Donax (Hecuba) scortum   (Linnaeus)  1758 (Clam)
Organism information awaits expert curation
Class: Bivalvia
Order:Euheterodonta incertae sedis

Image copyrights: dkimages

Size: Length 23.24-79.4 mm; height 15.95-46.34 mm; width 11-34.15 mm

Color: Dirty white, violet in the posterior region.

Shell triangularly oblong, gibbous. Umbos posterior, elevated and pointed. Anterior margin convex; posterior margin convex with a depressed notch; anterior-dorsal margin straight and gradually sloped with a sharp canal at the side; posterior-dorsal margin slightly concave; posterior margin short and pointed. Sculpture with prominent concentric striae, lamellae-like on the anterior end, thinner on the posterior, more or less squamately spinose on the angle. Radial striae prominent and originated from umbos in divergent manner. Ligament short, dark brown color. Lunule very prominent, wide and equal on both the valves.
In the left valve the cardinal complex consists of a thick anterior tooth and a thin laminated posterior tooth; lateral well developed; posterior lateral stronger than anterior and more prominent than the cardinal complex. In the right valve the cardinal complex consists of a nob-like bifid cardinal tooth; laterals poorly developed and form a groove to accommodate the lateral teeth of the left valve to form ball and socket joint.
Adductor muscle scars poorly developed. Anterior adductor scar elongated, semilunar shaped and posterior adductor almost rectangular shaped. Sinus equal on both valves, sinus rises from base of a posterior adductor scar straight and extends upto the half of the shell, with rounded anterior end and falls obliquely to the pallial line and in confluence with it.

Synonym (s)
Venus scortum Linnaeus 1758
Donax pubescens Linnaeus 1758
Donax scortum Chemintz 1782
Donax scortum Reeve 1854
Donax (Hecuba) scortum Roemer in Martinii-Chemnitz 1869
Donax scortum Gravely 1942
Donax scortum Hornell 1952
Donax scortum Satyamurti 1956
Donax (Hecuba) scortum Subba Rao and Dey 1986
Donax (Hecuba) scortum Melvill 1928

Common Name (s)
Economic Importance and Threats

Habitat:  Coastal


• Orissa, Ganjam Coast INDIA
• West Coast, Malabar (Lat: 10) (Long: 72.65) INDIA
• Andhra Pradesh, Godavari Estuary (Lat: 16.63) (Long: 82.3) INDIA
• Tamil Nadu, Shingle Island (Lat: 9.23) (Long: 79.23) INDIA
• Orissa, Mahanadi Estuary (Lat: 20.32) (Long: 86.75) INDIA
• Maharashtra, Mumbai (Lat: 18.98) (Long: 72.83) INDIA
• Gujarat, Gulf of Kachchh (Lat: 22.6) (Long: 69.5) INDIA
• Maharashtra, Ratnagiri INDIA
• Pondicherry INDIA (Record: 1986, 1992)
• Goa INDIA (Record: 1986, 1992)
• Andhra Pradesh INDIA (Record: 1986, 1992)
• Gujarat INDIA (Record: 1986, 1992)
• Karnataka INDIA (Record: 1986, 1992)
• Kerala INDIA (Record: 1986, 1992)
• Orissa INDIA (Record: 1986, 1992)
• Tamil Nadu INDIA (Record: 1986, 1992)
• West Bengal INDIA
• SRI LANKA (Record: 1986, 1992)
• Orissa, Chilika Lake INDIA (Record: 1985, 1986)
• Orissa, Arakuda INDIA (Record: 1985)
• West Bengal, Digha INDIA (Record: 10/03/1966, 21/09/1983, 27/09/1984, 12/07/1984, 1991)
• West Bengal, Medinipur INDIA (Record: 1992)
• Maharashtra INDIA (Record: 1992)
• Persian Gulf (Record: 1992)
• PAKISTAN (Record: 1992)
• MYANMAR (Record: 1992)
• West Bengal, Old Digha INDIA (Record: 07/2000-06/2001)
• West Bengal, Sankarpur INDIA (Record: 07/2000-06/2001)
• Tamil Nadu, Kundugal Point INDIA (Record: 1991)
• Orissa, Chandipur INDIA (Record: 04/11/1962-06/11/1962, 01/12/1984)
• Orissa, Puri INDIA (Record: 08/06/1938)
• Orissa, Chhatrapur INDIA (Record: 10/11/1962)
• Andhra Pradesh, Vishakhapatnam INDIA (Record: 1991)
• Tamil Nadu, Chennai INDIA (Record: 1991)
• Tamil Nadu, Krusadai Island INDIA (Record: 1991)
• Tamil Nadu, Shingle Island INDIA (Record: 1991)
• Kerala, Malabar Coast INDIA (Record: 1991)
• Maharashtra, Mumbai INDIA (Record: 1991)
• Gujarat, Gulf of Kachchh INDIA (Record: 1991)

Literature Source(s)
  • Rao, NVS; Rao, KVS and Manna, RN (1995) Mollusca Wetland ecosystem series 1: Fauna of Chilka lake ZSI, Calcutta 391-468 Available at - NIO, Goa
  • (2001) Fauna of Godavari estuary, Andhra Pradesh Estuarine ecosystem series 4 ZSI, Kolkata 1-166 Available at - ZSI, Pune
  • Zoological Survey of India (Eds.) (1998) Fauna Of Mahanadi estuary, Orissa Estuarine ecosystem series no 3 ZSI, Kolkata 1-218 Available at - ZSI, Pune
  • Ramakrishna; Sarkar, J and Talukdar, S (2003) Marine invertebrates of Digha coast and some recomendations on their conservation Records of the Zoological Survey of India ZSI, Kolkata 101(3-4) 1 Available at - NCL, Pune
  • Ray, HC (1977) Contribution to the knowledge of the molluscan fauna of Maungmagan, Lower Burma (with descriptions of one new genus and species of the Family Turridae (Gastropoda) 8) Contribution to the knowledge of the molluscan fauna of Maungmagan, Lower Burma (with descriptions of one new genus and species of the Family Turridae (Gastropoda) 8) Indian Museum, Calcutta 1-150 Available at - Zoological Records (Burma marine)
  • 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 -
  • Subba Rao, NV and Dey, A (1986) Contributions to the knowledge of Indian marine molluscs 2. Family Donacidae Records of the Zoological Survey of India. Occasional paper no. 91 ZSI, Calcutta 30 pp Available at - NIO, Goa
  • Khalua, RK; Chakravarty, G and Chakraborty, SK (2003) Annotated list of molluscs from the coastal tract of Midnapore District, West Bengal, India Journal of the Marine Biological Association of India The Marine Biological Association of India, Cochin 45(2) 245-249 Available at - NIO, Goa
  • 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

Page last updated on:2009-10-12

Back to Search