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lamellibranchiata |
1 definition found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Lamellibranchia \La*mel`li*bran"chi*a\, Lamellibranchiata \La*mel`li*bran`chi*a"ta\, n. pl [NL. See {lamella}, and {Branchia}, {Branchiate}.] (Zo["o]l.) A class of Mollusca including all those that have bivalve shells, as the clams, oysters, mussels, etc Note: They usually have two (rarely but one) flat, lamelliform gills on each side of the body. They have an imperfectly developed head, concealed within the shell, whence they are called {{Acephala}}. Called also {Conchifera}, and {Pelecypoda}. See {Bivalve}.
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