. X. 1976; M. W. Dix leg.; UVGCR 435.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F457E008FF64FED0FAF31A1B.taxon	distribution	DISTRIBUTION. — Guatemala (Alta Verapaz, Baja Verapaz, Chimaltenango, Chiquimula, Escuintla, Guatemala, Izabal, Petén, Quiché, Santa Rosa, Solalá, Suchitepéquez, Totonicapán, Zacapa) (Fig. 16), Mexico, Belize, Honduras, and El Salvador (Pretzmann 1980; Rodríguez 1982, 2001; Villalobos Hiriart & Álvarez 2008; Wehrtmann et al. 2016; this study). OTHER RECORDS IN GUATEMALA. — Pretzmann (1980): Petén, Mopán, at Río Melchor Mencos, border with Belize [17 ° 03 ’ 27 ” N, 89 ° 09 ’ 06 ” W; 92 m elev.]; Petén, near Poptún [16 ° 21 ’ N, 89 ° 26 ’ W; 544 m elev]; Alta Verapaz, tributary of Río Colochie [= Polochic], NE Tucura [= Tucurú, 15 ° 17 ’ 51.32 ” N, 90 ° 06 ’ 58.78 ” W; 434 m elev.]; Chiquimula, Río Apantes [? Aldea Apantes, 14 ° 32 ’ 45.73 ” N, 89 ° 24 ’ 28.64 ” W; 984 m elev., municipality of Concepción Las Minas], Melen, NW Esquipulas; Guatemala, 14 km S Guatemala City, N San José Pinula [14 ° 32 ’ 46 ” N, 90 ° 24 ’ 41 ” W; 1748 m elev.]. Rodríguez (2001): Solalá, Lago de Atitlán, 4 miles E of Panajachel [14 ° 41 ’ 50.43 ” N, 91 ° 07 ’ 05.52 ” W; 1604 m elev.]; Guatemala, Río Piscaya [= Pixcaya, Department Chimaltenango, 14 ° 51 ’ 24.85 ” N, 90 ° 39 ’ 44.99 ” W; 759 m elev.], 2 km N junction National RT 5 - RT 4, small tributary of Río Piscaya, at 40 km N from Guatemala; Guatemala, km 56 from Guatemala City on route 5 to Salamá, small tributary of Río Grande [El Quiché, 14 ° 53 ’ 48.53 ” N, 90 ° 40 ’ 20.42 ” W; 733 m elev.]; Guatemala, km 71 from Guatemala City on route 5 to Salamá, small tributary of Río Grande [Baja Verapaz, 14 ° 54 ’ 48.73 ” N, 90 ° 31 ’ 24.78 ” W; 967 m elev.].	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F457E008FF64FED0FAF31A1B.taxon	description	DESCRIPTION OF G 1 (Fig. 6 A-C) Straight in mesial view, narrow in the proximal 2 / 3, wide in the distal third, moderately compressed mesolaterally; caudal margin moderately convex subdistally in mesial view; cephalic margin somewhat irregular, with few short setae more widely spaced medianly, close together subdistally at base of widened mesial process. Marginal suture on mesial surface, straight up to apex, with row of large marginal setae along proximal portion partially extending to marginal plate as row of short setae. Marginal process somewhat narrow, slightly rounded, extended as long as mesial margin of apex. Lateral suture incomplete, marked by shallow sulcus on caudal surface. Mesial process widened, nearly as wide as main stem, roughly trapezoidal, directed cephalad, bilobed, with proximal lobe larger, broadly rounded; distal lobe narrow, rounded, situated obliquely in relation to proximal lobe, slightly longer in mesial view; cephalic surface of mesial process distinctly concave in lateral view, convex in mesial view. Apex oblong, situated apically, open, mesial and lateral margins of same height; field of apical spines well developed, with short, small spines; spermatic channel opening on apex cavity, situated towards caudal end. Cephalic surface with strong triangular, subdistal cephalic spine, pointing cephalad.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F457E008FF64FED0FAF31A1B.taxon	discussion	REMARKS The correct status of the type material of this species and three other synonymous taxa is somewhat unclear. Alphonse Milne-Edwards (1866) offered a very brief description of apparently a single specimen from a river of Coban (Alta Verapaz) for which he provided measurement (cw 75 mm × cl 47 mm) but did not inform the sex. However, it is not explicitly mentioned in the text that the specimen would be the type (in the sense of the name-bearing specimen). Although it may seem that A. Milne-Edwards (1866) used a single specimen, this cannot be unequivocally assumed because Rathbun (1905) mentioned a slightly smaller female with the same characters in the MNHN collection that she treated as “ cotype ”. Furthermore, when visiting the MNHN in September 2015 for examining the Guatemalan material, the senior author found a box containing two dry females of R. bocourti (MNHN entry 190 - 1866 in Bocourt’s “ Expédition du Mexique ” [catalogued as MNHN-B 22814]) with indications of “ type ” and “ co-type ”, one of which partially disarticulated and with the carapace badly damaged (Fig. 7 A). Rathbun (1905) mentioned that “ Le type du P. Bocourti, c’est-à-dire l’individu que M. A. Milne-Edwards a mesuré, est une grande femelle ” [The type of P. Bocourti, that is to say the individual that Mr. A. Milne-Edwards measured, is a large female] and that “ Le femelle cotype est un peu plus petite que le type ” [The female cotype is slightly smaller than the type]. By this action, Rathbun (1905) was the first author before the year 2000 to have “ unambiguously selected a par - ticular syntype to act as the unique name-bearing type of the taxon ” as stated in the Article 74.5 (ICZN 1999), which can be taken as a valid lectotype designation. Later, Rodríguez (1982) measured the larger female with cw 76.5 mm × cl 48.5 mm, the smaller female with cw 74.3 mm × cl 48.4 mm, and remarked that the carapace of the former was broken; he treated them as “ type ” and “ paratype ”, respectively. Thus, the larger, partially damaged female of MNHN-B 22814 (Fig. 7 A) must be considered a valid lectotype designation by Rathbun (1905) and, assuming that A. Milne-Edwards (1866) may have had another specimen at his disposal, the smaller female treated as “ cotype ” by Rathbun (1905) and kept under the same catalogue number should be treated as