Pseudothelphusa zongolicae (Decapoda, Pseudothelphusidae), a new species of freshwater crab from Veracruz, Mexico

A new species of freshwater crab of the family Pseudothelphusidae from Zongolica, Veracruz, Mexico, is described. Only one previous report exists of a pseudothelphusid crab from the Zongolica region in central Veracruz, but that one belongs to a different tribe. The new species is placed in the genus Pseudothelphusa due to the evident torsion of the male gonopod and to the presence of the typical reniform caudo-marginal projection of Pseudothelphusa. The new species can be distinguished from its congeners by a gonopod with a caudo-marginal projection with a single large lobe, which extends proximally to reach beyond the middle of the gonopod’s principal axis, and a conical prominence with terminal pore setae on the distal crest of the caudo-lateral surface. The new species represents the 26th species of the genus with affinities with species from the Pacific versant of Mexico.