Achlidon agrestis Rathbun 1898
Creators: name: Magalhães, Célio
name: Wehrtmann, Ingo S.
name: Lara, Luis Rólier
name: Mantelatto, Fernando L.
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Decapoda
Pseudothelphusidae
Achlidon
Achlidon agrestis

description: Achlidon agrestis (Rathbun, 1898)
(Figs. 1–5, 77)
Pseudothelphusa agrestis Rathbun, 1898: 514, 532, fig. 2.— Young 1900: 212.— Rathbun 1904: 242 (in list).— Rathbun 1905: 285.— Coifmann 1939: 106 (in list).
Pseudothelphusa (Achlidon) agrestis — Smalley 1964b: 8.— Schmitt 1969: 105, fig. 6. Achlidon agrestis— Smalley 1970: 105, fig. 3.— Rodriguez 1982: 106.— Villalobos 1982: 220 (in list).— Villalobos Hiriart & Álvarez 2008: 295 (in list).
Potamocarcinus (Achlidon) agrestis — Pretzmann 1971: 20. Achlidon (Achlidon) agrestis — Pretzmann 1972: 82, figs. 429–432, 435–437.? Achlidon agrestis— Pretzmann 1980: 653.
Anchlidon agrestis [sic]— Ng et al. 2008: 173 (in list).
Material examined. COSTA RICA. Limón Province, Atlantic drainage: 1 male, 2 young, UCR-MZ, Road 232, Gonzalez creek, 10°09’45.0”N 83°56’15.0”W, 473 m, 29.i.2013, I.S. Wehrtmann et al.; 5 males, 2 females, UCR- MZ, Braulio Carrillo National Park, Road 232, 10°09’01.7”N 83°57’13.4”W, 675 m, 29.i.2013, I.S. Wehrtmann et al. leg.; 2 males, 1 female, INPA 2083, same data; 2 males, 1 female, CCDB 4556, same data; 1 male, 4 females, 1 female with young, UCR-MZ, Hondo River, Road 232, 10°05’32.2”N 83°25’02.9”W, 64 m, 29.i.2013, I.S. Wehrtmann et al. leg.; 2 males, NHMW 21827, Siquirres, Guayacán Farm, 40 km N Turrialba, 11.iii.1975, I. Poglayen-Neuwall leg.; 1 male, 2 females, UCR-MZ 757, Finca Guayacán, 11.ix.1976, R.A. Cruz leg.—San José Province: 2 males, UCR-MZ 716, Vásquez de Coronado Canton, Bajo de La Hondura, Laguna Farm, 22.iv.1972, H. Camacho leg.—Cartago Province: 1 male, holotype, USNM 19487, La Flor, farm near Torito, 900–1000 m, E. Fernández leg.; 1 male, 4 females, UCR-MZ 714, La Suiza, El Alto de Alemania Farm, km 4 NE road to Pacayitas, C. Villalobos, R.A. Cruz & Marín leg.; 1 male, 1 female, INPA 1870, same data; 2 males, UCR-MZ 715, La Suiza, 1 km NE on road to Pacayitas, ii.1971, C. Villalobos leg.
Description of gonopod. Slightly curved towards cephalic side on caudo-mesial view, narrower at end of proximal third. Marginal suture on mesial surface, not distorted to other surfaces. Distal portion of caudo-marginal projection unilobate, with slightly convex outline in mesial view. Marginal process (cephalic end of caudomarginal projection, sensu Villalobos & Alvarez, 2010) rounded, not produced beyond the mesial crest of apex. Mesial process weakly developed, as short, rounded protuberance. Distocaudal ridge elongated, extending distally from beginning of the second third of stem length. Apex elongated, narrow; mesial crest nearly straight, lateral crest slightly concave in apical view, both crests slightly convex in mesial view. Apex cavity situated distally, with both spermatic channel opening, field of apical spines positioned towards cephalic end; field of apical spines weakly developed.
Holotype and type locality. Male, cw 26.5, cl 15.8 (partially dearticulated), USNM 19487. Costa Rica, Cartago Province, between La Flor and Torito.
Distribution. Central Costa Rica, Atlantic drainage (Fig. 77).
Remarks. Pretzmann (1980: 653) recorded four females from Agua Buena River (NHMW 4017) but their identification is doubtful because other pseudothelphusid species are recorded from the same area (e.g. Allacanthos pittieri, see below).
description: Published as part of 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), pp. 301-344 in Zootaxa 3905 (3) on pages 303-304, DOI: 10.5281/zenodo.235127