
• (n. pl.) A class of Mollusca including all those that have bivalve shells, as the clams, oysters, mussels, etc.
Found on
http://thinkexist.com/dictionary/meaning/lamellibranchiata/

<zoology> A class of Mollusca including all those that have bivalve shells, as the clams, oysters, mussels, etc. ... 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. ... Synonym: Conchifera, and Pelecyp...
Found on
http://www.encyclo.co.uk/local/20973

Lamellibranchiata (Conchifera) is a class of Phylum Mollusca. They are the mussels, oysters, scallops etc. The head is reduced and the mantle encloses the body and secretes a bivalved shell.
Found on
http://www.probertencyclopaedia.com/browse/BL.HTM
No exact match found.