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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 Tylonautilus ： ウィキペディア英語版 Tylonautilus ''Tylonautilus'' is an extinct genus in the nautiloid order Nautilida from the Lower Carboniferous of Europe and Permian of Japan. ''Tylonautilus'' has a coiled shell with a subquadrate whorl section, evolutely coiled with all whorls showing. The outer rim, the venter, has a smooth median depression bordered on either side by thread-like lirae, followed by rows of nodes, radially arranged. The suture has broad ventral and lateral lobes, the siphuncle is central. ''Tylonautilus'' is a member of the Tainoceratidae which, with other related families, forms the nautiloid superfamily Tainocerataceae. As with most if not all tainoceratids, ''Tylonautilus'' was probably a bottom dweller that spent its time crawling over, or perhaps swimming close to, the seafloor. ==References== * Kümmel, B. 1964; Nautiloidea - Nautilida, in the Treatise on Invertebrate Paleontology, Part K Nautiloidea; Geological Society of America and University of Kansas press. 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「Tylonautilus」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.