Ptychophallus tristani ( Rathbun, 1896 )

Magalhães, Célio, Wehrtmann, Ingo S., Lara, Luis Rólier & Mantelatto, Fernando L., 2015, Taxonomy of the freshwater crabs of Costa Rica, with a revision of the genus Ptychophallus Smalley, 1964 (Crustacea: Decapoda: Pseudothelphusidae), Zootaxa 3905 (3), pp. 301-344 : 320-322

Ptychophallus tristani ( Rathbun, 1896)

( Figs. 39–43 , 83 )

Pseudothelphusa tristani Rathbun, 1896: 378 , pl. 30, fig. 1–5, text-fig. 3.— Rathbun 1898: 535.— Young 1900: 214.— Rathbun 1904: 242 (in list).— Rathbun 1905: 286.— Rathbun 1906: 501 (in list).— Coifmann 1939: 109 (in list).

? Pseudothelphusa tristani— Garcés 2002: 76, 83.— Anonymous 2005: 26.

Potamocarcinus tristani — Ortmann 1897: 317.

Pseudothelphusa (Ptychophallus) tristani — Smalley 1964b: 10, figs. 7, 8.— Bott 1968: 43, fig. 7.

Ptychophallus (Ptychophallus) tristani — Pretzmann 1965: 5.— Pretzmann 1971: 20.— Pretzmann 1972: 85, figs. 496–498, 530, 531.

Ptychophallus (Ptychophallus) campylus Pretzmann, 1968: 13 .— Pretzmann 1971: 21.— Pretzmann 1972: 87, figs. 537–539, 559–561.

Ptychophallus campylus — Rodriguez 1982: 80.

Ptychophallus tristani — Rodriguez 1982: 83, figs. 49c, f, h, 51a–c.— Villalobos 1982: 220 (in list).— Campos & Lemaitre 1999: 560 (map).— Rodríguez & Hedström 2000: 423, 424, fig. 2A, F.— Ng et al. 2008: 177 (in list).— Villalobos Hiriart & Álvarez 2008: 297 (in list).— Lara et al. 2013: 689 (table), 691, fig. 4 (map).

