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Nuculoida


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(class Bivalvia, subclass Palaeotaxodonta)

An order of bivalves which have a taxodont hinge and equivalve, aragonitic shells. They are isomyarian, the ligament generally amphidetic, and the gills are protobranchiate. The foot is grooved. Adults lack a byssus. Nuculoids are small, infaunal, labialpalp feeders, which first appeared in the Ordovician.

Subjects: Zoology and Animal Sciences.


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