identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
038E87ADFF93FFA8FF2CFDBFFED9D5CF.text	038E87ADFF93FFA8FF2CFDBFFED9D5CF.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Chaceus guajiraensis Campos & Puerta 2023	<div><p>Chaceus guajiraensis, new species</p><p>(Figs. 1–3)</p><p>Material examined. Holotype. Male (cl 15.4 mm, cw 26.1 mm), ICN-CR 3576 Colombia, La Guajira Department, Municipio Fonseca, corregimiento <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-72.731026&amp;materialsCitation.latitude=10.723694" title="Search Plazi for locations around (long -72.731026/lat 10.723694)">Conejo</a>, vereda <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-72.731026&amp;materialsCitation.latitude=10.723694" title="Search Plazi for locations around (long -72.731026/lat 10.723694)">Las Colonias</a>, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-72.731026&amp;materialsCitation.latitude=10.723694" title="Search Plazi for locations around (long -72.731026/lat 10.723694)">Regional Natural Park Serranía de Perijá</a>, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-72.731026&amp;materialsCitation.latitude=10.723694" title="Search Plazi for locations around (long -72.731026/lat 10.723694)">Los Saltos Creek</a>, elevation 980 m, 10°43’25.3”N, 72°43’51.7”W, 3 Dec 2022, leg. Darío A. Puerta. Paratypes. 2 males (cl 14.3 mm, 16.2 mm, cw 23.9 mm, 27.4 mm), 2 juveniles, ICN-CR 3577, same locality data as for holotype .</p><p>Additional material examined: Colombia, La Guajira Department, Municipio Fonseca, corregimiento Conejo, vereda <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-72.72855&amp;materialsCitation.latitude=10.719972" title="Search Plazi for locations around (long -72.72855/lat 10.719972)">Las Colonias</a>, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-72.72855&amp;materialsCitation.latitude=10.719972" title="Search Plazi for locations around (long -72.72855/lat 10.719972)">Regional Natural Park Serranía de Perijá</a>, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-72.72855&amp;materialsCitation.latitude=10.719972" title="Search Plazi for locations around (long -72.72855/lat 10.719972)">Los Saltos Creek</a>, elevation 1320 m, 10°43’11.9”N, 72°43’42.8”W, 14 Feb 2023, leg. Darío A. Puerta, 2 males (cl 16.4 mm, 16.6 mm, cw 28.1mm, 28.4 mm), 2 females (cl 16.6 mm, 17.2 mm, cw 28.6 mm, 29.0 mm), ICN-CR 3578 .</p><p>Diagnosis. First male gonopod with lateral process lanceolate, borders thickened, outer margin festooned, caudal surface rough with a conspicuous ridge on lateral side, concave internal, failing to reach apex of gonopod; apex with mesial process rounded basally, cylindrical, rounded distally, directed cephalically; marginal process narrow, elongated, half turn twisted in cephalad direction, with acute ending, and juxtaposed to mesial process on caudal surface; apex semicircular distally. Third maxilliped with exopod 0.60–0.62 times length of ischium; orifice of efferent branchial channel ovate and completely closed by spine of jugal angle and extensions of lateral lobe of epistome.</p><p>Description of holotype. Carapace (Fig. 1A) with straight, narrow, shallow cervical grooves, ending near lateral margin; antero-lateral margins with shallow depression behind outer orbital angle, devoid of papillae before cervical grooves; lateral margins with approximately 15 tubercles, diminishing in size posteriorly; postfrontal lobes low, oval; median groove shallow, narrow; front lacking distinct upper border, frontal area regularly sloping downwards, bilobed in dorsal view, lower margin sinuous in frontal view, visible in dorsal view, conspicuously thickened; lower orbital margins each fringed with tubercles (Fig. 2B); epistome narrow, lower margin moderately arched, epistomial tooth inconspicuous, rounded distally; buccal frame sub-square; pterygostomial region pubescent, devoid of papillae; thoracic sternum ovate, bent anteriorly. Third maxilliped with external margin of merus nearly straight, exopod 0.60 times length of ischium (Fig. 1E). Orifice of efferent branchial channel ovate, completely closed by spine of jugal angle and extensions of lateral lobe of epistome (Fig.1B, C).</p><p>First pereopods heterochelous (Fig. 1A); right cheliped larger than left, merus with 3 crests as follows: upper crest with rows of tubercles of different sizes, internal lower crest with 2 tight rows of large tubercles, diminishing in size proximally, external lower crest with row of papillae; carpus with blunt subdistal spine, followed by 4 rounded tubercles; palms of both chelipeds smooth, palm of larger (right) cheliped strongly swollen, fingers 1.3 length of palm, gaping when closed, tips crossing (Fig. 1A, D); palm of smaller cheliped moderately swollen, fingers 1.2 length of palm, not gaping when closed, tips crossing. Walking legs (second to fifth pereopods) slender (Fig. 1A), dactyli each about 1.2 times as long as propodi, with 5 longitudinal rows of large spines diminishing in size proximally, arrangement of spines on dactylus of left second pereopod as follows: antero-lateral, antero-ventral rows each with 5 spines, external row with 5 spines, 2 proximal papillae, posteroventral, posterolateral rows each with 4 spines.