Material examined. COSTA RICA. Locality not specified: male (cw 29.4, cl 19.4), holotype of Ptychophallys (Ptychophallus) campylus Pretzmann, 1968 , NHMW 21849, 1913, Fassl leg.; 1 male, 1 female, USNM 62743, Barianco River, 4.viii.1928, M. Valerio leg. & don.—Alajuela Province, Pacific drainage: 3 males, UCR-MZ 649, San Rafael Creek, 2.5 km S from San Rafael de San Pedro, 29.vii.1972, V. Juárez leg.; 3 males, 4 females, 2 juv., TMNH 4436, Grande de Tárcoles River, 3 mi E from Atenas, small tributary on east bank of Tárcoles, 1 mi from Atenas-Alajuena highway, 580 m alt., 7.vii.1962, A.E.S. Smalley & S.G. Smalley leg.; 3 males, 4 females, UCR- MZ 348, Balsa de Atenas, 20.vi.1969, G. Rojas leg.; 1 male, TMNH 4447, Grande de Tárcoles River, 2.7 mi SE from El Roble, trib. of Tárcoles, 13.vii.1962, A.E. Smalley & G. Smalley leg.; 2 males, 1 female, UCR-MZ 654, Siquiares River, 0.5 km before the train station, Turrúcares, 8.i.1972, C. Villalobos, Castaing & C.E. Villalobos leg.; 2 immat. males, 2 females 4 immat. females, UCR-MZ 2786, La Juana Creek, 4.5 km de San Mateo, road to Maderal, 11.vii.1977, C. Villalobos & C.E. Villalobos leg.; 4 males, 4 females, UCR-MZ 648, El Hierro Creek, ca. 17 km from Atenas, road to Orotina, 23.iii.1971, G. Rojas & C. Villalobos leg.—San José Province, Pacific drainage: 4 males, 2 females, UCR-MZ 717, San Isidro de Coronado, road to Coronado, 22.x.1970, D. Morales leg.; 2 males, UCR-MZ 773, San Isidro de Coronado, undated, L. Cruz M. leg.; male, holotype, USNM 19047, San José, La Mina, Torres River , 7.viii.1894, G.F. Tristan leg.; 1 male, USNM 20043, Pacaca [currently Villa Colón], Rodeo [approx. 09°56'N 84°16'W]; 5 females, UCR-MZ 639, San José, Hatillo, creek between El Verbena # 4 and Golonia [? Colonia] 15 Setiembre, 12.vii.1971, R.A. Cruz leg.; 1 male, UCR-MZ 644, Potrero Los Pinos, Los Pinos village, road to Alajuelita, 1.xii.1970, F. Rojas leg.; 1 male, UCR-MZ 658, La Presa, 100 m to the right of bridge over Tiribí River, road to Alajuelita, 19.ix.1970, J. Rojas leg.; 1 male, 1 female with young, 6 immat. females, CCDB 5017, stream in front of Finca El Rodeo, near Zona Protetora El Rodeo, 9°54’59.4”N 84°16’04.4”W, 824 m, 16.vii.2013, F.L. Carvalho, E.A. Souza-Carvalho & S.V. Esquivel-Montoya leg.; 1 male, 1 immat. female, CCDB 4888, Vila Colón, near Zona Protectora El Rodeo, 9°54’22.7”N 84°14’56.4”W, 820 m, 16.vii.2013, F.L. Carvalho, E.A. Souza-Carvalho & S.V. Esquivel-Montoya leg.; 2 males, INPA 2014, same data; 2 males, UCR-MZ 659, Piedades de Santa Ana, iv.1970, C. Villalobos leg.; 5 males, 1 female, UCR-MZ 665, same data; 1 male (cw 32.2, cl 20.8) 1 female (cw 29.1, cl 17.0), SMF 2820, 0.8 km W Piedades, small tributary to Virilla River (Grande de Tárcoles River drainage), 26.VI.1962, S.G. Smalley leg.; 1 male, 1 female, UCR-MZ 2285-01, Mora Catón, Marín, Tabarcia Creek, 12.iii.1999, B. Rodriguez leg.; 2 males, 4 immat. males, 1 female, 5 immat. female, UCR-MZ 645, Aurora Aguilar´s farm, 1.1 km on road to Guayabo, 26.ii.1972, F. Marin, R.A. Cruz & C.E. Villalobos leg.; 1 immat. male, UCR-MZ 686, Puriscal, Guayabo (Mora Canton), approx. 15 km S from Pequeño River, 17.iv.1971, F. Marin leg.; 1 male, UCR-MZ 1811-2, Puriscal Canton, La Palma Creek, 27.xi.1992, C. Marquez leg.; 2 males, INPA 1850, Puriscal Canton, drainage of Tusubres River, close to La Cangreja National Park, 16.iv.2004, leg. unknown; 2 males, 1 female, UCR-MZ 642, Pérez Zeledón Canton, San Isidro River, El Morazán de quebradas, 26.ii.1971, V. Juárez, C. Villalobos & R.A. Cruz leg.; 1 male, UCR-MZ 660, Mr. Thomas Creek, road of creeks to La Hortensia, 11.iii.1972, V. Juárez leg.; 2 males, 1 immat. male, UCR-MZ 668, La Pizota Creek, El Alto de quebradas, road to La Hortensia, 11.iii.1972, V. Juárez leg.; 1 male, 1 female, UCR-MZ 664, Pérez Zeledón Canton, Chimirol Creek, below bridge, road to Chimirol, 25.ii.1972, V. Juárez leg.; 1 male, UCR- MZ 725, La Carolina Creek , 23.iv.1972, V. Juárez leg.; 2 males, UCR-MZ 727, Santa Rosa Creek, road to Santa Rosa, 23.iv.1972, V. Juárez leg.; 1 male, 1 female, UCR-MZ 669, Pérez Zeledón Canton, Los Calderón Creek, 2.5 km of hanging bridge over General River, road to Rivas, 27.ii.1971, V. Juárez, C. Villalobos & R.A. Cruz leg.; 1 male, UCR-MZ 711, Pérez Zeledón Canton, Chirripó River, Los Gemelos, road from Rivas to General Viejo, 17.ii.1972, V. Juárez leg.; 1 male, UCR-MZ 670, Pérez Zeledón Canton, Grande Creek, 3.7 km on road to Rivas, bridge over General River, 27.ii.1971, V. Juárez, C. Villalobos & R.A. Cruz leg.; 4 males, UCR-MZ 726, Los Arias Creek, road from Santa Rosa to Savegre, 23.iv.1972, V. Juárez leg.; 4 males, UCR-MZ 730, La Cantina Creek, 1 km W de Santa Rosa, road to Savegre, 23.iv.1972, V. Juárez leg.; 1 male, 1 juv. male, UCR-MZ 731, Francisco Arias Creek, 2 km W de Santa Rosa, 23.iv.1972, V. Juárez leg.; 2 males, UCR-MZ 732, La Purruja [River?], camino a Savegre, 23.iv.1972, V. Juárez leg.; 2 males, UCR-MZ 734, Saúl Arias Creek, road Santa Rosa to Savegre, 23.iv.1972, V. Juárez leg.; 1 male, UCR-MZ 2651-01, Pérez Zeledón Canton, General Viejo Creek, 09°23’21.58”N 83°39’46.69”W, 13.ii.2007, L.R. Lara leg.; 1 male, 1 female, UCR-MZ 745, Pérez Zeledón Canton, Peñas Blancas River, approx. 50 m N bridge Trinidad to Montecarlo, 25.vii.1972, V. Juárez leg.; 4 males, 3 females, UCR-MZ 650, Pérez Zeledón Canton, Pedregoso River, bridge on road to La Palma, 30.i.1972, V. Juárez leg.; 2 males, UCR-MZ 667, Pérez Zeledón Canton, Pacuar River, 1 km E of La Palma, 30.i.1972, V. Juárez leg.; 3 males, 1 immat. male, 1 female, 3 juv. females, UCR-MZ 655, Pérez Zeledón Canton, La Palma, de La Bonita Creek, 6.5 km of San Isidro, on road to Dominical, 26.ii.1971, V. Juárez, C. Villalobos & R.A. Cruz leg.; 1 male, 1 immat. female, UCR-MZ 656, La Unión River, aprox. 50 m bridge on road from San Rafael to Fatima, 29.vii.1972, V. Juárez leg.; 2 males, 1 female, UCR-MZ 662, Pérez Zeledón Canton, Pavones Creek, road from San Rafael to Fatima, 29.vii.1972, V. Juárez leg.; 1 male, UCR-MZ 641, Pérez Zeledón Canton, Cajón River, on Interamericana highway, 24 km from San Isidro del General, 22.ii.1971, V. Juárez, C. Villalobos & R.A. Cruz leg.; 1 male, UCR- MZ 643, Pérez Zeledón Canton, creek aprox. 27 km from San Isidro del General, 28.ii.1971, V. Juárez, C.

