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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 Pseudorthoceratidae ： ウィキペディア英語版 Pseudorthoceratidae Pseudorthoceratidae is an extinct family of actively mobile aquatic carnivorous cephalopods belonging to the subclass Orthoceratoidea endemic to what would be North America, Asia, and Europe during the Silurian living from 460.5—251 Ma, existing for approximately .〔(PaleoBiology Database: Pseudorthoceratidae, basic info )〕 In life, these animals may have been similar to the modern squid, except for the long shell. The internal structure of the shell consists of concavo-convex chambers linked by a centrally-placed tube called a siphuncle. ==Taxonomy== Pseudorthoceratidae was named by Flower and Caster (1935). It was assigned to Pseudorthocerataceae by Sweet (1964) and Teichert et al. (1964); to Orthocerida by Frey (1995); and to Pseudorthocerida by Barskov (1968) and Kröger (2008).〔W. C. Sweet. 1964. Nautiloidea–Orthocerida. In C. Teichert et al. (ed.), Treatise on Invertebrate Paleontology (K) Mollusca 3 216-261〕〔C. Teichert, B. Kummel, W.C. Sweet, H.B. Stenzel, W.M. Furnish, B.F. Glenister, H.K. Erben, R.C. Moore, and D.E. Nodine Zeller. 1964. Cephalopoda - general features - Endoceratoidea - Actinoceratoidea - Nautiloidea - Bactritoidea. Treatise on Invertebrate Paleontology K(3):1-519.〕〔B. Kröger. 2008. Nautiloids before and during the ammonoid origin in a Siluro–Devonian section of the Tafilalt (Morocco). Special Papers in Palaeontology 79:1-110.〕 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「Pseudorthoceratidae」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.