Image National Museum Wales - External view of Thracia villosiuscula valve. Image width ca 3 cm.
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Thracia villosiuscula is not listed under any importance categories.
|Phylum||Mollusca||Snails, slugs, mussels, cockles, clams & squid|
|Class||Bivalvia||Clams, cockles, mussels, oysters, and scallops|
|Recorded Distribution in Britain and Ireland||Reported from most parts of the British Isles but uncommon. The extent of distribution is uncertain because of the difficulty of separating Thracia villosiuscula from Thracia phaseolina.|
|Habitat information||Thracia villosiuscula burrows deeply in coarse sands and coarse fine gravels from the lower shore and shallow sublittoral to depths of about 55 m.|
|Description||Thracia villosiusucla is a rather flat sub-rectangular bivalve. It can be up to 3 cm long and shell white in colour and quite brittle. The surface of the shell has fine granulation and this can be seen with a X10 hand lens. The shiny covering layer of shell (periostracum) can be brown and sometimes reddish-brown. The posterior margin is obliquely truncated and slightly gaping. The beak (umbo) of the left valve sits in a hole in the beak of the right valve, and the right valve is slightly larger and more convex than the left. The bivalve does not contain either cardinal or lateral teeth.|
|Additional information||Difficult to distinguish from Thracia phaseolina but can be told apart by finely granular shell surface, granulations visible with X10 hand lens.|
This review can be cited as follows:
Anna Neish 2005. Thracia villosiuscula. A bivalve mollusc. Marine Life Information Network: Biology and Sensitivity Key Information Sub-programme [on-line]. Plymouth: Marine Biological Association of the United Kingdom. [cited 24/05/2013]. Available from: <http://www.marlin.ac.uk/speciesinformation.php?speciesID=4469>