Villalobos & R.A. Cruz leg.; 3 males, UCR-MZ 661, Pérez Zeledón Canton, General River, 14 km E from San Isidro del General, 31.i.1972, V. Juárez leg.; 1 immat. male, UCR-MZ 688, Pérez Zeledón Canton, Peñas Blancas River, 100 m of the junction of General River, 31.i.1972, V. Juárez leg.—Province Guanacaste, Pacific drainage: 1 male, UCR-MZ, Seco River, 10°09.318'N 84°43.470'W, 30.iv.2011, T. Poettinger & N. Thiercelin leg.; 1 male, UCR-MZ, Zamosa Creek, 10°08.187'N 84°43.428'W, T. Poettinger & N. Thiercelin leg.— Puntarenas Province, Pacific drainage: 1 male, INPA 1849, Carara Biological Reserve, small stream draining into Grande de Tárcoles River, 18.vi.1986, A.E. Smalley & Campo leg.; 1 male, INPA 1836, Buenos Aires Canton, Santa María, drainage of Cañas River, unnamed creek, 11.xi.2009, L.R. Lara leg.; 1 male, UCR-MZ 666, Canton Buenos Aires, Sonador River, 41 km SE of San Isidro, 30.xi.1971, V. Juárez leg.; 1 male, INPA 1851, Durika Creek, 9°15’03.564’N 83°15’19.764”W, 19.vi.2007, L.R. Lara leg.; 2 males, 1 female, UCR-MZ 663, Buenos Aires Canton, Cañas River, 50 km E of San Isidro del General, 5.xii.1971, V. Juárez leg.

