Sesarma (Sesarma) oceanica   de Man  (Crab)
Organism information awaits expert curation
Taxonomy
Kingdom:Animalia
Phylum:Arthropoda
Class: Malacostraca
Order:Decapoda
Family:Sesarmidae

Dorsal view of crab

Description
Size (male): Length of carapace: 36 mm; breadth of carapace: 31 mm; breadth of front: 17 mm; length of merus of leg: 26 mm; breadth of merus of leg: 11 mm.

Color: Color of the carapace and legs varying from light violet to almost black. The palm and fingers of the chelipeds orange to cherry-red, finger tips white, extreme tips horny.

This species is distinguished by the shallow, depressed carapace, which is longer than broad, and has two teeth on the lateral borders behind the outer orbital angle. The post-frontal lobes of the gastric region are smooth. The fingers of the chelipeds have no milling. The meri of the legs are more than three times as long as broad, and the dactyli are short. The carapace in its anterior half is covered with little dense tufts of hair resembling tubercles, amid a finer fur resembling granules. The palm of the chelipeds is almost smooth, except for two granular ridges, one extending along the lower border up to the base of the immobile finger, the other along the inner edge of the same finger. The angular lobe near the far end of the inner border of the arm is hardly prominent, being a blunt projection. The inner angle of the wrist is pronounced but not dentiform; close to and parallel to it runs a ridge; a smooth ridge runs outside the granular ridge at the upper border of the palm. On the upper border of the dactylus are two horny teeth; the tips of the fingers are cut off diagonally, resembling tongs. The meropodites of the legs are only two and half times as long as broad. The male abdomen is long and narrow. The anterior male abdominal appendages are straight up to the tip, which bears numerous long hairs.



Synonym (s)
Sesarma oceanicum Alcock, 1900
Sesarma(Sesarma)rotundata Tesch, 1917

Common Name (s)
Economic Importance and Threats

Ecology

Biogeography


• Gujarat, Kolak INDIA
• Andaman and Nicobar Islands, Nicobars INDIA

Literature Source(s)
  • Chhapgar, BF (1957) Marine crabs of Bombay state Contribution No. 1 of the Taraporevala Marine Biological Station Marine Biological Station, Department of fisheries, Bombay 89 pp Available at - NIO, Goa
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at - http://www.marinespecies.org

Page last updated on:2010-11-18

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