paralectotype. Three Pseudothelphusa species from Guatemara were described by Rathbun (1905) based on female specimens: Pseudothelphusa similis, Ps. cobanensis, and Ps. grallator, which have been considered to be junior synomyms of R. bocourti (see Rodríguez 1982; Ng et al. 2008). Rathbun (1905) founded Ps. similis on a single male specimen but also mentioned 17 juvenile specimens from the same locality and attributed a slight morphological difference between them to age. As the male, to which she provided measurements, is unequivocally termed “ type ”, this is the holotype fixed by original designation (ICZN 1999, Art. 73.1.1). The holotype of Ps. similis (MNHN-B 4624) is a dry male with a longitudinal cleft along the middle and on the right side of the dorsal region of the carapace (Fig. 7 B). The type specimens of Ps. cobanensis, a well-preserved female (Fig. 7 C) and a male in very bad condition (Fig. 7 D), are also dry. Rathbun’s (1905: 296, 297) action, by clearly treating only the female as “ type ”, can be interpreted as she has set it as the unique name-bearing type of this taxon (Art. 73.1.1, ICZN 1999), therefore fixing the holotype by original designation. The male was designated as “ co-type ” (Rathbun, 1905: 297, text-fig. 88), which can then be considered as a reference to paratype. This was also Rodríguez’s (1982: 101) interpretation when treated the female as the holotype and the male as paratype. Rathbun (1905: 297) based the description of Pseudothelphusa grallator on at least two specimens: a female (cw 61.3 mm × cl 38.9 mm) and a male (cw 59.2 mm × cl 37.8 mm) and, in “ Dimensions ”, provided a table with their measurements. In this table, she indicated the female as “ Type ”. In the section “ Distribution ”, she listed eight specimens from the same locality: three females (including the “ type ”, numbered 623 d in the Bocourt’s material from the “ Expédition du Mexique ”), one male (no. 624 d in Bocourt’s catalogue), and additionally one female and three young specimens. Since the female with the number 623 d (MNHN-B 4627) is clearly marked as “ Type ” by Rathbun (1905), this specimen is the holotype fixed by original designation (Art. 73.1.1, ICZN 1999). Rodríguez (1982) remarked that the situation of these specimens in the Paris Museum is somewhat confusing but, even taking into account the poor condition of the material, he concluded that the reasonably well-preserved female measuring cw 60.5 mm × cl 39 mm should be the one Rathbun considered as the “ Type ”. During a visit to the MNHN in September 2015, the senior author found that the condition of some of these specimens had worsened but this dry female was still in reasonably good condition and preserved in a box with the catalogue number 4627 and with a label stating “ Bocourt (Expédition du Mexique) (no. 623 d de son catalogue) ”; this box also had the indicative sign of holotype (the red circle label) attached to it (Fig. 7 E). This specimen should be the one considered by Rodríguez (1982) as the holotype. Another box, bearing a handwritten label and stating “ Pseudothelphusa grallator Type 4627 ”, contained one dry female with the dorsal region of the carapace severely damaged and almost entirely disarticulated as well as the remnants of a male specimen with the abdomen partially broken and the sternopleonal cavity glued to the box (this male has the number “ 624 d ” written on the anterior portion of the sternum) (Fig. 7 F, G). Although these lots bear a label with the word “ TYPE ” written in red, these specimens should be considered as paratypes; Rodríguez (1982) considered the male as being an allotype.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F453E00BFC76FE70FEC618A5.taxon	description	(Figs 6 D, E; 16)	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F453E00BFC76FE70FEC618A5.taxon	materials_examined	TYPE MATERIAL EXAMINED. — Holotype. El Salvador • 1 ♂ (37.3: 24.4); Santa Ana, Los Planes Farm [northeast of Metapán, Montecristo National Park; 14 ° 24 ’ N, 89 ° 22 ’ W]; 1830 m elev.; 30. X. 1950; R. Mertens leg.; SMF 1822. OTHER MATERIAL EXAMINED. — Guatemala • 1 ♂ (soft carapace) 3 juv. ♀; Chiquimula, Río Atulapa, 3 miles east of Esquipulas, on road CA 10; [14 ° 33 ’ 45 ” N, 89 ° 18 ’ 37 ” W; 916 m elev.]; 5. IV. 1971; R. M. Bailey leg.; USNM 1089229.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F453E00BFC76FE70FEC618A5.taxon	distribution	DISTRIBUTION. — Guatemala (Chiquimula) (Fig. 16), Honduras (Ocotepeque) and El Salvador (Santa Ana) (Bott 1956; Wehrtmann et al. 2016; Acevedo-Alonso & Cumberlidge 2022; Magalhães & Wehrtmann 2025; this study).	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F453E00BFC76FE70FEC618A5.taxon	description	DESCRIPTION OF G 1 (Fig. 6 D, E) Stout, straight in mesial view, narrow in proximal 2 / 3, very wide in distal third, moderately compressed mesolaterally; caudal and cephalic margins straight in mesial view. Marginal suture on mesial surface straight up to apex along most of stem, slightly curved in caudal direction in distal quarter, with short row of large marginal setae along proximal portion. Marginal process somewhat narrow, rounded, not extending beyond mesial margin of apex. Lateral suture incomplete, marked by shallow sulcus on caudal surface. Mesial process greatly widened, slightly wider (roughly 1.2 times) than main stem, subretangular, directed cephalad, bilobed, with proximal lobe bearing broadly subtriangular teeth pointing basally; distal lobe as narrow subtriangular teeth slightly shorter than proximal lobe in mesial view; mesial lobe with proximal margin bearing short row of minute setae; distal margin slightly crenulate, cephalic surface slightly concave in lateral view, bearing strong triangular, subdistal spine pointing cephalad, and small, rounded protuberance located just below subdistal spine. Apex oblong, short, situated obliquely, open, mesial slightly higher than lateral one; field of apical spines moderately developed, with short small spines; spermatic channel opening on apex cavity, situated towards caudal end.