A NEW SPECIES OF ELAMENOPSIS FROM PAPUA, INDONESIA (DECAPODA, BRACHYURA, HYMENOSOMATIDAE)

Elamenopsis gracilipes n. sp. is described from Papua, Indonesia, and is easily distinguished from congeners by its relatively longer and more slender ambulatory legs, with the merus of the third ambulatory leg almost seven times as long as broad. The new species superficially most closely resembles E. lineata A. Milne-Edwards, 1873, in having male pleonal somites 4 and 5 fused and the male first gonopod straight with the distal portion slightly curved. The two species differ in the shapes of their rostrums, as well as in the proportions of the carapace and fourth ambulatory meri. A revised key to all the species in the genus is provided.