(Fabricius, 1798)
The superior margin of the cheliped palm has a carina. The anterior lobe of the antero-lateral margins of the carapace is separated by a hiatus from the exorbital angle. The anterior lobe of the carapace antero-lateral margins is not advanced beyond the exorbital angle. The chelipeds have the external face of the palm smooth or punctate, but without longitudinal crests. The dorsal surface of the carapace is feebly lobate, smooth and glabrous; the sternum is smooth. The antero-lateral margins of the carapace have a rounded anterior lobe; the following lobe is subtriangular; the two following teeth are triangular, more projecting and carinate, the last is the smallest. The cheliped palm has a strong crest on the superior margin and the external face is smooth and unarmed. The ambulatory legs are broad with an elevated crest on the superior margin; the merus of P5 is 1.45 times longer than broad. The first pleopod of the male has been figured by Forest & Guinot (1961, fig. 40). (Serène, 1984)
Type locality: unknown.
Range: Japan - Sagami Bay, Amami-shoto, and Yaeyama-retto (Sakai, 1976a); north-eastern Taiwan (Ng & Chia, 1997); China - Hainan Island (Dai & Yang, 1991), Paracel Islands and Hainan Island (Ng & Chia, 1997); Vietnam - Condore and Cape St. Jacques (Ng & Chia, 1997); Gulf of Thailand (Ng & Chia, 1997); Singapore (Alcock, 1898, Ng & Chia, 1997); Philippines - Cebu (Ng & Chia, 1997); Indonesia - Java, Ambon, and Pulau Rambut (Ng & Chia, 1997); Australia - Cape Jaubert (Rathbun, 1924c); Fiji; Samoa.