Portunus emarginatus   Leach,  1814 (Crab)
Organism information awaits expert curation
Class: Malacostraca

Median frontal teeth very much smaller and less prominent than laterals. Penultimate segment of male abdomen slightly broader than long, with markedly concave lateral borders. Ultimate segment rounded and about as broad as long.

Carapace extremely broad (breadth 2.4 times length), bearing very large orbits. Anterolateral borders concave anteriorly and the porterior-posterolateral junction approximately a right angle. Front consists of four flat rounded lobes, the medians very much smaller than the laterals. The first anterolateral teeth large and blunt, the fourth and sixth noticeably smaller than the remainder, the ninth extremely long. The posterior border of carapace is finely beaded. Chelipeds are elongate, slender and granular. Posterodistal border of the arm bearing a lobule followed by a blunt spine. Anterior border of the arm with 4 spines. Two usual wrist spines are elongate. Upper surface of hand with only 2 carinae, each ending in a conspicuous spine.

This species is close to Portunus macrophthalmus and Portunus longispinosus. The species is distinguished by the shape of this structure and by the details of male pleopod structure.

Synonym (s)
Portunus emarginatus Stephenson & Campbell, 1959

Common Name (s)
Economic Importance and Threats



• Andaman and Nicobar Islands, Andaman Islands (Lat: 12.5) (Long: 92.75) INDIA
• Lakshadweep INDIA
• Andaman and Nicobar Islands INDIA
• Lakshadweep Islands (Lat: 8.28) (Long: 72.16) INDIA (Record: 01/1987-03/1987)
• Lakshadweep Islands (Lat: 11.68) (Long: 73.68) INDIA (Record: 01/1987-03/1987)

Literature Source(s)
  • Tikadar, BK; Daniel, A and Subbarao, NV (1986) Sea shore animals of Andaman and Nicobar Islands The Director, ZSI, Kolkatta 188 Available at - ZSI, Pune
  • Jeyabaskaran, R; Wafar, S and Wafar, M (2002) CD on Brachyuran Crabs of West Coast, India Available at - http://www.nio.org/Biology/brachyuran/index.html
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at - http://www.marinespecies.org
  • Rao, GS; Suseelan, C and Kathirvel, M (1989) Crustacean resources of the Lakshadweep islands Marine living resources of the union territory of Lakshadweep: An indicative survey with suggestions for development Bulletin of Central Marine Research Institute CMFRI 43 72-76 Available at - http://eprints.cmfri.org.in/8213/1/Bulletin_No_43.pdf

Page last updated on:2011-04-21

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