A new species of Elamenopsis from Papua, Indonesia (Decapoda, Brachyura, Hymenosomatidae)

in Crustaceana
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Abstract

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.

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References
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Figures
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    Elamenopsis gracilipes n. sp., holotype male, 2.5 × 2.0 mm (MZB), general habitus.

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    A-M, Elamenopsis gracilipes n. sp., holotype male, 2.5 × 2.0 mm (MZB); N, E. ariakensis (Sakai, 1969), male, 3.5 × 2.8 mm (ZRC); O, E. comosa Ng & Chuang, 1996, holotype male, 2.7 × 2.3 mm (ZRC 1994.4244); P, E. lineata A. Milne-Edwards, 1873, male, 3.2 × 2.3 mm (ZRC 2006.0095). A, Carapace; B, front and ocular peduncle; C, right third maxilliped; D, major chela, E, minor chela; F-I, first to fourth ambulatory legs, respectively; J, male pleon; K, female pleon; L, right G1, dorsal view; M, right G1, ventral view; N-P, fourth ambulatory leg. Scales, A, B, D-J, N-P = 0.5 mm; C, K-M = 0.25 mm.

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