(Herbst, 1783)
Carapace moderately broad, somewhat pentagonal in outline. Surface with the regions feebly marked, its greater part smooth but usually granular near the borders. Antero-lateral border indistinctly four-lobed, the first obsolete, the second usually marked by a granular denticle, the third and fourth by two coarse granular spines. Front obliquely bilobed but appearing quadridentate, because of the inner and outer angles of each lobe equally prominent. Chelipeds unequal and massive in large males; palm smooth, except for small and sparse granules in the proximal part. Ambulatory legs long, stoutish; upper margin of merus scabrous and spinulate. (Guinot 1998)
Carapace moderately broad, somewhat pentagonal in outline. Surface with the regions feebly marked, entirely profusely granular. Antero-lateral border with three teeth. Front with the outer teeth very much reduced and the inner far most prominent. Chelipeds unequal; carpus and palm covered with numerous granules. (Guinot 1998)
Type locality: East Indies.
Range: Strait of Hormuz (Stephensen, 1945); India - Vizagapatam (Alcock, 1898), Bombay (Chhapgar, 1957), Ganges Delta; Taiwan - Hsiak'unhsen and Tingch'ieting (Lin, 1949), Kaohsiung (Sakai, 1976a); China - Hong Kong (Alcock, 1898), coast of South China (Sakai, 1976a), Guangdong, Guangxi, and Fujian (Dai & Yang, 1991); Vietnam - Haiphong (Guinot, 1969c); Singapore (Nobili, 1903); Australia - Port Darwin (Miers, 1884a), Bowen and Cape Gloucester (Rathbun, 1923a), Moreton Bay (Campbell & Stephenson, 1970); 30-50 m.