Circe scripta   (Linnaeus,  1758) (Clam)
Organism information awaits expert curation
Class: Bivalvia

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Size: Maximum shell length 5 cm, commonly to 4 cm.

Color: Outer coloration of shell very variable, whitish or pale grey to cream, with various patterns of darker markings which vary from being weak and interrupted, to broad and dense. Lunule and escutcheon often flecked with brown. Interior whitish with brown or purplish blotching.

The shell is markedly flattened, moderately thin and evenly rounded anteriorly and ventrally, but the posterior margin is distinct truncate and angular above. Umbones small, submedian, flattened, on top of the strongly sloping anterodorsal and posterodorsal margins. Ventral half of shell rounded, often somewhat truncate at posterior margin. Lunule flattened, lanceolate, set off by a thin groove. Escutcheon narrow and elongate, poorly distinct. Outer sculpture mainly concentric, with numerous, low and rounded ridges, vanishing towards the umbones and crossed by diverging radial riblets on anterodorsal and posterodorsal areas. Ligament sunken in posterodorsal margin. Hinge plate rather high and short, with 3 cardinal teeth in each valve, and a well-developed anterior lateral tooth in left valve, fitting in a deep socket with beveled margins in right valve. Interior of shell smooth, with a low radial undulation running from umbonal area to posteroventral margin. Pallial sinus very shallow, reduced to a slight depression under the posterior adductor scar. The impressions of the adductor muscles are very prominent and their outer margins are marked off as distinct, raised ridges. Internal margins flattened, smooth and thin.

Synonym (s)
Circe albida Deshayes, 1853
Circe fulgurata Reeve, 1863
Circe oblonga Deshayes, 1853
Circe personata Deshayes, 1853
Circe robillardi Romer, 1869
Circe violacea Schumacher, 1817
Venus scripta Linnaeus, 1758
Venus stutzeri Donovan, 1824

Common Name (s)
• Script Venus
Economic Importance and Threats
Importance:  Commercial
(Collected for food at subsistence level and sold in local markets.)

Habitat:  Demersal, Sandy


• Tamil Nadu, Devipatnam INDIA
• Gujarat, Gulf of Kachchh (Lat: 22.6) (Long: 69.5) INDIA
• Tamil Nadu, Parangipettai Coast (Lat: 11.48) (Long: 79.77) INDIA
• Red Sea
• Tamil Nadu, Dhanushkodi INDIA
• Tamil Nadu, Mandapam INDIA
• Tamil Nadu, Gulf of Mannar (Lat: 78.13) (Long: 8.58) INDIA (Record: 01/1994-12/1995)
• Tamil Nadu, Gulf of Mannar (Lat: 79.5) (Long: 9.33) INDIA (Record: 01/1994-12/1995)

Literature Source(s)
  • Tikadar, BK; Daniel, A and Subbarao, NV (1986) Sea shore animals of Andaman and Nicobar Islands The Director, ZSI, Kolkatta 188 Available at - ZSI, Pune
  • (2001) Invertebrate zoology collections Available at -
  • Subba Rao, NV and Dey, A (2000) Catalogue of marine molluscs of Andaman and Nicobar Islands Occasional paper no 187 Records of the Zoological Survey of India ZSI 1-323 Available at - NCL, Pune
  • 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
  • Subba Rao, NV and Sastry, DRK (2005) Fauna of Marine National Park, Gulf of Kuchchh (Gujarat) ZSI 79 pp Available at - NCL, Pune
  • 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
  • Sealifebase Available at -
  • Poutiers, JM (1998) Bivalves FAO species identification guide for fishery purposes. The living marine resources of the western central Pacific. Volume 1: Seaweeds, corals, bivalves and gastropods FAO, Rome 1 686 pp Available at -
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -
  • Available at -
  • 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 -
  • 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 -
  • Hameed, PS and Somasundaram, SSN (1998) A survey of bivalve molluscs in Gulf of Mannar, India Indian Journal of Fisheries Indian journal of Fisheries for the Indian Council of Agricultural Research, Kochi, India 45(2) 177-181 Available at -

Page last updated on:2012-03-09

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