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Phylum Mollusca > Class Bivalvia > Family Arcidae
Barbatia ark clam
Barbatia sp.
Family Arcidae
updated Oct 2016

Where seen? This little clam is commonly seen stuck under stones on many of our shores, sometimes a few clustered together. But it is often overlooked as its 'hairy' shell camouflages it well.

Features:
About 2.5cm long. The sturdy two-part shell is oval with fine ribs. There is usually a layer of fine brown hairs (called the periostracum) covering the shell. The hairs grow particularly thickly towards the shell opening. The animal is usually firmly attached to the underside of stones and rubble, usually with the shell opening facing the hard surface.

St John's Island, Mar 05

St. John's Island, Feb 11

Barbatia ark clams on Singapore shores

Photos of Barbatia ark clams for free download from wildsingapore flickr

Distribution in Singapore on this wildsingapore flickr map


Changi, Dec 10

Tuas, Mar 06

Labrador, Oct 14
Photo shared by Loh Kok Sheng on flickr.

Links

  • Barbatia species in the Bivalves section by J.M. Poutiers in the FAO Species Identification Guide for Fishery Purposes: The Living Marine Resources of the Western Central Pacific Volume 1: Seaweeds, corals, bivalves and gastropods on the Food and Agriculture Organization of the United Nations (FAO) website.

References

  • Tan Siong Kiat and Henrietta P. M. Woo, 2010 Preliminary Checklist of The Molluscs of Singapore (pdf), Raffles Museum of Biodiversity Research, National University of Singapore.
  • Tan, K. S. & L. M. Chou, 2000. A Guide to the Common Seashells of Singapore. Singapore Science Centre. 160 pp.
  • Abbott, R. Tucker, 1991. Seashells of South East Asia. Graham Brash, Singapore. 145 pp.
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