(Stimpson, 1858)
Carapace moderately broad (breadth about 1.8 times length); surface with widely spaced granular areas being separated by regions with a dense pubescence; regions well recognizable; front with 4 lobes, medians acute, laterals right-angled and much broader; antero-lateral borders with 9 teeth, last one much the longest, directed outwards; postero-lateral junction rounded. Antero-external angle of merus of third maxillipeds markedly produced into a lobe. Chelipeds stout; merus with 2 spines at posterior border, anterior border with 4 spines; carpus with 2 spines of normal length; upper surface of palm with 1 distal spine, lower surface with squamiform markings. Posterior border of merus of swimming leg serrated and bearing a few spines; dactyl without a red spot. Penultimate segment of male abdomen not convex on outer border. (Türkay 1995)
Carapace depressed, about 1.8 times as broad as long, surface covered with pubescence; regions distinct, every region with granulated areas, those on each side of the carapace tend to a symmetrical arrangement; metagastric and epibranchial regions each with a pair of granulated carinae. Front cut into 4 teeth, the middle two smaller and less protruding than the lateral ones, the latter more than twice as broad as the median ones. Orbit large, with dorsal margin serrated, inner angle bluntly dentiform. Antero-lateral margin bearing 9 teeth: first 3 teeth slightly curved, not claw-shaped, but next 5 teeth claw-shaped, pointed innerly forward; the last one the largest, spiniform and directed postero-laterally, posterior and postero-lateral junction rounded. Third maxillipeds with merus strongly produced at outer-distal angle.
Chelipeds stout and compressed, covered with pubescences and squamiform granules. Merus with 4 spines on the anterior margin, and 2 spines on the posterior margin. Carpus with 2 usual spines. Palm with dorsal surface armed with 3 carinae, the innermost ending in a spine; inner and outer surface also with carinae, the outer ones more distinct. Fingers sharp, distal end slightly incurved. Natatory leg with short and stout merus, distal end of its posterior margin bearing denticles; propodus longer than broad, without teeth on posterior margin.
Male first pleopod slender and elongate, sharply curved with an almost right-angled bent in the middle; the distal part armed with spinules directed backwards. Male abdomen griangular; the sixth segment longer than broad, the anterior margin slightly concave, the posterior margin straight, but the lateral margins are with a concave proximal portion and a convex distal portion. Telson triangular. Carapace length of the male 47 mm, breadth 85.7 mm. (Dai & Yang, 1991)
Type locality: Japan.
Range: Gulf of Aqaba (Stephenson, 1975); South Africa - Natal (Stebbing, 1915, Barnard, 1950, Stephenson & Cook, 1973); Madagascar - (Crosnier, 1962), Fort-Dauphin and Cap St André (Stephenson & Cook, 1973); Mauritius (Richters, 1880, Michel, 1964); India - (Henderson, 1893, Alcock, 1899a), Madras and Tranquebar (Stephenson & Cook, 1973); Sri Lanka (Henderson, 1893, Alcock, 1899a, Stephenson & Rees, 1968b, Stephenson & Cook, 1973); Mergui Archipelago (de Man, 1887c, Alcock, 1899a); West of Malay Peninsula - Thailand (Stephenson, 1972a, Stephenson & Cook, 1973); Sumatra - Poeloe Weh (Stephenson, 1975); Japan - (de Haan, 1837), Tokyo Bay and Kochi (Ortmann, 1893), Tanegashima and Kagoshima Bay (Stimpson, 1907), Enoshima and Sagami Bay (Parisi, 1916), Shimoda (Sakai, 1935), Tateyama Bay, Manazuru, Shimoda, Ise Bay, Gobo and Nagasaki (Sakai, 1939), Sagami Bay (Sakai, 1965b, Stephenson, 1972a), Yamagata, Toyama Bay, Suruga Bay, Enoshima, Misaki, Wakanoura, Kagoshima and Kochi (Stephenson & Cook, 1973), Oga Peninsula, Inubo-zaki, Tokyo Bay, Sagami Bay, Izu Peninsula, Mikawa Bay, Ise Bay, Kii Peninsula, Tosa Bay, and Nagasaki (Sakai, 1976a), Ogasawara-shoto (Takeda, 1977a), Yamagata Prefecture (Suzuki S., 1979), Shiono-misaki (Takeda, 1979a), Nanki Shirahama (Miyake, 1983), Oshima Passage, Amami-Oshima (Takeda, 1989), Mikawa Isshiki (Apel & Spiridonov, 1998), off Matsuyama, Seto Inland Sea (Takeda et al., 2000); Korea - Sogwipo (Kamita, 1941), Geo-mun Island, Namcheon Dong and Hae-undae (Kim, 1973), Cheju and Sogwipo (Kim & Chang, 1985); East China Sea (Takeda & Miyake, 1968c); Taiwan - Tingch'ieting (Lin, 1949), Hsin-chu, Kaohsiung Province, and I-lan Province (Huang & Yu, 1997); China - China Sea (Stimpson, 1907), Guangxi, Guangdong and Fujian (Dai & Yang, 1991); South China Sea - Nansha Islands (Dai & Xu, 1991, Yang & Dai, 1994); Gulf of Thailand (Rathbun, 1910a, Stephenson & Cook, 1973); Malaysia - Terengganu (Lanchester, 1902); Singapore (Shen, 1937, Stephenson, 1972a, Stephenson & Cook, 1973); Sulu Archipelago - Jolo (Stephenson, 1972a, Stephenson & Cook, 1973); Indonesia - Sumatra, Lembeh Strait, Sunda Strait and Java Sea (Stephenson & Cook, 1973), Sunda Strait and Java Sea (Stephenson, 1972a), Padaido Island, Irian Jaya (Stephenson, 1975); south of New Guinea (Miers, 1886); Australia - Abrolhos Islands (Stephenson, 1961), off Darwin (Stephenson & Rees, 1968b, Stephenson & Cook, 1973); New Caledonia (Moosa, 1996); Chesterfield Islands (Moosa, 1996); 10-345 m.