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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 Helminthopsis ： ウィキペディア英語版 Helminthopsis ''Helminthopsis'' is the ichnogenus of a type of trace fossil that is found preserved on the bedding planes of fine-grained sedimentary rocks. It is characterized by short, curvilinear, non-branching, parallel-sided, unlined traces on bedding surfaces. It is thought to represent the submarine feeding trails of an invertebrate organism that worked the surface of muddy substrates in search of food.〔〔 Because ''Helminthopsis'' traces never cross over themselves, the ichnogenus is distinguished from similar traces assigned to the ''Gordia'' ichnogenus.〔 The similar sounding, but now obsolete, ichnogenus ''Helminthoida'' refers to a somewhat similar trace characterized by regular, back-and-forth meanders, whereas ''Helminthopsis'' traces are irregular.〔 ==See also== * Trace fossil * Ichnology 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「Helminthopsis」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.