Portunus argentatus

(White, 1847)

Carapace moderately broad (breadth about 1.7-1.9 times length); surface with widely spaced granular areas being separated by regions with a dense pubescence; regions well recognizable; front with 4 rounded lobes, laterals much broader than laterals; antero-lateral borders with 9 teeth, last one much the longest, directed outwards; postero-lateral junction rounded. Antero-external angle of merus of third maxillipeds markedly produced into a lobe. Chelipeds stout; merus with 2 spines at posterior border, anterior border with 4 spines; carpus with 2 spines of normal length; upper surface of palm with 1 distal spine, lower surface with squamiform markings. Posterior border of merus of swimming leg serrated and bearing a few spines; dactyl with an obvious red spot. Penultimate segment of male abdomen markedly convex on outer borders. (Türkay 1995)

Postero-lateral junction of carapace rounded; antero-external angle of merus of third maxilliped strongly produced laterally; last antero-lateral tooth distinctly larger than other teeth; carapace relatively broad; round dark spot on dactyl only of fifth leg; iridescent sheen present, particularly on outer carina of palm of cheliped. (Davie 1999)

Type locality: Borneo.
Range: Zanzibar; Mozambique - Delagoa Bay (Barnard, 1950); South Africa - off Umvoti River mouth, Natal (Barnard, 1950); Madagascar (Crosnier, 1962); India - Ganjam coast and Malabar coast (Alcock, 1899a), Gulf of Mannar (Laurie, 1906); Sri Lanka (Alcock, 1899a); Andaman Islands (Alcock, 1899a, Edmondson, 1954); Myanmar - Arakan coast (Alcock, 1899a), Gulf of Martaban (Henderson, 1893), Mergui Archipelago (Alcock, 1899a); West Malay Peninsula - Thailand (Stephenson, 1972a); Japan - Kagoshima (Ortmann, 1893), Shimoda, Gobo and Tosa Bay (Sakai, 1939), Sagami Bay, Shimoda, Mikawa Bay, Kii Minabe, and Tosa Bay (Sakai, 1976a); Korea - Cheju-do (Kim, 1973); Taiwan - Tingch'ieting and Hsiak'unhsen (Lin, 1949), off Chi-lung (Takeda & Miyake, 1969d), Kaohsiung Province, Tung-kang, Chi-lung, and I-lan Province (Huang & Yu, 1997); China - Guangdong including Hainan Island (Dai & Yang, 1991); Hong Kong; South China Sea - Nansha Islands (Dai & Xu, 1991); Philippines - south of Manila Bay, north of Lubang Island and Verde Island Passage (Moosa, 1981), Mindanao, Leyte, Tawitawi; Celebes Sea (Miers, 1886); Malaysia - off Kerteh (Stephenson, 1972a); Indonesia - Borneo (White, 1847f), Ternate (de Man, 1906), Sunda Strait, Bali Strait, Ambon Bay and Kepulauan Kai (Stephenson, 1972a); Australia - Onslow and Dampier Archipelago, W.A. (Stephenson, 1961), Linden Bank, east of Cairns, Queensland; Hawaiian Islands - Molokai Island (Rathbun, 1906); 30-100 m.

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