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F453E00BFC76FE70FEC618A5.taxon	discussion	REMARKS This species was known only from its type locality, in the department of Santa Ana, in northwestern El Salvador. Later, Acevedo-Alonso & Cumberlidge (2022) listed the occurrence of this species in Guatemala and Honduras without specifying voucher material or distributional data. Thus, our report herein represents the first published record of this species for Guatemala.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F450E00AFF41FBD2FCC61ADB.taxon	description	(Figs 6 F-H; 8; 16)	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F450E00AFF41FBD2FCC61ADB.taxon	materials_examined	TYPE MATERIAL EXAMINED. — Lectotype (designated by Smalley 1965). Guatemala • 1 ♂ (50.0: 30.9, in bad condition); Suchitepéquez, stream of Saint Augustín, near Atitlán [? Finca San Agustím; 14 ° 28 ’ 23.93 ” N, 91 ° 12 ’ 53.26 ” W, 609 m elev.], Pacific drainage; date unknown, M. Bocourt; USNM 20047. Paralectotype. Guatemala • 1 ♀, Suchitepéquez, stream of Saint Augustín, near Atitlán [? Finca San Agustin; 14 ° 28 ’ 23.93 ” N, 91 ° 12 ’ 53.26 ” W, 609 m elev.], Pacific drainage; M. Bocourt leg.; MNHN Entry 844 - 1866; MNHN-IU- 2017 - 8048 (= MNHNB 5322). OTHER MATERIAL EXAMINED. — Guatemala • 1 ♂ (69.5: 41.4); San Marcos, Finca El Porvenir; [14 ° 57 ’ 43 ” N, 91 ° 56 ’ 26 ” W]; 1370 m elev.; 22. III. 1952; W. Reeder leg.; USNM 1089233 • 2 ♂ (18.9: 13.5 - 35.1: 22.5) 3 ♀ (22.6: 14.9 - 35.7: 22.9), San Marcos, sítio San Rafael, San Marcos; 14 ° 56 ’ 21 ” N, 91 ° 54 ’ 38 ” W; 991 m elev.; 7. VIII. 2015, I. S. Wehrtmann & M. Orozco leg. UCR-MZ uncat. • 1 ♂ (23.5: 17.7); Suchitepéquez, carretera a Chicacao; 14 ° 27 ’ 50 ” N, 91 ° 09 ’ 01 ” W; [471 m elev.]; 19. I. 2014, I. S. Wehrtmann, M. Orozco, C. Magalhães & M. W. Dix leg. UCR-MZ uncat.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F450E00AFF41FBD2FCC61ADB.taxon	distribution	DISTRIBUTION. — Guatemala (San Marcos, Suchitepéquez) (Fig. 16) and Mexico (Rathbun 1897, 1905; Pretzmann 1972; this study).	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F450E00AFF41FBD2FCC61ADB.taxon	description	DESCRIPTION OF G 1 (Fig. 6 F-H) Somewhat slender, slightly arched in cephalic direction in mesial view, moderately compressed mesolaterally; caudal margin with median constriction in mesial view; cephalic margin gently concave in proximal 2 / 3, with few short setae subdistally; lateral surface with irregular rows of short to large setae in first half and few minute setae subdistally. Marginal plate fused subdistally to caudal surface. Marginal suture on mesial surface straight up to apex, with row of large to short marginal setae along proximal portion. Marginal process subrectangular, nearly as long as mesial margin of apex. Lateral suture incomplete, marked by distinct sulcus on caudal surface. Mesial process broad, unilobed in mesial view, subtriangular, narrower than width of main stem in mesial view, directed cephalad; proximal corner rounded, distal corner with small sharp spine pointing lateralad in lateral and apical-cephalic views; cephalic surface of mesial process distinctly concave in lateral and apical views. Apex oblong, situated apically, open, mesial and lateral margins about same height; field of apical spines moderately developed, with short small spines; spermatic channel opening on apex cavity, situated medianly. Cephalic surface with two strong, triangular, subdistal spines, pointing cephalad.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F450E00AFF41FBD2FCC61ADB.taxon	discussion	REMARKS Rathbun (1897) described the species based on a male and a female at this time deposited in the holdings of the MNHN (Paris); the male specimen was later sent to the USNM collection (Washington, D. C.). When Smalley (1965) introduced the subgenus Pseudothelphusa (Anaphyrmos), he designated Raddaus tuberculatus as the type species because it was the first species he included in the subgenus to have been described from a male and, to consolidate his decision, he designated the specimen deposited in the USNM (20047) as lectotype. This specimen is in poor condition, completely disarticulated, the posterior ventral portion severely damaged, the posterior portion of the sternopleonal cavity broken, with both gonopods missing (they were not found in a small vial kept within the jar as usual) (Fig. 8).	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F451E00AFEA0FDF3FCC21D86.taxon	description	(Fig. 14)	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F451E00AFEA0FDF3FCC21D86.taxon	materials_examined	TYPE MATERIAL (NOT EXAMINED). — Syntypes. Guatemala • 1 ♂; MNHN-IU- 2014 - 23193 (= MNHN-B 18869) • 2 ♂; MNHN-IU- 2014 - 23194 (= MNHN-B 18870) • 1 ♀; MNHN-IU- 2014 - 23192 (= MNHN-B 19855) • 1 ♀; MNHN-IU- 2014 - 23196 (= MNHNB 18873). TYPE LOCALITY. — Guatemala, Alta Verapaz, Chamá mountains, municipality of San Pedro Carchá, Chiacam cave [15 ° 32 ’ 49.46 ” N, 90 ° 06 ’ 35.82 ” W; 858 m elev.].	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F451E00AFEA0FDF3FCC21D86.taxon	distribution	DISTRIBUTION. — Guatemala (Alta Verapaz) (Delamare Deboutteville 1976 a, 1976 b) (Fig. 14).	