Portunus orbitosinus   Rathbun,  1911 (Crab)
Organism information awaits expert curation
Class: Malacostraca

Image copyrights: NIO, Goa

Propodus of chelipeds nearly as long as merus. Median frontal teeth small and obtuse. Penultimate segment of male abdomen not convex on outer borders.

Carapace narrow and breadth is 1½ times of length. Posterior-posterolateral junction rounded. Front consists of two protruding lateral lobes and a central mass consisting of 2 lobes which fuse medianly and on a lower plane. Anterolateral teeth are nine in number and all are equal and sharp.Chelipeds are granular and with a dense pubescence, except on the under surface, which bears squamiform markings. Arm with posterior border bearing 3 spines. The spines on the anterior border become smaller proximally, 4 are present on the right chela and 4 plus 2 stout spiniform tubercles on the left. Posterodistal border of merus with small serrations.

Some variations occurs within this species. Hairs or bristles on the outside of one appendage which are not present upon two others.

Synonym (s)
Portunus (Achelous) orbitosinus Rathbun, 1911

Common Name (s)
Economic Importance and Threats

Habitat:  Sandy


• Lakshadweep INDIA
• Andaman and Nicobar Islands INDIA
• Red Sea
• 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)
  • (2002) Lakshadweep Islands biodiversity strategy and action plan (Version: 3)
  • 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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