Revision of the Southeast Asian potamid crabs of the genus Malayopotamon Bott, 1968 (Crustacea: Decapoda: Brachyura)

Abstract

Malayopotamon Bott, 1968, a genus of potamid freshwater crabs from Sumatra and Java in Southeast Asia, is revised, and new generic characters are diagnosed. Ten species are now recognized in the genus, of which two are new species, from Sumatra. Malayopotamon brevimarginatum javanense (Bott, 1968) is recognized as a full species, M. gestroi (Nobili, 1900) is re-established as a valid species and Potamon sumatrense Miers, 1880, is referred to the genus for the first time. Diagnoses are presented for all species and a key presented for all the taxa.