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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 Matthevia ： ウィキペディア英語版 Matthevia |image=Matthevia.JPG |image_caption = Plates of ''Matthevia''. Coin: 19 mm diameter | authority = Walcott, 1885 }}''Matthevia'' is a Cambrian mollusc, perhaps related to the chitons. It consists of repeated monoplacophoran-like shells; according to one hypothesis, chitons arose when these tall shells began to overlap over the generations. The tall element of the shell was retained and forms the tips of modern chiton plates.〔 There are distinct head, 'centre', and tail valves, which occur approximately in the ratio 1:5:1 — suggesting a seven-plated configuration. ==References== 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「Matthevia」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.