Pholas (Monothyra) orientalis   Gmelin  (Piddock)
Organism information awaits expert curation
Class: Bivalvia

Size: Length 51.88-108.50 mm; height 17.35-34.95 mm

Shell elongate, large, white and rather thin and fragile and narrowed posteriorly. It gradually widens towards the umbo; dorsal margin of the shell is reflected a little over the upper surface about the umbo; sculpture consists of strong, nodular, radial ribs traversing the anterior part of the shell; posterior part of the surface smooth , faint concentric growth striae. Shell strongly inequilateral and elongated; two dorsal accessory plates.

Synonym (s)
Pholas orientalis Gmelin, 1791
Pholas orientalis Satyamurti, 1956

Common Name (s)
Economic Importance and Threats



• Orissa, Chandipur INDIA (Record: 07/03/1939)
• Orissa, Bagda INDIA (Record: 22/01/1972)
• Tamil Nadu, Chennai INDIA
• Kerala, Kochi INDIA
• Tamil Nadu, Nagapattinam INDIA
• Tamil Nadu, Krusadai Island (Lat: 9.23) (Long: 79.22) INDIA
• Tamil Nadu, Pamban (Lat: 9.29) (Long: 79.21) INDIA

Literature Source(s)
  • 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
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) 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 -
  • Satyamurti, ST (1956) The Mollusca of Krusadai island in the Gulf of Mannar II.- Scaphopoda, Pelecypoda and Cephalopoda Bulletin of the Madras Government 1(2) 202 pp Available at - NIO, Goa

Page last updated on:2013-01-18

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