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Nuculanoida
Nuculanoida is an order of very small saltwater clams, marine bivalve mollusks in the subclass Protobranchia. ==Description== These bivalves are distinguished by the presence of relatively primitive, "protobranchiate" gills. There are a row of short teeth along the hinge of the shell. The shells are often internally nacreous.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Nuculanoida」の詳細全文を読む
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