(Lamarck, 1801)
The carapace has, at the epibranchial angle, a tooth or a crest emphasized on the inside by a furrow. The chelipeds have the crest on the superior margin of the palm clearly defined and generally protruding. The epibranchial angle of the carapace never has a tooth, the crest of the antero-lateral margin is continuous with the postero-lateral margin. The carapace, chelipeds and legs have smooth or punctate surfaces. The carapace is less broad, about 1.6 times broader than long. The surface of the carapace is marked by large, compact punctations that are almost juxtaposed here and there but obliterated on the posterior part. The front is slightly advanced towards the middle. The third maxilliped has a transverse tuft of setae near the anterior margin of the merus. The crests of the antero-lateral margins of the carapace are continued to the epibranchial angle by a short crest that gradually disappears along the postero-lateral margins. The first pleopod of the male has been figured by Gordon (1934, fig. 14A) and Stephensen (1945, fig. 39b). The colour is nut-brown with yellow punctuations. (Serène, 1984)
Type locality: unknown.
Range: Zanzibar (Serène, 1984); Mauritius (Ortmann, 1893); Persian Gulf (Stephensen, 1945); Gulf of Oman (Stephensen, 1945); India - Bombay, Karwar and Okha (Chhapgar, 1957), Bay of Bengal; Sri Lanka (Alcock, 1898); Andaman Islands (Alcock, 1898); Mergui Archipelago (Alcock, 1898, Chopra & Das, 1937); Sumatra - Banda Aceh; Malaysia - Pinang (Lanchester, 1902); Japan - (de Haan, 1835, Parisi, 1916), Tokyo Bay (Ortmann, 1893), Izu (Parisi, 1916), Shimoda (Sakai, 1935), Suno-saki, Shimoda, Nanki Shirahama and Miyazaki (Sakai, 1939), Sagami Bay (Sakai, 1965b), Tokyo Bay, Sagami Bay, Izu Peninsula, Kii Peninsula, Tosa Bay, and Kagoshima (Sakai, 1976a), Kushimoto (Miyake, 1983); Taiwan; China - Hong Kong (Stimpson, 1907), Hainan Island and Guangdong (Dai & Yang, 1991); Singapore (Alcock, 1898, Serène, 1984); Philippines - Cebu (Serène, 1984); Indonesia - Edam Island and Noordwachter Island (de Man, 1887d), Pontianak; New Caledonia - Ilot Maitre (Takeda & Nunomura, 1976); 10-30 m.