(de Haan, 1835)
Carapace glabrous, with transverse granular lines on protogastric and mesogastric regions, epibranchial line interrupted at the cervical groove and faint across midline; front with 6 teeth, medians and submedians truncate, laterals triangular and distally rounded; antero-lateral borders with 6 teeth, first 4 distally rounded, following 2 acute, last tooth much the largest, directed outwards; postero-lateral junctions rounded. Antennal flagellum excluded from orbit. Cheliped merus with 2 spines and 1-2 granules on anterior border, posterior border smooth; carpus with a strong internal spine, outer border with 2-3 spinules often reduced to granules; palm with 1 distal spine on upper border. Merus of swimming leg with a subdistal posterior spine, propodus with smooth on posterior border in adult specimens. (Türkay 1995)
Antennal flagellum excluded from orbital hiatus; posterior border of cephalothorax curved, forming curved postero-lateral junction; 6 antero-lateral teeth, first antero-lateral tooth not truncate; second antero-lateral tooth distinctly smaller than first; last antero-lateral tooth a long spine; no distinct cardiac ridges on carapace. (Davie 1999)
Type locality: Ambon, Moluccas.
Range: Red Sea (Nobili, 1906); Madagascar - north-west coast (Crosnier, 1962); Pakistan (Hashmi, 1964); West Sumatra - Padang (Stephenson, 1972a); Japan - Okinawa-jima (Minei, 1971), Iriomote-jima (Sakai, 1980), Amami-Oshima and Iriomote-jima (Sakai, 1983); China - Hong Kong (Stimpson, 1907, Shen, 1932), Fujian (Dai & Yang, 1991); Taiwan - Kaohsiung and P'eng-hu (Lin, 1949), Kaohsiung Province and Chi-lung (Huang & Yu, 1997); Thailand - near Hua Hin (Apel & Spiridonov, 1998); Malaysia; Singapore (Nobili, 1903c, Shen, 1937, Stephenson, 1972a, Apel & Spiridonov, 1998); Philippines - Manila Bay (Moosa, 1981), Negros (Apel & Spiridonov, 1998), Cebu; Indonesia - Java Sea and Kepulauan Kai (Stephenson, 1972a), north coast of Java (Stephenson, 1975), Timor, Padang, Java and Moluccas; Papua New Guinea - Port Moresby (Stephenson, 1972a); Australia - Exmouth Gulf and Sir Edw. Pellew Group, Gulf of Carpentaria (Stephenson et al., 1957); New Caledonia; 6-14 m.