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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Phthipodochiton ： ウィキペディア英語版 Phthipodochiton ''Phthipodochiton'' is an extinct mollusk, known from several fossils from the upper Ordovician fauna of the Lady Burn Starfish beds of Girvan, Scotland.〔 It shows a mixture of aplacophoran body plan and polyplacophoran-like valves, and it is an informative fossil in the evolution of aculiferan mollusks.〔 It was previously classified under the genus ''Helminthochiton'', but it has been reassigned to its own genus in 2012.〔 ==Morphology== ''Phthipodochiton'' body is worm-like, with eight polyplacophoran-like valves but no true foot. Head and tail valves are slightly smaller than the intermediate ones.〔 The only ornaments on the valves appear to be growth lines.〔 The body is also covered by a sheet of spicules ; no radula has been preserved.〔 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「Phthipodochiton」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.