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F451E00AFEA0FDF3FCC21D86.taxon	description	DESCRIPTION OF G 1 See Delamare Deboutteville (1976 b).	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F451E00AFEA0FDF3FCC21D86.taxon	discussion	REMARKS According to Delamare Deboutteville (1976 b), the syntypes were originally deposited at the Laboratoire d’Ecologie Generale of the MNHN. However, these specimens could not be located in the crustacean collection during the visit of the senior author to the MNHN in September 2015 but were subsequently incorporated into this collection (see at https: // science. mnhn. fr / institution / mnhn / collection / iu / item / list? fulltext = juberthiei)	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F451E00AFC0DFF11FB201F84.taxon	description	(Fig. 14)	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F451E00AFC0DFF11FB201F84.taxon	description	DESCRIPTION OF G 1. — See Delamare Deboutteville (1976 b).	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F451E00AFC0DFF11FB201F84.taxon	materials_examined	TYPE MATERIAL (NOT EXAMINED). — Syntypes. Guatemala • 1 ♂; MNHN-IU- 2017 - 8057 (= MNHN-B 18874) • 2 ♀; MNHN-IU- 2017 - 8058 (= MNHN-B 19856) • 1 ♀; MNHN-IU- 2014 - 23216 (= MNHN-B 18868). TYPE LOCALITY. — Guatemala, Alta Verapaz, caves C 3 and G 3 at Pampur mountains [15 ° 27 ’ 38.93 ” N, 90 ° 35 ’ 49.33 ” W; 906 m elev.]	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F451E00AFC0DFF11FB201F84.taxon	distribution	DISTRIBUTION. — Guatemala (Alta Verapaz) (Delamare Deboutteville 1976 a, 1976 b) (Fig. 14).	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F451E00AFC0DFF11FB201F84.taxon	discussion	REMARKS These syntypes were originally deposited at the Laboratoire d’Écologie generale of the MNHN (see Delamare Deboutteville 1976 b) but could not be located in the crustacean collection during the visit of the senior author to the MNHN in September 2015. However, they were subsequently incorporated into the crustacean collection (see at http: // coldb. mnhn. fr / catalognumber / mnhn / iu / 2017 - 8057 and http: // coldb. mnhn. fr / catalognumber / mnhn / iu / 2017 - 8058).	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F451E004FC3AFAB5FE72199A.taxon	description	(Figs 9; 14)	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F451E004FC3AFAB5FE72199A.taxon	materials_examined	TYPE MATERIAL EXAMINED. — Holotype. Guatemala • 1 ♂; Alta Verapaz, exact locality unknown; 1975; collected by the Dreux Expedition; MNHN-IU- 2008 - 11065 (= MNHN-B 20118) as in Rodríguez & Hobbs (1989). Paratype. Guatemala • 1 ♂; MNHN-IU- 2014 - 11972 (= MNHNB 20352), as in Rodríguez & Hobbs (1989). OTHER MATERIAL EXAMINED. — Guatemala • 1 ♂; Alta Verapaz, exact locality unknown; 1975; collected by the Dreux Expedition; MNHN-IU- 2014 - 10311 (= B 27918).	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F451E004FC3AFAB5FE72199A.taxon	distribution	DISTRIBUTION. — Guatemala (Alta Verapaz) (Rodríguez & Hobbs 1989) (Fig. 14).	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F451E004FC3AFAB5FE72199A.taxon	description	DESCRIPTION OF G 1 (Fig. 9 C, D) Stem moderately compressed mesolaterally, falciform in overall appearance, distal portion distinctly arched cephalad in laterocephalic view; lateral margin convex, caudal margin concave in mesocaudal view; some short seta present along both margins. Caudal surface with small protuberance on median portion of caudal margin; mesial surface with irregular row of few long and short setae longitudinally along proximal half. Marginal suture on mesial surface distinctly curved caudally on distal end, with row of long setae along its proximal portion. Marginal process large, lamelliform in mesocaudal view, not overreaching mesocaudal margin of apex. Lateral suture incomplete, marked by sulcus along first 4 / 5 of mesocaudal surface, shallower distally. Mesial process (“ cephalic process ” sensu Rodríguez & Hobbs 1989) greatly developed, strong, subtriangular, long (approximately 1.2 longer than width of apex, measured in mesocaudal view), recurved. Cephalic surface strongly concave distally, with cephalic process as short conical spine (“ basal spine ” or “ lateral process ” sensu Rodríguez & Hobbs 1989) situated near base of mesial process; smooth otherwise. Apex oblong, elongated caudocephalicaly; its margins asymmetric, mesocaudal margin higher than laterocephalic one, both unarmed, outline of mesocaudal margin rounded. Field of apical spines well developed, open (not concealed by apical margins), obliquely directed towards cephalic side, narrow, with short spines distributed in caudocephalic direction.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F451E004FC3AFAB5FE72199A.taxon	discussion	REMARKS The exact locality in the department of Alta Verapaz where the types of Z. falcata were collected is unknown (the distribution record in the Figure 14 is arbitrarily represented in the center of the department: approximately 15 ° 39 ’ 36 ” N, 90 ° 05 ’ 10 ” W). Rodríguez & Hobbs (1989), based on Delamare Deboutteville (1976 b) and Delamare Deboutteville & Juberthie (1976), only indicated that they were collected by the Dreux Expedition in 1975. This expedition explored more than 400 caves in that department in the years 1974 - 1975 (Courbon & Dreux 1976; Courbon et al. 1976).	