Cardita bicolor [Status Unaccepted]   Lamarck,  1819 (Clam)
Organism information awaits expert curation
Class: Bivalvia

Size: 15-50 mm

Colour: Creamy white with brown blotches.

The shell is thick, solid and triangular, equivalve; the valves are deep and somewhat oblique, i.e., the longest dorso-ventral axis of the shell runs obliquely from the umbo to the ventral margin; umbo rather conspicuosly curved anteriorly; no pallial sinus; strong radial ribs with narrow inter spaces, 2 cardinal teeth in one valve, posterior teeth extending from the umbo and separated from each other by a deep groove. The anterior toot is minute and sometimes almost absent. The shell is sculptured with very strong radial ribs, the ribs being thick and well raised with flattened surfaces. The anterior ribs are usually transversely tuberculated while the median and posterior ones are smooth. The interstices between the ribs are deep. The shell is white, with brownish or bright orange spots which are mainly confined to the surfaces of the ribs and tend to be larger anteriorly. In fresh shells there is a thin, tawny brown periostracum. The inner surface margin appears toothed owing to the presence of the external radial ribs.

Synonym (s)

Common Name (s)
Economic Importance and Threats
Importance:  Commercial

Habitat:  Sandy


• Kerala, Vazhakala (Lat: 10.03) (Long: 76.28) INDIA
• Tamil Nadu, Parangipettai Coast (Lat: 11.48) (Long: 79.77) INDIA

Literature Source(s)
  • Venkatraman, K; Srinivasan, M; Satyanarayana, CH and Prabhakar D (2002) Faunal diversity of Gulf of Mannar biosphere reserve Conservation area series 15 ZSI 77 pp; VIII pla Available at - NCL, Pune
  • Shanmugam, A; Rajagopal, S and Nazeer, RA Common bivalves of Parangipettai coast Available at - NIO, Goa
  • Nagabhushanam, AK and Krishnan, S (1993) Observations on the distribution of some of the marine organism inhabiting the inter-tidal zone along the western continental shelf of the Bay of Bengal, with particular reference to the Tamil Nadu coastal strip Records of the Zoological Survey of India 93(3-4) 449-490 Available at - ZSI, Pune
  • Pillai, CSG; Appukuttan, KK and Kaladharan, P (1999) Occurrence of submerged Pleistocene stony corals and marine molluscs at Vazhakala near Cochin and their significance on sea level changes Indian Journal of Marine Sciences CSIR, New Delhi 28 96-98 Available at - NIO, RC Kochi
  • Fernando, AS and Fernando, OJ (2002) A field guide to the common invertebrates of the east coast of India Centre of Advanced Study in Marine Biology 1-258 Available at - NIO, RC Kochi
  • Hosseinzadeh, H; Daghoghi, B and Rameshi, H (2001) Atlas of the Persian Gulf molluscs Oman sea fisheries research center, Oman 208 Available at - NIO, Goa

Page last updated on:2012-10-03

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