Portunus longispinosus   (Dana,  1852) (Crab)
Organism information awaits expert curation
Taxonomy
Kingdom:Animalia
Phylum:Arthropoda
Class: Malacostraca
Order:Decapoda
Family:Portunidae

Image copyrights: Guam

Description
Chelipeds very long and slender, being more than 2.5 times as long as carapace; palm with two distal spines side by side. Middle teeth of front very much smaller and less prominent than the outer.

Carapace flattish, its length is from 2/3 to ¾ its breadth without the spines. Its surface is subtomentose and is cut up into well defined sub-regional elevations. Front prominent and beyond the epistome, cut into four usually acute, triangular teeth - the middle two small and receding, the outer ones very large and prominent supra-orbital margin cut by 2 fissures. Antero-lateral borders moderately oblique, armed with a variable number of small and inconspicuous teeth, and ending in a lateral epibranchial spine that is about half the breadth of the carapace in length. The number of teeth, including the outer orbital angle and the lateral spine, varies from 6 in the young to 9 in the adult. The posterior border is nearly straight and makes a dentiform angles. Chelipeds of male about 2½ times the length of the carapace, granular. 3 or 4 spines on the anterior border of the arm and one at the far end of the posterior border. There are 3 spines on the hand, one being in front of the apex of the wrist joint, the other standing side by side in the distal half of the upper surface. First three pairs of legs slender.

Portunus macrophthalmus, Portunus longispinosus and Portunus emarginatus all have somewhat similar pleopods, viz. short, robust, markedly curvate, and bearing a series of moderate elongate hairs on the inner surface. The spinulation on the under surface affords a clear distinction between Portunus longispinosus and Portunus emarginatus.


Synonym (s)
Amphitrite longispinosa Dana, 1852

Common Name (s)
Economic Importance and Threats

Ecology
Habitat:  Sandy

Biogeography


• Lakshadweep INDIA
• Andaman and Nicobar Islands INDIA
• INDIA
• SRI LANKA
• MALDIVES
• Tamil Nadu, Gulf of Mannar INDIA
• Tamil Nadu, Chennai INDIA

Literature Source(s)
  • 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
  • Florida Museum of Natural History Available at - http://www.flmnh.ufl.edu/
  • Marine Biological Station, Chennai, Tamil Nadu (2003) Checklist of marine fauna of Tamil Nadu Department of Environment, Government of Tamil Nadu Available at - http://tnenvis.nic.in

Page last updated on:2010-11-12

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