</p><p>Episternites sub-triangular, partially fused with sternites, suture lines well defined, extended to mesial region; sterno-abdominal cavity concave, midline of sternum short, deep, restricted to sternite VIII, sternites V, VI with a shallow concavity that receive distal processes of G1; abdomen subtriangular, margin with fine pubescence, somites well-differentiated, suture lines nearly straight, first abdominal segment narrow, increasing in size towards 6; telson subtriangular, margin smooth, pubescent; dorsal surface of carapace smooth, covered by small papillae, regions not well demarcated.</p><p>G 1 in caudal view, recurved in caudocephalic direction, lateral side expanded with rounded protuberance in the mid-basal portion. Lateral process lanceolate, concave internally, borders thickened, outer margin festooned, caudal surface rough with conspicuous ridge on lateral side, directed distally in caudal view and failing to reach apex of gonopod. Mesial process rounded basally, cylindrical, rounded distally, directed cephalically. Marginal process narrow, elongated, half turn twisted in cephalad direction with acute ending (Fig. 2A–D). Apex consists of mesial cylindrical process and narrow, elongated marginal process. Mesial and marginal processes not surrounded by lateral process in distal view; distal orifice of spermatic channel surrounded by few minute spines (Fig. 2E); mid-basal portion with distinct lateral protuberance bearing rows of long plumose setae; mesial side with spinules. Marginal suture situated along caudal surface, slightly sinuous, with conspicuous long setae along proximal portion (Fig. 2A). Lateral suture incomplete, marked by distinct sulcus on proximal half of caudal side extending as a low ridge along lateral process (Fig. 2A).</p><p>Colouration. The freshly-alcohol preserved holotype is beige (near Tawny Olive, 223D) with brown triangular design anteriorly and circular posteriorly (near Verona Brown, 223B) on the dorsal surface of the carapace. The walking legs are brown dorsally and ventrally (near Mars Brown, 223A). The chelae are beige dorsally and ventrally (near Tawny Olive, 223D). The ventral surface of the carapace is light brown (near Sayal Brown, 223C).</p><p>Habitat. The specimens were collected by hand under the rocks and leaf litter in Los Saltos Creek. The stream was surrounded by a gallery forest and the water was characterized as crystal clear with sandy-clay soil and limestone substrate. The biome is a Tropical dry forest with a transition to the Andean Forest.</p><p>Etymology. The species is named after La Guajira Department where the type locality of the new species was found.</p><p>Remarks. Chaceus guajiraensis n. sp. shows similarity in the shape of the G1 to Chaceus turikensis Rodríguez &amp; Herrera, 1994 (see Rodríguez &amp; Herrera 1994: figs. 2A–E). The main distinguishing features between the two species for their G1 are (1) in C. guajiraensis n. sp. the lateral process is lanceolate and concave internally, the borders are thickened, and the outer margin is festooned, the caudal surface is rough with a conspicuous ridge on the lateral side, directed distally in caudal view, not reaching the apex of gonopod (Fig. 2A–E); C. turikensis has a well-developed lateral process, foliose, implanted transversely to the main axis of the appendage in caudal view with a conspicuous row of stout spines on the lateral side, reaching the apex of the gonopod (Rodríguez &amp; Herrera 1994: fig. 2A, C); (2) the mesial process is cylindrical in C. guajiraensis n. sp. (Fig. 3A–E), whereas it is ellipsoidal in C. turikensis (Rodríguez &amp; Herrera 1994, fig. 2A, C); (3) the marginal process is narrow and elongated in C. guajiraensis n. sp. (Fig. 3A–E), whereas it is triangular in C. turikensis (Rodríguez &amp; Herrera 1994: fig. 2A, C). The two species also differed in the length of the exopod of the third maxilliped, which is 0.60 to 0.62 in C. guajiraensis n. sp. (Fig. 2E) and 0.77 in C. turikensis (Rodríguez &amp; Herrera 1994: fig. 2D); in C. guajiraensis n. sp. (Fig. 1C) the orifice of the efferent branchial channel is completely closed by the spine of jugal angle and the extensions of the lateral lobe of the epistome; in C. turikensis (Rodríguez &amp; Herrera 1994: fig. 2E) it is not completely closed. Until now C haceus guajiraensis n. sp. was found in epigean environments, while C. turikensis specimens were collected most of the time in caves and in the Apón River in epigean environments.