Ptychophallus lavallensis Pretzmann, 1978

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 : 313-314

Ptychophallus lavallensis Pretzmann, 1978

( Figs. 31, 32 , 78 )

Ptychophallus (Ptychophallus) exilipes lavallensis Pretzmann, 1978: 1 .— Pretzmann 1980: 651, pl. 1, figs. 1–5. Ptychophallus lavallensis — Rodríguez 1994: 304, fig. 3I –J.— Campos & Lemaitre 1999: 560 (map).— Rodríguez & Hedström 2000: 424.— Ng et al. 2008: 176 (in list).— Villalobos Hiriart & Álvarez 2008: 297 (in list).

Material examined. PANAMA. Colón Province, Atlantic drainage: 1 male, USNM 184338, El Aguacate, 22.ii.1973, leg. unknown; 1 male, USNM 184339, El Aguacate, 22.ii.1973, leg. unknown.— Panamá Province, Pacific drainage: 2 males, INPA 1711, 1 juv. male, CCDB 2660, Capira River, 2.viii.2008, L.S. Torati leg.—Coclé Province, Pacific drainage: 3 males, USNM 240100, creek at headwaters of Indio River, above El Valle, 14.ix.1962, H. Loftin et al. leg.; male, holotype, NHMW 4002, brook above El Valle, 670 m, 2.ii.1975, I. Poglayen-Neuwall leg.; 4 females, paratypes, NHMW 4002, same data.

Description of gonopod. Straight in mesiocaudal view, apex strongly bent over 90° in laterocephalic direction. Marginal suture on mesial side, straight; marginal process rounded, not produced beyond caudal border of apex. Mesial process small, subtriangular, downturned. Lateral process well developed, broadly subtriangular, undivided, approximately 70% of stem length (from proximal opening to caudal border of apex), much wider than lateral end of apex; lateral border distinctly convex, proximal, distal lobes indistinct. Distocaudal ridge short, weakly developed, not well separated from the distal border of lateral process. Apex oblong, narrow; caudal border nearly straight, with small notch at or near lateral end. Field of apical spines well developed, facing towards lateral side.

Holotype and type locality. Male, cw 31.2, cl 18.7, NHMW 4002. Panama, Coclé Province, near El Valle (Pacific drainage).

Distribution. The few records available suggest that the species is distributed in central Panama, in both Atlantic and Pacific drainages ( Fig. 78 ).

Remarks. This species is very closely related to P. exilipes , and their possible differences were discussed under the remarks of the latter species.

Figures

FIGURE 78. Distribution map of Ptychophallus cocleensis Pretzmann, 1965, P. lavallensis Pretzmann, 1978, and P. micracanthus Rodríguez, 1994.

FIGURES 22 – 32. Ptychophallus exilipes (Rathbun, 1898): 22, left first gonopod, USNM 39089, caudo-mesial view; 23, same data, latero-cephalic view of distal part; 24 – 26, outline of right first gonopod from three males of UCR-MZ 741, caudo-mesial view; 27, outline of right first gonopod, USNM 39096, caudo-mesial view; 28, same data, INPA 1857, caudo-mesial view; 29, outline of left first gonopod, SMF 36265, caudo-mesial view; 30, same data, SMF 36264, caudo-mesial view. Ptychophallus lavallensis Pretzmann, 1978: 31, left first gonopod, holotype, NHMW 4002, caudo-mesial view; 32, latero-cephalic view. Scale bars = 1 mm.