
1) Bivalvia
Found on
https://www.crosswordclues.com/clue/lamellibranchia

• (n. pl.) Alt. of Lamellibranchiata
Found on
http://thinkexist.com/dictionary/meaning/lamellibranchia/
La·mel`li·bran'chi·a La*mel`li*bran`chi*a'ta noun plural [ New Latin See lamella , and Branchia , Branchiate .] (Zoology) A class of Mollusca including all those that have bivalve shells, as the clams, oysters, mussels, etc. » They usually hav...
Found on http://www.encyclo.co.uk/webster/L/8
Lamellibranchia 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.
Found on http://www.wordinfo.info/words/index/info/view_unit/1142/
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