</p><p>Rodriìguez (1982) theorized about the possible derivation of the genus, Hypolobocera Ortmann, 1897, from an ancestral Chaceus, based on the homology of the finger-like mesial processes in Chaceus and the triangular caudal processes with the two papillae found near the spermatic channel in Hypolobocera . The morphology of the first male gonopod in Chaceus davidi supports this theory since the mesial and the caudal processes are surrounded by a ridge that resembles the apex shape in the species of Hypolobocera (Rodriìguez &amp; Campos 1989) . In addition, a recent robust molecular phylogeny reconstructed by Álvarez et al. (2021) corroborates this morphological hypothesis and the close relationship with genera Strengeriana Pretzmann, 1971, Neostrengeria Pretzmann, 1965, and Moritschus Pretzmann, 1965 .</p></div>	https://treatment.plazi.org/id/038E87ADFF93FFA8FF2CFDBFFED9D5CF	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		MagnoliaPress via Plazi	Campos, Martha R.;Puerta, Dario A.	Campos, Martha R., Puerta, Dario A. (2023): A new species of freshwater crab of the genus Chaceus Pretzmann, 1965 (Brachyura: Decapoda: Pseudothelphusidae) from La Guajira, including distribution and a key to the species of the genus. Zootaxa 5306 (4): 463-472, DOI: 10.11646/zootaxa.5306.4.4, URL: https://doi.org/10.11646/zootaxa.5306.4.4
038E87ADFF97FFAAFF2CFB0BFA19D7E9.text	038E87ADFF97FFAAFF2CFB0BFA19D7E9.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Chaceus Pretzmann 1965	<div><p>Distribution of the genus Chaceus Pretzmann, 1965</p><p>The geographical distributional pattern of the genus Chaceus extends to the eastern and western slopes of the Serranía de Perijá and the Sierra Nevada de Santa Marta, as follows: On the eastern slope, we found the following species: Chaceus caecus Rodríguez &amp; Bosque, 1990, C. motiloni Rodríguez, 1980, and C. turikensis Rodríguez &amp; Herrera, 1994 . Chaceus caecus specimens were collected in the Serranía de Perijá of Venezuela, Zulia State, in caves such as the Punto Fijo, El Samán, Los Laureles, El Sumidero at an altitude range between 470 to 900 m, all in Venezuela, associated with caves linked to karst formations in boxed valleys that classify the species as stygobionts. Chaceus motiloni, where the type material was collected in Negro River, Kunaná, Zulia, at an altitude of 1100 m, also found in Punto Fijo cave, but only in part of the cave where light prevails during the day time (the entrance and twilight zones), at an altitude of 590 m, is classified as stygophile species. Chaceus motiloni and C. caecus resemble each other in the shape of the digitiform mesial process and marginal process as a basal triangular spine. The lateral process is orbicular in both cases but shows in C. motiloni as a marked basal constriction, absent in C. caecus (see Rodríguez &amp; Bosque 1990: figs. 3A, B, G). Chaceus motiloni may be considered the most probable sister species of C. caecus (Rodriguez &amp; Bosque, 1990) . Chaceus turikensis specimens were collected in the Serranía de Perijá of Venezuela, Zulia State, in Mesa Turik, a flat top mountain, in caves such as Las Lianas, Pared Norte, del Río, Laberinto, and the Apón River, at an altitude range between 1700 to 1800 m. The stygophile characters in C. turikensis are fully developed only in adults and consist of slender pereiopods, chelipeds, and diminished and depigmented corneas (Rodríguez &amp; Herrera 1994). Chaceus turikensis is not restricted to caves, since the crabs collected in the Apón River were epigeous.</p><p>Chaceus turikensis was recorded on the eastern slope of the Serranía de Perijá of Venezuela on the Mesa Turik, located at the headwaters of the Apón and Palmar rivers in a series of caves with elevations between 1700 and 1800 m, and unevenness ranging from La Liana cave (30 m) to the Pared Norte cave (160 m), linked to extensive limestone outcrops of the Cogollo Group of the Lower Cretaceous age (Group constituted by the formations Apón—Aptian/ Albian (Sutton 1946) of the formations Lisure—middle to upper Albian, and Maraca—Albian (Rod &amp; Maync 1954). Limestones are linked to karst systems associated with mountain systems of steep slopes and structural profiles with deep valleys and in the Mesa Turik (García et al. 1992). Only the Cogollo Group is present, and the karstification is developed in the Maraca Formation which is the youngest unit of the group. Chaceus guajiraensis is known from the western slope of the Serranía de Perijá of Colombia, in the rural area of Fonseca, in the waterfall Los Saltos at an altitude between 980 and 1320 m. The basalts of the territories are sandstones, siltstones, and limestones intercalated with tuffs, breccias, agglomerates, and rhyolitic to andesitic lavas (J1J2-VCct). These territories seem to be associated with the flanks of a deformation front that generates topographies with excessively steep slopes. Both species were found very close to the dividing line of the eastern (Venezuela) and western (Colombia) slopes of the Serranía de Perijá, at a rough distance of 40 km one from each other. In addition, the prototype specimens were in sedimentary materials of the Jurassic and Lower Cretaceous ages. Chaceus cesarensis Rodríguez &amp; Viloria, 1992, was recorded in the central part of the mountain range and has the highest altitude (2150 m). Chaceus ibiricensis Campos &amp; Valencia, 2004 and C. curumanensis Campos &amp; Valencia, 2004 are distributed in the southern part of the western slope, the first one at an altitude range between 1100 to 1400 m. The second species with unique records from Curumaní is known from an altitude of 100 m (Fig. 4, Table 1).