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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 Praecambridium ： ウィキペディア英語版 Praecambridium ''Praecambridium sigillum'' is an extinct organism that superficially resembles a segmented trilobite-like arthropod, though the majority of experts now place it within the Proarticulata. It is from the Late Precambrian of Ediacara Hills, Australia, about 555 million years ago. On average, ''P. sigillum'' had at least 5 pairs of segments, with each unit becoming progressively larger as they approach the cephalon-like head. ==Etymology== The generic name is a compound word, with the Latin prefix ''prae'' "before" and a reference to the Cambrian mollusc genus ''Cambridium'' Horny 1957, in reference to how the appearance of the various segments are reminiscent of the muscle-scars on the inner surface of the shells of ''Cambridium''. The specific name is from Latin ''sigillum'' "a sigil". 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「Praecambridium」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.