Alcock, 1898
Carapace globose, regions poorly marked. Antero-lateral margins constricted behind postorbital spine, inflated. Epibranchial tooth well developed, acute. Postero-lateral margins rounded. Frontal margin narrower than greatest width of carapace. Submedian frontal lobes separated by rounded sulcus. Lateral lobes wider, less prominent than submedian pair, separated from latter by shallow, skewed indentation. Orbits too shallow to conceal eyes. Superior angles of orbits markedly tuberculate. Postorbital angle conical, acute, directed obliquely outward. Inferior internal orbital tooth spiniform, visible beyond supraorbital angle, extending as far forward as lateral lobe. Orbital margin crescentic.
Anterior margin of buccal frame sinuous, minutely notched medially; crests of endostome, defining anterior borders of efferent canals rounded, nicked. Interantennular septum short, subquadrate. Endognath of first maxilliped paddle-shaped, its anterior margin sinuous, antero-interior angle rounded. Exognath of external maxilliped nearly cylindrical, inner margin slightly scooped distally, bearing triangulate tooth. Inner margin of ischium of endognath produced, wide-angled, proximally tuberculate, setose; merus subpentagonal, inner margin setose.
Chelipeds elongate, subequal, granular. Anterior margin of ischium crenate, tuberculate, median tubercle spiniform. Merus about 0.7 carapace length, anterior margin serrate with irregular triangular teeth. Internal angle of carpus with two spines, distal spine larger. Palm 1.3 carapace length, strongly tuberculate, tubercles larger on lower margin. Inner margin of ambulatory propodi spinose. First ambulatory leg 1.6 carapace length. On posterior margin of fourth ambulatory dactyl thirteen triangular teeth, smaller proximally, basally spinose; interiorly above six distalmost teeth cornute spines. Short, irregular rows of spinules on interior and anterior surfaces. (Galil & Takeda, 1985)
Type locality: Sri Lanka.
Range: Sri Lanka - (Alcock, 1898), Colombo (Serène, 1973, Castro, 1999a, 1999b); Andaman Islands (Alcock, 1898); Japan - Tanegashima (Galil & Takeda, 1985); Singapore; South China Sea - off Natuna Islands (Galil, 1986b), off Sarawak (Serène, 1973, Castro, 1999b); Philippines - Gulf of Davao (Galil, 1986b, Castro, 1999b); Indonesia - Ambon (Castro, 1999b); 18-82 m.