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F45FE004FEBEFCF3FB041D67.taxon	description	(Figs 10 A, B; 14)	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F45FE004FEBEFCF3FB041D67.taxon	materials_examined	TYPE MATERIAL EXAMINED. — Holotype. Guatemala • 1 ♂ (26.4: 16.5); Guatemala, 14 km south of Guatemala City, near San José Pinula; [14 ° 33 ’ 01.34 ” N, 90 ° 26 ’ 54.00 ” W; 1880 m elev.]; date unknown; I. Poglayen-Neuwall leg.; NHMW 4063. OTHER MATERIAL EXAMINED. — Guatemala • 1 ♂ (23.5: 14.5); Guatemala, Santa Catarina Pinula [14 ° 34 ’ N, 90 ° 30 ’ W], km 14 en la carretera a El Salvador; 1850 m elev.; VIII. 1993; R. Dix; UVGCR 309 • 1 ♂ (27.3: 17.5); Guatemala, Santa Catarina Pinula, Puerta Parada [14 ° 34 ’ N, 90 ° 27 ’ W], Río Acatán; 1880 m elev.; X. 1990; R. Dix leg. UVGCR 224.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F45FE004FEBEFCF3FB041D67.taxon	description	COMPARATIVE MATERIAL EXAMINED. — El Salvador • 1 ♂ (23.6: 13.9), holotype of Zilchi zilchi (Bott, 1956); Department Santa Ana, hacienda Los Planes; date and leg. unknown; SMF 2445.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F45FE004FEBEFCF3FB041D67.taxon	distribution	DISTRIBUTION. — Guatemala (Guatemala) (Pretzmann 1978; this study) (Fig. 14).	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F45FE004FEBEFCF3FB041D67.taxon	description	DESCRIPTION OF G 1 (Fig. 10 A, B) Stem moderately compressed mesolaterally, nearly straight in mesocaudal view, distal portion slightly bend cephalad in laterocephalic view; cephalic margin slightly convex, caudal margin slightly concave in mesocaudal view. Mesial surface with irregular row of few long setae longitudinally on median portion. Marginal suture nearly straight on mesial surface, with row of long setae along its proximal portion. Marginal process large, lamelliform, not overreaching mesocaudal margin of apex. Lateral suture incomplete, marked by sulcus along first 4 / 5 of the caudal surface, shallower distally. Mesial process moderately developed, strong, subtriangular, its length subequal to width of apex, slightly recurved, both margins unarmed. Cephalic surface nearly straight distally, with cephalic process as short conical spine, and well-developed spiny cephalic lobe. Terminal portion of mesial surface with distinct rounded, spined subapical lobe nearly coalescent with also spined, enlarged portion of mesocephalic margin of apex. Apex narrow, slit-like, elongated in caudocephalical direction; its margins asymmetric, mesocaudal margin low and unarmed towards caudal side, with enlarged and spined lobe towards cephalic side and slightly projected in cephalic direction; laterocephalic margin unarmed. Field of apical spines poorly developed, directed towards cephalic side, narrow, with short spines distributed along the caudocephalic length, nearly concealed by margins.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F45FE004FEBEFCF3FB041D67.taxon	discussion	REMARKS So far, this taxon has been treated as a subspecies of Zilchia zilchi (see Pretzmann 1978; Ng et al. 2008; Villalobos Hiriart & Álvarez 2008; Wehrtmann et al. 2016). A comparison with the G 1 of the holotype of the nominal subspecies showed that Z. germani has a subapical, rounded, spined lobe on the distal portion of mesial surface (“ sal ” in Fig. 10 A, B), whereas in Z. zilchi this lobe is reduced to a vestigial spine (“ sal ” in Fig. 10 C). Furthermore, the cephalic lobe on the distal portion of the cephalic side is more developed and slightly larger and narrower than the cephalic spine in Z. germani (“ cp ” and “ cl ” in Fig. 10 B), whereas it is less developed and slightly lower and wider than the cephalic spine in Z. zilchi (Fig. 10 D). The mesocaudal margin of apex is somewhat more enlarged and slightly higher in Z. germani (“ am ” in Fig. 10 A, B) than in Z. zilchi (“ am ” in Fig. 10 C, D). These differences justify treating them as separated species. Pretzmann (1980: 658) mixed up the captions of the illustration for this species with those for Isabellagordonia (Phrygiopilus) acanthophalla ibarrai (see Pretzmann 1980: 659); the actual information for Potamocarcinus (Zilchia) zilchi germani in Pretzmann (1980: 658) should be: “ plate 8 figs 32 - 36, plate 16 fig. 72 ” (C. Magalhães, pers. observation). The information of the type locality was also mixed up in that publication: the correct type locality is “ Guatemala, Department of Guatemala, 14 km south of Guatemala City, near San José Pinula ”, and not “ Río Guyamas, NE El Progreso, Honduras ” (Wehrtmann et al. 2016).	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F45FE001FC43F994FD0F1DE6.taxon	description	(Figs 11; 14) urn: lsid: zoobank. org: act: 2 B 37 C 5 D 5 - F 62 A- 412 E-A 798 - 7324 C 6525 F 58	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F45FE001FC43F994FD0F1DE6.taxon	materials_examined	TYPE MATERIAL. — Holotype. Guatemala • ♂ (32.7: 20.6), Zacapa, San Lorenzo, Sierra de Las Minas [15 ° 08 ’ 09 ” N, 89 ° 37 ’ 22 ” W], Cerro de Los Monos, 2200 m elev., date and leg. unknown. UVGCR 518. Paratypes. Guatemala • 1 ♂ (28.4: 17.7) 2 ♀ (23.7: 15.6; 24.2: 15.9); collecting data unknown; UVGCR 519.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F45FE001FC43F994FD0F1DE6.taxon	diagnosis	DIAGNOSIS. — G 1 with mesial process strong subtriangular, large (approximately 1.1 wider than width of apex in mesocaudal view), obliquely pointing downwards, lower margin unarmed, upper margin irregularly serrate; cephalic process as conical spine approximately as large as mesial process; apex with asymmetric margins, mesocaudal margin higher than laterocephalic one, entirely bordered by row of teeth and not overhanging apical field of spines, laterocephalic margin unarmed.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F45FE001FC43F994FD0F1DE6.taxon	etymology	ETYMOLOGY. — The specific epithet refers to the Latin word “ corona ” due to the crown-like appearance of the G 1 apex in mesocaudal view.