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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 Huronia (mollusk) ： ウィキペディア英語版 Huronia (mollusk) ''Huronia'' is an actinocerid genus included in the Huroniidae along with ''Discoactinoceras'' and ''Huroniella'',(Teichert 1964). ''Huronia'' is characterized by long siphuncle segments with the free part of the connecting rings only slightly inflated and by a narrow central canal and strongly curved radial canals located in the anterior part of each siphuncle segment == Ancestry == Teichert, (1964) indicated ''Huronia'' as being derived from the upper Middle Ordovician ''Discoactinoceras'', whose ancestry lay in the direction of ''Polydesmia'', once considered the prototypical actinocerid. Flower, (1968) on the other hand, showed that ''Huronia'' is derived from ''Actinoceras'' and split off from ''Lambeoceras'' during Red River time, near the start of the Late Ordovician, precluding the inclusion of ''Discoactinoceras'' 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「Huronia (mollusk)」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.