A new species of freshwater crab of the genus Potamocarcinus H. Milne Edwards, 1853 (Crustacea: Decapoda: Brachyura: Pseudothelphusidae) from Panama

摘要

A new species of freshwater crab from Panama of the genus Potamocarcinus H. Milne Edwards, P. lobulatus, is described and illustrated, bringing to 11 the total number of known species in the genus. The new species is distinguished from other congeners by the morphology of the male first gonopod, especially the presence on the cephalic surface of a prominent and wide distal lobe, and a deep, transverse depression narrowing the spermatic channel.