Pitar erycina   Linnaeus  (Clam)
Organism information awaits expert curation
Class: Bivalvia

The shell is thicker and somewhat less strongly inflated; the umbo is inclined forwards. The length of the shell is proportionately much greater than the height; surface of the shell traversed by strong concentric grooves with moderately broad flattened spaces intervening between them; these interspaces slope slightly downwards at their posterior margins and those towards the ventral margin of the shell tend to take the form of definite, raised ridges as a result of the intervening grooves widening considerably over this region. The hinge teeth are solid; the tooth infront of the cardinals being specially well developed and the posterior lateral tooth narrow and much elongated; the lunule is well defined and somewhat depressed; the pallial libe is deeply sinuate; the anterior adductor impression tends to be slightly depressed.

The inner surface is smooth, pale yellow, within the pallial line, and bluish white outside it. The outer surface is pale brown, tinged with orange red towards the anterior and ventral margins and conspicuously rayed with radially widening dark or chocolate brown bands of varying widths diverging from the umbo; the area behind the umbo and the area immediately surrounding the lunule are traversed by widely spaced brown strips.

Synonym (s)

Common Name (s)
Economic Importance and Threats

Habitat:  Coastal


• Tamil Nadu, Parangipettai Coast (Lat: 11.48) (Long: 79.77) INDIA
• Goa, Marmagao (Lat: 15.41) (Long: 73.78) INDIA
• Tamil Nadu, Dhanushkodi INDIA
• Tamil Nadu, Mandapam INDIA

Literature Source(s)
  • Apte,D (1998) The book of Indian shells Oxford University Press 115
  • 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 - http://www.marinespecies.org
  • Sivadas, S; Ingole, B and Nanajkar, M (2011) Temporal variability of macrofauna from a disturbed habitat in Zuari estuary, west coast of India Environ Monit Assess Springerlink 173 65-78 Available at - http://www.springerlink.com/content/t413027551266727/fulltext.pdf
  • Samuel, VD; Chacko, D and Edward, JKP (2005) Preliminary study on the molluscan diversity of “the lost world’’– Dhanushkodi, east coast of India Proceedings of the National Seminar on Reef Ecosystem Remediation SDMRI Special Research Publication No.9 54-58 Available at - http://www.sdmri.org/reports/proceedings%202005%20-%20sdmri.pdf
  • Sundaram, KS; Sarvesan, R; Mohamed, KH and Shanbhogue, SL (1969) Catalogue of molluscs, prawns, stomatopods and marine algae in the reference collections of the central marine fisheries research institute Bulletin Of Central Marine Fisheries Research Institute CMFRI, Cochin 9 1-52 Available at - http://eprints.cmfri.org.in/570/1/Bulletin_9.pdf

Page last updated on:2011-03-14

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