Lamarck, 1818
Carapace depressed, rough, branchio-cardiac groove indistinct, hepatic region without strong vertical tubercle; lateral margins arched or sub-parallel; front not remarkably wide. Interantennular septum rugose. Epistome rugose, not sunken transversely, its antero-lateral portion with one entire highly arched ridge, which touches the m-shaped upper border of the buccal cavern, epistomial ridge entire, not tuberculate. Sternite of the chelipeds lightly coloured. Antero-internal angle of external maxilliped not produced transversely. External surface of cheliped palm rough with two distinct ridges, finger tips coloured dark tan or brown. Inferior distal extremity of last pair of ambulatory legs serrate. Male abdomen with sixth segment equal to or shorter than fifth. Male first pleopod curved, not stout. (Türkay 1995)
Type locality: Mauritius.
Range: Gulf of Aqaba (Crosnier, 1965); Red Sea - (Kossmann, 1877, Ortmann, 1894a), Eilath (Crosnier, 1965); east coast of Africa; Mauritius (Lamarck, 1818, Michel, 1964); Pakistan - Baluchistan and Sindh coast (Alcock, 1900b); India - Malabar coast and Coromandel coast (Alcock, 1900b), Bombay and Okha (Chhapgar, 1957); Sri Lanka (Alcock, 1900b); Burma - Arakan and Tenasserim coast (Alcock, 1900b), Tavoy (Chopra & Das, 1937); Andaman Islands (Alcock, 1900b); Nicobar Islands (Alcock, 1900b); Mergui Archipelago (Alcock, 1900b, Chopra & Das, 1937); Sumatra - Banda Aceh; Malaysia - Pinang (Lanchester, 1902); Japan - Okinawa and Kikaishima (Stimpson, 1907), Hachijo-jima (Sakai, 1954), Sagami Bay (Sakai, 1955a, 1965), Sagami Bay, Kii Minabe, Ashizuri-misaki, Tanegashima, Yoron, and Ishigaki-jima (Sakai, 1976a), Kuroshima, Yaeyama-retto (Miyake, 1983), Enoshima, Manazuru, Tosa Bay, Yaku-shima, Amami-Oshima, and Yoron-jima (Muraoka, 1998), Ginowan, Okinawa (Shokita et al., 2000); Taiwan - Tainan and Chi-lung (Sakai, 1939, Lin, 1949); China - Hong Kong (Stimpson, 1907), Paracel Island (Chen, 1975), Guangdong, Hainan Island, and Paracel Islands (Dai & Yang, 1991); Philippines - Manila Bay (Serène & Vadon, 1981); Indonesia - Kepulauan Aru (Miers, 1886), Edam Island, Noordwachter Island and Ambon (de Man, 1888d), Java Sea and Pontianak (de Man, 1898), Gaspar Strait (Stimpson, 1907), Lombok, Madura Bay, Semau Island, Adonara Island, and Ambon (Tesch, 1918a); New Guinea - Kais (Ortmann, 1894a); New Britain - Rabaul (Takeda & Nunomura, 1976); Solomon Islands - Gizo and Guadalcanal Island (Takeda & Nunomura, 1976); Australia; Vanuatu - Santo (Takeda & Nunomura, 1976); New Caledonia - Moneo and Poum (Takeda & Nunomura, 1976); Hawaiian Islands - Oahu (Rathbun, 1906), Oahu and Johnston Island (Edmondson, 1959); Chile - Valparaiso (Dana, 1852).