Ptychophallus kuna Campos & Lemaitre, 1999

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

Ptychophallus kuna Campos & Lemaitre, 1999

( Figs. 20, 21 , 81 )

Ptychophallus kuna Campos & Lemaitre, 1999: 555 , figs. 3–5.— Rodríguez & Magalhães 2005: 356 (table I).— Rodríguez & Hedström 2000: 423.— Ng et al., 2008: 176.— Villalobos Hiriart & Álvarez 2008: 297 (in list).

Material examined. PANAMA. Colón Province: male, holotype, USNM 184340, Portobelo, 26.ii.1973, leg. unknown.

Description of gonopod. Straight in mesiocaudal view, apex bent approximately 80° in laterocephalic direction. Marginal suture on mesial side, straight; marginal process short, rounded, not produced beyond distal border of apex. Mesial process small, subtriangular, slightly downturned. Lateral process relatively short, 58% of stem length (from proximal opening to caudal border of apex), distinctly shorter than lateral end of apex, with depression around middle; lateral border with wide, deep median notch, proximal lobe with irregular border, distal lobe slightly thicker distally. Distocaudal ridge short, narrow, weakly developed, barely separated from distal border of the lateral process by shallow depression. Apex oblong, narrow; caudal border distinctly convex in mesiocaudal view, with narrow notch near lateral end. Field of apical spines well developed, facing towards cephalolateral side.

Holotype and type locality. Male, cw 24.9, cl 15.6, USNM 184340 (specimen not in good condition, dismembered, carapace partially detached from the body). Panama, Colón Province, Portobelo (Atlantic drainage).

Distribution. So far known only from the type locality in northern Panama, Atlantic drainage ( Fig. 81 ).

Remarks. The G1 morphology of the species has a close resemblance with that of P. montanus , but they can be distinguished by the inclination angle of the apex, the shape of the lateral process, and the distocaudal ridge (see Campos & Lemaitre, 1999). In P. kuna the apex is less than 90° bent cephallad, the lateral process is distinctly shorter than the lateral end of apex, and the distocaudal ridge is weakly developed, in contrast to an apex of 90° bent cephallad, lateral process as wide as lateral end of apex, and the distocaudal ridge is well developed in P. montanus . An assessment about the morphological variability of the P. kuna ’s G1 is nevertheless not possible because the species is known only from the holotype, and the diagnostic characters may be due to the subadult condition of the specimen. The taxonomic status of the present species should be re-evaluated when new collections from central Panama become available.

Figures

FIGURE 81. Distribution map of Ptychophallus goldmanni Pretzmann, 1965, and P. kuna Campos & Lemaitre, 1999.

FIGURES 10 – 21. Ptychophallus colombianus (Rathbun 1896): 10, left first gonopod, INPA 1845, caudo-mesial view; 11, same data, latero-cephalic view of distal part; 12, outline of left first gonopod, INPA 1654, caudo-mesial view; 13, same data, INPA 1659; 14, same data, NHMW 4001. Ptychophallus costaricensis Villalobos, 1974: 15, right first gonopod, paratype, UCR-MZ 719, latero-cephalic view of distal part; 16, same data, caudo-mesial view. Ptychophallus goldmanni Pretzmann, 1965: 17, left first gonopod, holotype, USNM 54044, caudo-mesial view; 18, same data, cephalic-apical view of distal part; 19, same data, latero-cephalic view of distal part. Ptychophallus kuna Campos & Lemaitre, 1999: 20, left first gonopod, holotype, USNM 184340, latero-cephalic view of distal part; 21, same data, caudo-mesial view (dr, disto-caudal ridge; lp, lateral process; me, mesial process; mp, marginal process). Scale bars = 1 mm.