see Bivalvia.

Online Dictionary of Invertebrate Zoology. . 2005.

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  • bivalves — n., n. pl. [L. bis, two; valvae, a folding door] A class of marine, estuarine or freshwater bivalve mollusks, in which the body is enclosed within two calcareous valves, or shells; other names for this class are Acephala, Conchifera, Pelecypoda,… …   Dictionary of invertebrate zoology

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