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Apogastropoda : ウィキペディア英語版 | Apogastropoda
Apogastropoda was previously used as a major taxonomic grouping of sea snails, marine gastropod molluscs. This infraclass mostly consisted of marine limpets and operculate snails. At least 20,000 species were considered to exist within the two clades that were included, Heterobranchia and Caenogastropoda.〔http://www.britannica.com/EBchecked/topic/29828/Apogastropoda〕 ==Description== Gastropods that were placed in this taxon have bifurcate tentacle nerves and two pedal commissures.〔
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「Apogastropoda」の詳細全文を読む
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