Arca avellana [Status Unaccepted]   Lamarck,  1819 (Clam)
Organism information awaits expert curation
Class: Bivalvia

Image copyrights: Moorea Biocode

Size: Maximum shell length 7 cm, commonly to 4 cm.

Color: Shell whitish with indistinct brown markings.

Shell is moderate-sized, with strongly inflated valves and an oblong or slightly irregular outline, the ventral margin being usually feebly concave posteriorly; anterior margin rounded while posterior is straight and obliquely truncated. Shell is distinguished by a strong keel at its posterior end, raised umbo, broad ligamental area, strong and coarse sculpture behind the keel. the hinge teeth are very fine; posterior margin of the valves present a toothed appearance interiorly owing to the presence of the strong external ribs.

Synonym (s)
Arca arabica Philippi, 1847
Arca cuneata Reeve, 1844
Arca maculata (Sowerby, 1833)
Arca avellana Lamarck, 1819
Arca (Navicula) avellana Prashad, 1932

Common Name (s)
• Hazelnut Ark (English)
Economic Importance and Threats
Importance:  Commercial
(Locally collected for food. The shell is also used for shellcraft.)

Habitat:  Reef Associated, Rocky, Sandy


• Andhra Pradesh, Off Visakhapatnam Coast (Lat: 17.7) (Long: 83.3) INDIA
• Andaman and Nicobar Islands, Andaman Islands (Lat: 10) (Long: 93) INDIA
• Lakshadweep INDIA
• Gujarat, Veraval INDIA
• Maharashtra, Mumbai INDIA
• Tamil Nadu, Rameswaram INDIA
• Tamil Nadu, Pamban INDIA
• Tamil Nadu, Krusadai Island INDIA
• Andaman and Nicobar Islands INDIA
• Tamil Nadu, Krusadai Island (Lat: 9.23) (Long: 79.22) INDIA

Literature Source(s)
  • (2002) Lakshadweep Islands biodiversity strategy and action plan (Version: 3)
  • 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
  • Sarma, ALN (1977) The phytal fauna of Sargassum off Visakhapatnam coast Journal of the Marine Biological Association of India Marine Biological Association of India, Ernakulam, Cochin-682 011, India 16(3) 741-755 Available at - NIO, RC, Kochi
  • Oliver, PG; Holmes, AM; Killeen, lJ and Wood, H (2004) Annotated checklist of the marine Bivalvia of Rodrigues Journal of Natural History Taylor and Francis 38 3229-3272 Available at -
  • Tan, KS and Kastoro, WW (2004) A small collection of gastropods and bivalves from the Anambas and Natuna Islands, south China Sea The Raffles Bulletin of Zoology 11 47-54
  • 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 -
  • Surya Rao, KV and Subba Rao, NV (1991) Mollusca State fauna series 2: Fauna of Lakshadweep ZSI, Calcutta 273-362 Available at - NIO, Goa
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -
  • CalPhotos 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:2013-01-07

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