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Rathbun, 1911

Carapace narrow (breadth about 1.5 times length); surface with well separated granular areas with a fine pubescence among the granules; regions well recognizable; front with 2 broad, reasonably sharp lateral lobes, and a central confluent lobular area without clear lobes; antero-lateral borders with 9 teeth, last one slightly the most protruding; postero-lateral junction rounded. Antero-external angle of merus of third maxillipeds markedly produced into a lobe. Chelipeds elongate, propodus nearly as long as merus; merus with 2 spines at posterior border, anterior border with 4 spines; carpus with 2 spines; upper surface of palm with 1 distal spine, lower surface with squamiform markings. Posterior border of merus of swimming leg with small serrations. (Türkay 1995)

Postero-lateral junction of carapace rounded; antero-external angle of merus of third maxilliped strongly produced laterally; carapace relatively narrow, with main granular patches separated by microscopically granular areas; last antero-lateral tooth slightly the largest; median frontal teeth composed of 2 lobes which fuse medially and on a lower plane than laterals; male pleopod relatively short and stout, but of a normal shape. (Davie 1999)

Type locality: Cargados Carajos Islands, 54 m.
Range: Red Sea; Gulf of Aden - Ras Imran (Apel & Spiridonov, 1998); Socotra; Madagascar - Tôlanaro (Crosnier, 1962); Mauritius (Michel, 1964, Stephenson, 1972a); Cargados Carajos Islands (Rathbun, 1911); Seychelles (Rathbun, 1911); Persian Gulf (Stephensen, 1945, Apel & Spiridonov, 1998); West of Malay Peninsula - Thailand (Stephenson, 1972a); Japan - Shimoda and Nagasaki (Sakai, 1939), Sagami Bay (Sakai, 1965b), Sagami Bay, Shimoda, Mikawa Isshiki, Kii Minabe, Tosa Bay and Nagasaki (Sakai, 1976a), Shiono-misaki (Takeda, 1979a), Ginowan, Okinawa (Shokita et al., 2000); Taiwan - Tingchieting (Lin, 1949), I-lan Province (Huang & Yu, 1997); South China Sea - Nansha Islands (Dai & Xu, 1991); Philippines; Sulu Archipelago - Jolo (Stephenson, 1972a); Indonesia - Ambon and Kepulauan Kai (Stephenson, 1972a), Kupang, Timor (Stephenson, 1975); Australia - Mapoon, Queensland (Stephenson & Campbell, 1959), Shark Bay to Dampier Archipelago, W.A. (Stephenson, 1961), Swain Reefs and Capricorn Group (Stephenson & Rees, 1968b), Thursday Island (Stephenson, 1972a); New Caledonia - (Moosa, 1996), Nouméa (Takeda & Nunomura, 1976); Bikini Atoll; Marquesas Islands; 20-320 m.

Portunus orbitosinus