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Cyrtopleura costata: Angelwing Clam

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Description: Photographs and information on this species, including its taxonomy, description, habitat, distribution, life history, population biology, physical tolerances, community ecology and special status.
Large specimen of an adult Angelwing  Group of aquacultured angelwing clams.  Photo courtesy of L. Creswell, HBOI.    , is a large sand-burrowing clam in the Family Pholadidae. Its valves are generally equal in size and white in color, with shades of pink sometimes observed. Body shape is oval and elongated, with narrowing of the posterior end. Valves have umbones 1/4 the shell length from the anterior end which are covered by a chitinous plate. Valves are patterned with radial riblets, which are sharp and angular in the anterior, and broader in the posterior.  Inside the valves, behind the umbones, is a thick, winged plate that lies transverse to the plane of the valves. 
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activated: 19-Jun-1992
last updated: 29-May-2013
expires: 31-Jul-2014