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Myoida
Myoida is an order of saltwater clams, marine bivalve molluscs in the subclass Heterodonta. The order includes such bivalves as soft-shell clams, geoducks, and shipworms. ==Description== These are burrowing molluscs, with well-developed siphons. The shell is relatively soft, and lacks a nacreous layer. Some species have a single cardinal tooth.
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「Myoida」の詳細全文を読む
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