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F45FE001FC43F994FD0F1DE6.taxon	distribution	DISTRIBUTION. — Guatemala (Zacapa); only known from the type locality (Fig. 14).	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F45FE001FC43F994FD0F1DE6.taxon	description	DESCRIPTION OF THE HOLOTYPE Carapace (Fig. 11 A, B) outline ellipsoid, widest at the middle (cw / cl 1.64), dorsal surface smooth, moderately convex longitudially, nearly flat transversally, regions ill defined, epi- and mesobranchial regions slightly more elevated. Pair of distinct gastric pits close to each other, on metagastric region. Cervical grooves nearly straight, deeper proximally, shallower distally, distal end failing to reach anterolateral margin. Postfrontal lobules small, almost indistinct; median groove distinct, shallow. Surface of carapace between front and postfrontal lobules smooth, distinctly deflected anteroventrally. Upper border of front smooth, strongly angulate, nearly straight in dorsal and frontal views, median notch indistinct; lower border carinate, nearly straight in dorsal and frontal views, slightly more projected anteriorly than superior one. Upper orbital margin carinate, lined with faint papillae to external side, smooth towards internal side; lower orbital margin crenulate, lined with faint papillae; exorbital angle very low, obtuse. Anterolateral margin of carapace with set of faint, minute, rounded teeth, increasing in size from anterior to posterior portion; posterolateral margin smooth, marked by faint suture. Epistome (Fig. 11 C, D) narrow longitudinally; epistomial tooth low, slightly deflected anteroventraly, with carinate, smooth borders. Suborbital and subhepatic regions of carapace sidewall smooth (Fig. 11 C, D); pterygostomial regions with narrow, mostly smooth, weakly pilose patches only along outer borders of bucal frame (Fig. 11 C, D). Endopod of Mxp 3 (Fig. 11 C) with outer margin of ischium slightly convex, inner margin straight; merus with outer margin broadly rounded, inner surface of palp bearing tuft of short setae; exopod of 3 rd maxiliped long, narrow, 0.74 length of outer margin of ischium (Fig. 11 C). Aperture of efferent branchial channel wide, subretangular, upper margin smooth (Fig. 11 D). Chelipeds (Fig. 11 A, B) strongly heterochelous, similarly armed, right P 1 larger. Larger cheliped (Fig. 11 A, B, E) with merus subtriangular in cross section; dorsal margin rounded, with irregular row of low tubercles, fainter distally; ventromesial margin lined by longitudinal row of conical tubercles increasing in size distally; ventrolateral margin rounded, marked by single row of faint tubercles; distal upper margin arched, smooth. Carpus with inner margin with four faint low tubercles, prominent median spine, and smooth distally; outer margin rounded, smooth. Palm (Fig. 11 E) swollen (length / breadth 1.43), lateral surface smooth, dorsal border and mesial surface with very faint scattered tubercles, ventral border with irregular row of faint tubercles. Fingers of larger chela (Fig. 11 E) moderately gaping, those of smaller chela slightly gaping, tips not crossing; pollex with three subtriangular large teeth interspaced with smaller ones. Dactylus distinctly arched, slightly longer than palm (dactylus / palm 1.14, measured dorsally), proximal half of dorsal surface of dactylus with longitudinal, irregular rows of faint tubercles; pollex with lower surface bearing row of very faint tubercles. Ambulatory legs mostly disarticulated or broken; P 4 and P 5 still attached to body; slender, ratios dactylus / propodus and dactylus / merus as follows: P 4 (right) = 1.42 and 0.82; P 5 (left) = 1.50 and 0.92, respectively. P 4 and P 5 with dactyli bearing five longitudinal rows of sharp, corneous spines, increasing in size distally. Thoracic sternum approximately as long as broad (Fig. 11 B). Thoracic sternites of Mxp 3 and chelipeds completely fused, except for small notches at lateral edges of sternum. Male sternopleonal cavity densely pilose. Episternites 4 - 6 triangluar posteriorly, episternite 7 posteriorly truncate. Penis short, thick, hook-shaped, emerging from nearby coxo-sternal condyle articulation, located proximally on sternite 8. All pleonal somites free (Fig. 11 B); lateral margins of somites fringed by line of short setae; male pleon with somite VI distinctly longer than preceding ones, slightly shorter than telson (ration telson / somite VI = 0.92), lateral margins slightly concave. Male telson (Fig. 11 B) subtriangular, as long as wide, lateral margins nearly straight, fringed by line of short seate, tip rounded. G 1 (Fig. 11 F-I) somewhat compressed mesolaterally, distal portion moderately arched laterocephalically in mesocaudal view; cephalic margin convex, with irregular rows of minute setae longitudinally on proximal half in mesocaudal view; caudal margin concave in mesocaudal view. Marginal suture along mesial surface, gently curved caudally on distal end; row of long setae along proximal portion of marginal suture. Marginal process large, lamelliform in mesocaudal view, not overreaching mesocaudal margin of apex. Lateral suture incomplete, marked by sulcus along the first 4 / 5 of caudal surface, shallower distally. Mesial process strongly developed, subtriangular, large (approximately 1.1 wider than width of apex in mesocaudal view), obliquely pointing downwards, lower margin unarmed, upper margin irregularly serrate. Cephalic surface slightly concave distally, with strong cephalic process as conical spine approximately as large as mesial process, situated transversally and contiguously to mesial process, obliquely pointing downwards. Apex oblong, elongated caudocephalically; its margins asymmetric, with mesocaudal margin higher than latercephalic one, entirely bordered by row of rounded teeth directed cephalad, not overhanging apical field of spines; lateroapical margin unarmed. Field of apical spines well developed, distally open (not concealed by apical margins), obliquely directed towards cephalic side, narrow, with short spines distributed along caudocephalic length. G 2 approximately as long as G 1, flagellum very slender, regularly tapering.