</p><p>The establishment of the genus Chaceus in the Sierra Nevada de Santa Marta (SNSM) was probably due to the displacement of a paleo SNSM on the Bucaramanga—Santa Marta fault from the south to the north. This geological movement, with an approximate displacement of 100 km on the fault plane carries the species to the current location in the high mountainous area (Tschanz et al. 1974), allowing the emergence of the species C. pearsei (Rathbun, 1915) . Chaceus davidi Campos &amp; Rodríguez, 1984, and C. nasutus Rodríguez,1980 . Chaceus pearsei is widely distributed in the SNSM in an altitudinal range of 600 to 1580 m. Chaceus davidi is restricted to the “Ciudad Perdida” area in an altitudinal range between 800 and 1000 m, and C. nasutus registers the highest altitudinal range in the SNSM reaching between 1580 and 3000 m. To date in Colombia, only species from epigean environments have been recorded. It may be due to the lack of explorations in the western slopes of the Serranía de Perijá, particularly because of the public order problems in a large part of this territory.</p><p>The stygobiont species may exhibit some differences concerning the stygophile ones, for example, a wider and depigmented carapace; longer and slender pereiopods; reduced length of ocular peduncles that do not fully occupy the orbital cavity; diminished and depigmented corneas (Rodríguez &amp; Bosque 1990).</p><p>Key to the species of Chaceus Pretzmann, 1965</p><p>1. Lateral process of first male gonopod well developed......................................................... 2</p><p>- Lateral process of first male gonopod reduced (Campos 2014: fig. 98D).............................. Chaceus nasutus</p><p>2. Lateral process of first male gonopod not overreaching the apex................................................ 3</p><p>- Lateral process of first male gonopod reaching or overreaching the apex.......................................... 4</p><p>3. Lateral process of first male gonopod rounded or lanceolate in caudal view....................................... 8</p><p>- Lateral process of first male gonopod subtriangular or elongated in caudal view.................................... 5</p><p>4. Lateral process of first male gonopod with basal semicircular notch on lateral surface (Campos 2014: fig. 90B)...................................................................................................... C. cesarensis</p><p>- Lateral process of first male gonopod lacking semicircular notch (Campos 2014: figs. 96D, E).............. C. ibiricensis</p><p>5. Mesial process of first male gonopod longer than marginal process.............................................. 6</p><p>- Mesial process of first male gonopod as long as marginal process (Campos 2014: figs. 94D, E).................. C. davidi</p><p>6. Mesial process of first male gonopod ellipsoidal (Rodríguez &amp; Herrera 1994: fig. 2A)..................... C. turikensis</p><p>- Mesial process of first male gonopod cylindrical or finger-like................................................. 7</p><p>7. Mesial process of first male gonopod finger-like (Campos 2014: fig. 100E)................................ C. pearsei</p><p>- Mesial process of first male gonopod needle-shaped (Campos 2014: figs. 92D, E)...................... C. curumanensis</p><p>8. Lateral process of first male gonopod orbicular.............................................................. 9</p><p>- Lateral process of first male gonopod lanceolate (Fig. 3B, C)................................... C. guajiraensis n. sp.</p><p>9. Lateral process of first male gonopod with marked basal constriction (Rodríguez 1982: figs. 14A, B)........... C. motiloni</p><p>- Lateral process of first male gonopod without basal constriction (Rodríguez &amp; Bosque 1990: figs. 3A, B)........ C. caecus</p></div>	https://treatment.plazi.org/id/038E87ADFF97FFAAFF2CFB0BFA19D7E9	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		MagnoliaPress via Plazi	Campos, Martha R.;Puerta, Dario A.	Campos, Martha R., Puerta, Dario A. (2023): A new species of freshwater crab of the genus Chaceus Pretzmann, 1965 (Brachyura: Decapoda: Pseudothelphusidae) from La Guajira, including distribution and a key to the species of the genus. Zootaxa 5306 (4): 463-472, DOI: 10.11646/zootaxa.5306.4.4, URL: https://doi.org/10.11646/zootaxa.5306.4.4
