Did you maybe mean Bivalvia?
Definitions
Century Dictionary and Cyclopedia
- A term formerly used for all the bivalve shells or lamellibranchiate mollusks, but now superseded by the class names Acephala, Conchifera, and Lamellibranchiata.
WordNet 3.0
- n. oysters; clams; scallops; mussels.
Examples
“' phylum mollusca '' with class [[bivalvia]] and [[gastropoda]], and contain subclass”
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bilby Mollusks! Sep 2, 2008
seanahan A class of mollusks containing scallops, oysters, clams, and mussels. see malacology for an exciting jaunt into the stunningly confusing world of taxonomy. Nov 8, 2007