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F45FE001FC43F994FD0F1DE6.taxon	discussion	REMARKS The new species exhibits a quite peculiar G 1, which appears to be similar to that of Z. falcata due to the strong, large mesial process. However, Z. coronata n. sp. can be easily distinguished from the other Guatemalan species of the genus by the following features of the G 1: (1) upper margin of the mesial process serrate vs unarmed in Z. falcata (Fig. 9 C, D), Z. germani (Fig. 10 A, B), and Z. zilchi (Fig. 10 C, D); (2) cephalic process strong, long, and pointing in lateral direction vs reduced to a short spine pointing in mesial direction in Z. falcata (Fig. 9 D), Z. germani (Fig. 10 B), and Z. zilchi (Fig. 10 D); and (3) apex with mesocaudal margin entirely bordered by a row of teeth vs unarmed in Z. falcata (Fig. 9 C, D) and partially spined and strongly elevated in Z. germani (Fig. 10 B) or slightly elevated in Z. zilchi (Fig. 10 D).	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F45AE001FF69F8D7FB351DE7.taxon	description	(Figs 12 A; 17)	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F45AE001FF69F8D7FB351DE7.taxon	materials_examined	TYPE MATERIAL EXAMINED. — Syntypes. Guatemala • 3 ♀, in alcohol, syntypes; Suchitepéquez, stream Saint-Augustin, near Atitlán, Pacific slope; XI. 1866; M. Bocourt leg.; n ° 571 D, MNHN Entry 844 - 1866; MNHN-IU- 2017 - 8063 (= MNHN-B 5058). OTHER MATERIAL EXAMINED. — Guatemala • 2 ♀, in alcohol; Suchitepéquez, stream Saint-Augustin, near Atitlán, Pacific slope; XI. 1866; M. Bocourt leg.; MNHN-IU- 2017 - 8063 (= MNHN-B 5058).	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F45AE001FF69F8D7FB351DE7.taxon	discussion	REMARKS Rathbun (1897) described this species based on a female with cw 31.4 mm × cl 19.2 mm but mentioned that the species was represented by three females numbered 571 in Bocourt’s catalogue. Curiously, the single jar contaning the syntypes seen by one of us (CM) at the MNHN contains five (http: // coldb. mnhn. fr / catalognumber / mnhn / iu / 2017 - 8063) females and three labels with the species identity and similar curatorial and location data but in one of the labels is written “ 5 ♀ ” (Fig. 12 A). Rathbun (1897) gave no indication whatsoever of a type specimen but reported measurements for only one of the females. She subsequently illustrated the Mxp 3 and the front of one of the specimens which she called the “ type ” (Rathbun 1905: 292, text-fig. 84), however, without giving any indication of which specimen she was referring to. In the section “ Habitat ”, Rathbun (1905) mentioned material from the same collecting site deposited both in the MNHN and the USNM (which would be USNM 20045, not examined, marked as “ type ” in the catalogue: see at http: // n 2 t. net / ark: / 65665 / 3102 a 85 dbb 40 f- 4390 - 8038 - 8802256 fc 16 b). We could not find any information about these three additional female specimens not mentioned in Rathbun’s (1897) original publication. Pretzmann (1972: 79) designed a male (USNM 85557) as allotype but mentioned it as holotype in the caption of the figures 475, 476, 553 - 555. This specimen, however, does not belong to the type series. Rodríguez (1982) conjectured that Ps. bisuturalis could be synonymous with R. bocourti but the fact that the type material of Ps. bisuturalis and that of R. tuberculatus come from the very same locality (“ stream Saint-Augustin, near Atitlán, Pacific slope ”), in addition to exhibiting high similarity in their somatic characters, could be an indication that Ps. bisuturalis and R. tuberculatus could be synonymous.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F45AE000FC3CF914FE741865.taxon	description	(Figs 12 B; 17)	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F45AE000FC3CF914FE741865.taxon	materials_examined	TYPE MATERIAL EXAMINED. — Holotype. Guatemala • ♀, dry; Alta Verapaz, exact location and date unknown; M. Bocourt leg.; Expédition du Mexique, 1864 - 1866; MNHN Entry 191 - 1866; MNHN-IU- 2000 - 4040 (= MNHN-B 4040).	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F45AE000FC3CF914FE741865.taxon	discussion	REMARKS Rodríguez (1982) found the holotype of this species to be very similar to Ph. acanthophallus, except for a slight difference in the length / width ratio of the cheliped merus. As the type locality of both species is in the department of Alta Verapaz, the possibility that they are synonymous is quite reasonable. However, the validity of B. gracilipes cannot be ruled out since the exact collecting place of the holotype is unknown (the distribution record in the Fig. 17 is roughly represented in the center of the department: approximately 15 ° 39 ’ 20 ” N, 90 ° 06 ’ 22 ” W).	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F45BE000FF6DFC92FAD21E44.taxon	description	(Fig. 17)	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F45BE000FF6DFC92FAD21E44.taxon	materials_examined	TYPE MATERIAL (NOT EXAMINED). — Holotype. Guatemala • ♀; Alta Verapaz, cave at Lanquín; [15 ° 34 ’ 32 ” N, 89 ° 58 ’ 50 ” W; 346 m elev.]; Champion leg.; NHM 1907.5.15.4.