de Haan, 1839
Anterior part of carapace not so strongly tapered from hepatic region to constriction behind rostral lobes; gastric region circular and very convex, its median posterior part faintly demarcated from the remaining greater part, cardiac region also isolated and rather distinctly bifid at the summit; rostral lobes weak, triangular not dorso-ventrally flattened, lobes divergent, interorbital region only concealing basal part of unretracted eyestalk. Chelipeds slender, merus fringed with a row of longish stout setae along both borders; palm not swollen and slightly shorter than the fingers. First pleopod of male strongly widened before apex, with a beak-like lateral lobe subapically; female gonopore distinctly elevated and opening medially. (Türkay 1995)
Type locality: Japan.
Range: Seychelles and Cargados Carajos (Rathbun, 1911); Laccadives (Alcock, 1895a); Maldives - (Alcock, 1895a), Nallandu (Rathbun, 1902b); Sri Lanka (Alcock, 1895a); Andamans (Alcock, 1895a); Malay Peninsula (Alcock, 1895a); Japan - (de Haan, 1839), Kagoshima (Ortmann, 1893), west of Suno-saki (Yokoya, 1933), Shimoda (Sakai, 1935), Tateyama Bay, Misaki, Shimoda, Nanki Shirahama, Ibusuki, and Nagasaki (Sakai, 1938a), Sagami Bay (Sakai, 1965b), Tokyo Bay, Sagami Bay, Shimoda, Kii Nagashima, and Kii Minabe (Sakai, 1976a), Shiono-misaki (Takeda, 1979a), Tosa Bay (Muraoka, 1998); Philippines - north of Lubang Island (Serène & Vadon, 1981); Sulu Archipelago - off North Ubian and off Jolo (Griffin & Tranter, 1986a); Indonesia - Moluccas Passage (Miers, 1886), Lesser Sunda Islands, Selat Sunda, Selat Bali, Flores Sea, Seram, and Kepulauan Kai (Griffin & Tranter, 1986a); Arafura Sea (Miers, 1886); Australia - southern Australian coast (Miers, 1886), Moreton Bay and Saumarez Reef, Queensland (Griffin & Tranter, 1986a); Hawaiian Islands - Kauai and Modu Manu (Rathbun, 1906); 3-400 m.