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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 Rugoconites ： ウィキペディア英語版 Rugoconites ''Rugoconites'' is a fossil member of the Ediacaran biota that takes the form of a circular to oval impression preserved in high relief, six or more centimeters in diameter. The fossils are surrounded by frills that have been interpreted (Wade 1972) as sets of tentacles. The bifurcating radial ribs, spreading from a central dome, serve to distinguish this genus from the very similar ''Paleophragmodictya'', and may represent the channels of the gastrovascular system (Fedonkin & Cope 1985). Speculation that the fossils may represent sponges (Gehling 1996) is not accepted by Sepkoski ''et al.'' (2002), who interpret the organism as a jellyfish-like cnidarian; it is believed that, in common with ''Ovatoscutum'', ''Rugoconites'' were free-swimming (Waggonner 1995). Cnidarian affinities are not necessarily refuted by Ivantstov & Fedonkin (2002), who suggest that ''Rugoconites'' may possess tri-radial symmetry and be a member of the Trilobozoa. ''Rugoconites'' have been reported in clusters; this may represent a social/colonial way of life, or simply accumulation by the action of currents, sea-floor processes, or possibly preservational conditions (Droser 2007). ==See also== List of Ediacaran genera 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「Rugoconites」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.