Description of gonopod. Straight in mesiocaudal view. Marginal suture on mesial side, straight; marginal process rounded, not produced beyond distal border of apex, strongly bent to cephalic side. Mesial process large, subrectangular, ax-shaped. Lateral process long, approximately 60–70% of stem length (from proximal opening to caudal border of apex), clearly bilobed, lobes strongly asymetric, with distinct median concavity on caudal surface; lateral border with distinct median incision; proximal lobe slightly angled, distinctly smaller than distal lobe, with few to several scattered minute setae on caudal, lateral surfaces; distal lobe broadly rounded, usually tranversal, slightly thicker distally on cephalic surface, wider than lateral end of apex. Distocaudal ridge long (nearly reaching level of median depression of lateral process), narrow, well separated from the distal border of lateral process by distinct depression. Apex bent approximately 90° towards lateral side; oblong, narrow in distal view; caudal border with narrow notch near lateral end. Field of apical spines well developed, facing towards cephalolateral side.

Holotype and type locality. Male, cw 30.7, cl 18.1, USNM 19047. Costa Rica, San José Province, La Mina, Torres River , [a tributary of the Virilla River, probably near San José, 09°56’N, 84°05’W, according to Smalley (1964b)], north of San José (Pacific drainage).

Distribution. Central and southeastern Costa Rica, Alajuela, San José, and Puntarenas Provinces, Pacific drainage ( Fig. 83 ). Garcés (2002) reported the occurrence of Ptychophallus tristani (as Pseudothelphusa tristani ) from the San Félix River basin (Chiriquí Province, Panamá), but we were not able to confirm the identification of the specimens as they are no longer extant (H.A. Garcés, pers. comm. to CM). Another unconfirmed record of P. tristani from Panama was made from Fortuna Lake (Chiriquí River, Chiriquí Province) ( Anonymous 2005).

Remarks. Ptychophallus campylus was described by Pretzmann (1968) from a single male with a G1 closely resembling that of P. tristani in each having a large, subrectangular mesial process and asymmetrical lateral process. In P. c a m p yl us, however, the lateral process is narrower than the lateral end of the apex, and the distal lobe is not distinctly larger than the proximal one ( Fig. 41 ). Similar condition was also noticed in some other specimens (e.g. INPA 1853, Fig. 42 ; INPA 1851, Fig. 43 ; lot UCR-MZ 717 has one male with rather narrow distal lobe but it is wider in the remaining males). We prefer to consider P. campylus as a junior synonym of P. tristani for the time being because such differences could be due to intraspecific variation, but a reassessment of its taxonomic status might be necessary if additional collections indicate otherwise.

Figures

FIGURE 83. Distribution map of Ptychophallus tristani (Rathbun, 1896).

FIGURES 33 – 43. Ptychophallus micracanthus Rodríguez, 1994: 33, left first gonopod, holotype, USNM 240106, caudomesial view; 34, same data, latero-cephalic view of distal part. Ptychophallus montanus (Rathbun, 1898): 35, left first gonopod, lectotype, USNM 19486, caudo-mesial view; 36, same data, latero-cephalic view; 37, outline of left first gonopod, INPA 1843, caudo-mesial view; 38, same data, INPA 1847, caudo-mesial view. Ptychophallus tristani (Rathbun, 1896): 39, left first gonopod (partially damaged on proximal part), holotype, USNM 19047, caudo-mesial view; 40, same data, latero-cephalic view of distal part; 41, left first gonopod, holotype of Ptychophallus (Ptychophallus) campylus Pretzmann, 1968, NHMW 21849, caudo-mesial view; 42, outline of right gonopod, INPA 1836, caudo-mesial view; 43, outline of left first gonopod, INPA 1851, caudo-mesial view. Scale bars = 1 mm.