(de Haan, 1835)
Carapace with orbits moderately oblique; front broad, narrowest below eyestalk bases; antero-lateral margins approximately straight, converging, exorbital tooth acute and produced, directed antero-laterally. Palm of major cheliped finely granulate to tuberculate in the center of inner face, oblique ridge high and thin, tubercles largest on highest point of ridge; outer face with extremely minute tubercles, no depression at base of immovable finger; small cheliped in both sexes with merus not flattened posteriorly and not armed with a supraventral row of tubercles, gape throughout about as wide as immovable finger, with weak serrations, which may be absent. Meri of fourth and fifth pereiopods narrow, fifth always strikingly slender. Horny terminal endpiece of male first pleopod with strongly developed flanges; palp short. (Türkay 1995)
Type locality: Japan.
Range: South Africa - Durban Bay (Krauss, 1843, Stebbing, 1917c); Karachi (Alcock, 1900b); India - Pondicherry (Kingsley, 1880); Andaman Islands (Alcock, 1900b); Japan - (de Haan, 1835), Ise Bay, Tosa Bay, Miyazaki, Nagasaki and Amakusa (Sakai, 1939), Kagoshima, Miyazaki, Fukuoka, and Onomichi (Crane, 1975), Ishigaki and Iriomote-jima (Sakai, 1976a), Mie Prefecture, Tosa Bay, Okayama Prefecture, Miyazaki, Nagasaki, Amami-Oshima, Ishigaki-jima, and Iriomote-jima (Sakai, 1976a), Amakusa (Yamaguchi et al., 1976), Tsuboi-gawa, Kumamoto (Miyake, 1983), Tanabe, Kochi and Omura Bay (Muraoka, 1998); Korea - western Korea (Kamita, 1935), Daechon, Ganghwa Island, Bi-geum Island, and Sorae (Kim, 1973); Taiwan - (Parisi, 1918, Sakai, 1939, 1976), Tung-kang, Hsin-chu, Tafuko, Lu-kang, Wuch'i, An-ping, and Tan-shui (Lin, 1949), Tan-shui and Hsin-chu (Crane, 1975); China - Macao (H. Milne Edwards, 1852, Stimpson, 1858b, 1907), Xiamen (Cano, 1889), Hainan Island (Shen, 1936), Tsimei, Xiamen, and Hainan Island (Shen, 1940b), Hong Kong (Shen, 1940), Hong Kong, Xiamen, Tsimei, Chin Bay and Liuwutien (Crane, 1975), Hainan Island and Fujian (Dai & Yang, 1991); Philippines - Cebu (Serène, 1973); Indonesia - Borneo (Adams & White, 1848), Sarawak, Borneo (Nobili, 1901), Lombok, Sumbawa, Flores, and Donggala (Tesch, 1918a), Buntal, Borneo (Maccagno, 1928), Makassar and Ambon (Serène, 1973); New Guinea - Kaiser-Wilhelms-Land (Ortmann, 1894a); Palau (Sakai, 1936, Miyake, 1938); Australia - Queensland (Macnae, 1966); New Caledonia (A. Milne Edwards, 1873, Boone, 1934, Serène, 1973); Fiji (Balss, 1938a); Samoa - Upolu (Ortmann, 1894a); mouth of river or mangrove area, near upper tidal marks.