Terrapotamon gen. nov., a new genus of freshwater crabs from Malaysia and Thailand, with description of a new species, Terrapotamon aipooae sp. nov. (Crustacea: Decapoda: Brachyura: Potamidae)

Abstract

A new genus, Terrapotamon gen. nov., is established to accomodate two species of freshwater crabs, Potamon abbotti Rathbun, 1898 from southern Thailand, and a new species, Terrapotamon aipooae sp. nov. from West Malaysia. Members of this genus are characterized by their inflated carapaces, very acutely triangular external orbital angles, and structure of their first male gonopods.