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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 Styrionautilus ： ウィキペディア英語版 Styrionautilus ''Styrionautilus'' is a nautiloid genus and first of the Clydonautilidae with a range extending from the Middle Triassic, Anisian to the Upper Triassic, Norian. Its fossils found in North America (Nevada), Europe, and Timor. In general form ''Styrionautilus'' is similar to other clydonautilids, smooth and involute. The suture however is more primitive. The ventral saddle is straight across without modification of a median lobe. ''Styrionautilus'' may be derived from ''Indionautilus'' or similar form included in the Liroceratidae. In turn ''Styrionautilus'' is the likely ancestor of ''Proclydonautilus'', ''Cosmonautilus'', and/or ''Callaionautilus'' ==References== *Bernhard Kummel, 1964. Nautiloidea-Nautilida. Treatise on Invertebrate Paleontology, Part K. Geological Society of America. *(''Styrionautilus'' ) in Fossilworks gateway. * J.J. Sepkoski 2002 (Online list of cephalopod 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「Styrionautilus」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.