Mactra (Coelomactra) violacea   Gmelin  (Clam)
Organism information awaits expert curation
Class: Bivalvia

Size: Length 69.35-79.85 mm; width 31.25-60.95 mm; height 18.75-36.85 mm

Color: Violet

Shell large, inequilateral and inflated. Umbo is prominent and elevated. Anterior part is longer than the posterior part. Anterior and posterior margin is broad and rounded. It is sculptured with fine concentric striae and conspicuous growth lines.

This species closely resembles Mactra turgida but differs in having low umbo, more transversely ovate shape, thin and violet color.

Synonym (s)
Mactra violacea Chemnitz, 1782
Mactra violacea Gmelin, 1790
Mactra violacea Gmelin, 1791
Mactra violacea Satyamurti, 1956

Common Name (s)
Economic Importance and Threats

Habitat:  Muddy,Coastal


• Andaman and Nicobar Islands, Andaman Islands (Lat: 12.5) (Long: 92.75) INDIA
• Orissa INDIA (Record: 1992)
• Tamil Nadu INDIA (Record: 1992)
• Bay of Bengal (Record: 29/02/1924)
• West Bengal, Digha INDIA (Record: 04/09/1964, 20/12/1965, 29/09/1979, 27/03/1983, 17/05/1985, 19/03/1985)
• West Bengal, Medinipur INDIA (Record: 1992)
• West Bengal, South 24 Parganas INDIA (Record: 1992)
• Andaman and Nicobar Islands INDIA (Record: 1992)
• Tamil Nadu, Kundugal Point INDIA (Record: 1991)
• Orissa, Chandbali INDIA (Record: 07/03/1939)
• Orissa, Chandipur INDIA (Record: 07/03/1939, 03/01/1962-05/01/1962)
• West Bengal, Sagar Island INDIA (Record: 1991)
• Tamil Nadu, Pamban INDIA (Record: 1991)
• Tamil Nadu, Coromandel Coast INDIA (Record: 1991)
• Andaman and Nicobar Islands, Andamans INDIA (Record: 1991)
• West Bengal, Sandheads INDIA (Record: 20/06/1924, 1991)
• West Bengal, Digha Coast INDIA

Literature Source(s)
  • OBIS Indo-Pacific molluscan database Available at -
  • Subba Rao, NV; Dey, A and Barua, S (1992) Estuarine and marine molluscs Fauna of West Bengal Part 9 (State fauna series 3) ZSI, Calcutta 129-268 Available at - NIO, Goa
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -
  • Rao, NVS; Rao, KVS and Maitra, S (1991) Marine molluscs State fauna series 1: Fauna of Orissa Zoological Survey of India, Calcutta Part 3 1-175 Available at - NIO, Goa
  • Dey, M and Mitra, A (2005) Molluscan community around Digha coast, West Bengal, India Journal of Environment and Sociobiology Social Environmental and Biological Association, Kolkata, India 2(1&2) 43-47 Available at - NIO, Goa

Page last updated on:2011-12-15

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