Anadara (Tegillarca) rhombea   (Born)  (Clam)
Organism information awaits expert curation
Class: Bivalvia

Shell squarely heart shaped; thick and heavy equivalved except in juveniles where left valve slightly bigger than the right valve, sides angularly contracted in upper part and round below; covered with blackish brown horny periostracum thicker and horny in posterior part and hairy in hind portion of juveniles; umbo narrow and situated midway between anterior and posterior sides; a distinct keel present from umbo to hind end lower margin of shell valves;ligament area wide; diamond shaped giving more space for opening shell valves; ligament with mingle marginal chevron, radial ribs 25+1; course and tubercled except in the posterior side, where ribs are smooth, hinge plate straight and teeth vertically arranged; teeth separated at centre of hinges by a space where one or two comparatively bigger teeth present; anterior and posterior side of hinge bear 17-18 teeth each; byssus single thread like; long and persistent only in young.

Synonym (s)

Common Name (s)
Economic Importance and Threats

Habitat:  Estuarine


• Tamil Nadu, Parangipettai Coast INDIA

Literature Source(s)
  • Shanmugam, A; Rajagopal, S and Nazeer, RA Common bivalves of Parangipettai coast Available at - NIO, Goa
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -

Page last updated on:2012-11-27

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