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F45BE000FF6DFC92FAD21E44.taxon	discussion	REMARKS The taxonomic history of Isabellagordonia (Isabellagordonia) Pretzmann, 1967 is somewhat complicated. Pretzmann (1965) introduced the genus Gordonia to describe Gordonia longipes, but soon after Pretzmann (1967) replaced it by Isabellagordonia since that name was preoccupied. Later, Pretzmann (1971) separated this genus into three subgenera: (a) Isabellagordonia (Isabelagordonia) Pretzmann, 1967, including I. (I.) longipes Pretzmann, 1965; (b) Isabellagordonia (Pseudospirothelphusa) Pretzmann, 1965, to accomodate I. (Pp.) strengerae (Pretzmann, 1965) [Phrygiopilus strengerae, chosen as type species], I. (Pp.) propinqua (Rathbun, 1905), and I. (Pp.) proxima (Rathbun, 1905); and (c) Isabellagordonia (Phrygiopilus) Smalley, 1970, comprising I. (Ph.) acanthophallus (Smalley, 1970) and I. (Ph.) chuacusensis (Smalley, 1970). In a subsequent publication (Pretzmann 1972), he also added I. (I.) gracilipes (A. Milne-Edwards, 1866) to the specific composition of the nominal subgenus. In his seminal work on the Pseudothelphusidae, Rodríguez (1982) discussed this confusing situation. Since the description of four of these species were based on females and, hence, their specific identity and generic allocation were uncertain, he opted to recognize Phrygiopilus Smalley, 1970 as the valid genus since it is the oldest generic name available for this group whose type species (Ph. chuacusensis Smalley, 1970) is based on a male holotype. As pointed out by Ng et al. (2008), if Isabellagordonia (Isabellagordonia) Pretzmann, 1967 prove to be senior synonym of Phrygiopilus Smalley, 1970, then the latter name must be replaced by the former one. The somatic features given by Pretzmann (1965) are not sufficiently diagnostic to clearly distinguish this species from others that occur in the region, especially those of the genus Phrygiopilus. Pretzmann (1971, 1972) provided a brief description of the G 1 for this species but mentioned that it was after a drawing by Smalley concerning a specimen from the type locality (“ nach einer Zeichnung von Smalley, ein Exemplar aus der Terra typica betreffend ” – Pretzmann 1972: 93). The only species figured by Smalley (1970) from Alta Verapaz, where the type locality of I. (I.) longipes is situated, is Ph. acanthophallus from Seamay Cave, about 27 km SE from Lanquín but Smalley (1970) mentioned that these species differ in the shape of the carapace and the armature of the chelae. The collection site in a cave and some of the morphological features described (Pretzmann 1965, 1971, 1972) and illustrated (Pretzmann 1972: 169, figs 567 - 570), particularly the retracted frontal margin, the broad carapace as well as the slend and long legs suggest that this might be a valid troglobitic species and probably related to the species currently allocated in Phrygiopilus. Its real identity, however, can only be determined by obtaining adult males from the type locality region, as already pointed out by Smalley (1970) and Rodríguez (1982).	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F45BE000FC32FAB5FA9B1C81.taxon	description	(Figs 12 C; 17)	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F45BE000FC32FAB5FA9B1C81.taxon	materials_examined	TYPE MATERIAL EXAMINED. — Holotype. Guatemala • ♀, dry; Alta Verapaz, Cobán [15 ° 28 ’ 02 ” N, 90 ° 22 ’ 52 ” W]; Expedition du Mexique; M. Bocourt leg.; MNHN Entry 189 - 1866; MNHN-IU- 2000 - 3853 (= MNHN-B 3853).	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F45BE000FC32FAB5FA9B1C81.taxon	discussion	REMARKS According to Rodríguez’ (1982) comments, this species, as well as Pseudothelphusa proxima Rathbun, 1905, would be very close to Ph. acanthophallus. The holotype has the dorsal region of the carapace partially damaged (Fig. 12 C).	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F458E003FF55FA54FAC21DE6.taxon	description	(Figs 12 D; 17)	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F458E003FF55FA54FAC21DE6.taxon	materials_examined	TYPE MATERIAL EXAMINED. — Holotype. Guatemala • ♀, dry; Alta Verapaz, from the environs of Cobán; [15 ° 28 ’ 40 ” N, 90 ° 24 ’ 08 ” W]; M. Bocourt leg.; Expédition du Mexique, 1864 - 1866; MNHN Entry 192 - 1866; MNHN-IU- 2000 - 3854 (= MNHN-B 3854).	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
840F8790F458E003FF55FA54FAC21DE6.taxon	discussion	REMARKS Rodríguez (1982) conjectured that this species could be a junior synonym of Ps. propinqua and both are very closely related to Ph. acanthophallus. The somatic characters that describe these species do not allow a clear distinction between them and, as commented above (see Remarks on Ph. acanthophallus), even with the relatively little material available for this study, a certain degree of morphological variation in G 1 of Ph. acanthophallus was noticed, which could indicate that a complex of species could occur in this region. The resolution of this issue can only be achieved through a study that carries out a much more comprehensive inventory of the crab fauna in the department of Alta Verapaz and the surrounding region.	en	Magalhães, Célio, Wehrtmann, Ingo S. (2025): Taxonomic revision and distribution of the freshwater crabs of the family Pseudothelphusidae (Decapoda, Brachyura) from Guatemala, with the descriptions of two new species and keys to the species of all genera. Zoosystema 47 (26): 581-615, DOI: 10.5252/zoosystema2025v47a26, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2025v47a26.pdf
