Descriptions of five new species of false spider crabs (Decapoda: Brachyura: Hymenosomatidae) from the Philippines

Abstract

Five new species of the family Hymenosomatidae are described from the central Philippines. Amarinus abatan, new species, is compared with its congeners, especially with the morphologically similar A. crenulatus, A. wolterecki, and A. pumilus, but the new species is distinguished by differences in the rostrum, carapace, third maxillipeds, ambulatory legs, and male pleopods. Two new species related to Elamena truncata differ from that species and from each other by the shape of the carapace and the relative lengths of the ambulatory legs. Two new Neorhynchoplax species are similarly differentiated from congeners and each other by the differing shapes of their rostrum, carapace, and ambulatory legs.