de Man, 1895
Carapace hexagonal, broader than long, regions well defined, elevated and marked with patches of granules. Front projecting, cut into 2 lobes, each slightly concave and bearing narrow notch on the anterior margin, separated from innerorbital angle by a notch. Dorsal margin of orbit with 2 fissures. Outer angle depressed and small. Antero-lateral margin sharp, armed with 4 triangular teeth: the first small, the second slightly larger and with an accessory denticle on the posterior margin, the last sharp and produced. Postero-lateral margin straight, converged backwards and granulated.
Chelipeds asymmetrical. Merus shortly triquetrous, with granules along the dorsal margin. Carpus coarse on the dorsal surface, with an obtuse tooth at the inner-distal angle. Palm with 2-3 longitudinal granulated carinae on the dorsal surface, granules on the inner one larger and dentiform in some specimens, outer surface smooth. Fingers armed with teeth along the inner margins and incurved at tips. Ambulatory legs elongate and thin; propodus and dactylus with long setae along anterior and posterior margins; dactylus depressed and tipped with cuticular claw.
First pleopod of the male with its distal half slightly arched dorsally inwards, tip hook-shaped. Male abdomen narrow and long, 7-segmented. Telson acutely triangular. Carapace length of the male 11-14.3 mm, breadth 16.9-20.4 mm. (Dai & Yang, 1991)
Type locality: Java Sea.
Range: east coast of India (Alcock, 1898); Nicobar Islands (Alcock, 1898); Malaysia - Pinang and Johore Strait (Guinot & Ng, 1987), Melaka; Japan - Tosa Bay, Amami-shoto, and Ishigaki-jima (Sakai, 1976a); Korea; China - Jiaozhou Bay (Shen, 1937), Santuao, Tsimei, Liuwutien, and Xiamen (Shen, 1940b), Guangdong, Fujian, Zhejiang, and Gulf of Jiaozhou (Dai & Yang, 1991); Singapore (Balss, 1938b, Guinot & Ng, 1987); Indonesia - Java Sea (de Man, 1895a).