A new species of freshwater crab of the genus Odontothelphusa Rodriguez, 1982, (Crustacea: Decapoda: Pseudothelphusidae) from Chiapas, Mexico

摘要

A new species of freshwater crab of the genus Odontothelphusa is described. The specimens were collected from one tributary of the Malpaso Dam in northwestern Chiapas state, extending the geographical distribution of the genus to southwestern Mexico.The new species differs from its congeners by the presence of a basal rounded tubercle and a small acute spine near the pointed end of the strong proximomesial spine. The new species represents the seventh species in the genus.