Paphia undulata   (Born,  1780) (Clam)
Organism information awaits expert curation
Class: Bivalvia

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Size: Maximum shell length 6.5 cm, commonly to 5 cm.

Color: Outside of shell cream to light mauve, with a net-like pattern of tan zigzag lines. Umbones often more or less tinged light purple. Lunule and escutcheon whitish, with transverse streaks of purplish brown. Interior white, generally with a mauve hue in the umbonal cavity.

Shell moderately inflated, transversely elongate, elliptical-ovate in outline. Umbones anterior to midline of shell. Anterodorsal and posterodorsal margins straightish and gently sloping. Ventral margin broadly rounded. Lunule lanceolate, delicately outlined by a finely impressed line. Outer surface smooth and glossy, with fine, slightly oblique, undulating grooves crossing the shallow concentric growth marks and disappearing towards anterior and posterior ends of shell. Hinge narrow, with 3 cardinal teeth concentrated under the umbo of each valve, but without lateral teeth. Pallial sinus deep, markedly ascending, rounded in front. Internal margins smooth.

Synonym (s)
Paratapes scordalus Iredale, 1936
Paphia textile (Gmelin, 1791)
Venus undulata Born, 1788
Venus undulata Born, 1780
Paphia undulata Subrahmanyam et. al., 1949
Paphia undulata Fischer Piette, 1976

Common Name (s)
Economic Importance and Threats
Importance:  Commercial
(Heavily exploited for both domestic demand and export.)

Habitat:  Sandy, Muddy


• West Bengal, Sundarbans INDIA
• Orissa, Palur Canal INDIA (Record: 1986)
• Orissa, Chhatrapur INDIA (Record: 24/11/1962)
• West Bengal, Hugli INDIA
• Tamil Nadu, Chennai INDIA
• Tamil Nadu, Parangipettai INDIA
• Tamil Nadu, Tuticorin INDIA
• Maharashtra, Mumbai INDIA
• Andaman and Nicobar Islands, Andamans INDIA

Literature Source(s)
  • Mandal, AK and Nandi, NC (1989) Fauna of Sundarban mangrove ecosystem, West Bengal, India Fauna of Conservations 3 35431 Available at - NIO, Goa
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) 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 -
  • Frank, B (1998) Available at -
  • 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
  • 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
  • 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

Page last updated on:2012-07-31

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