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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 Crymocetus ： ウィキペディア英語版 Crymocetus ''Crymocetus'' is an extinct genus of plesiosaur from the Cretaceous Chalk Group of Sussex, England. Since its description, it has been seldom examined by subsequent authors, except when mentioned in discussions of Cretaceous plesiosaurs ==Taxonomy== ''Crymocetus'' was originally described as the new species ''Plesiosaurus bernardi'' by the legendary British paleontologist Sir Richard Owen in 1850.〔Owen, R., 1850, Description of the Fossil Reptiles of the Chalk Formation.〕 Its type specimen consisted of a large posterior cervical vertebra found in Cretaceous-aged chalk deposits in Sussex, England. However, the famous American paleontologist Edward Drinker Cope decided that ''P. bernardi'' warranted its own genus, which he named ''Crymocetus''.〔E. D. Cope. 1869. On the reptilian orders Pythonomorpha and Streptosauria. Proceedings of the Boston Society of Natural History 12:251-266〕 Despite Cope's action, nearly all authors tended to disregard Cope's generic name. ''Crymocetus'' was considered a species of ''Cimoliasaurus'' by Richard Lydekker,〔Lydekker., R., 1889, Catalogue of the fossil Reptilia and Amphibia in the British Museum (Natural History). Part II. Containing the orders Ichthyopterygia and Sauropterygia: London, Printed by Order of the Trustees of the British Museum, p. 307pp.〕 with ''Plesiosaurus ichthyospondylus'' and tentatively ''Plesiosaurus balticus'' as synonyms. Later authors considered ''Crymocetus'' to be either a pliosaur or a rhomaleosaurid.〔Welles, S. P., 1962, A new Species of Elasmosaur from the Aptian of Colombia and a review of the Cretaceous Plesiosaurs: University of California Publications Bulletin Department of Geological Sciences, v. 44, p. 1-89.〕〔Perrson, P. O., 1963, A revision of the classification of the Plesiosauria with a synopsis of the Stratigraphical and geographical distribution of the Group: Lunds Universitets Arksskrift. N. F. Avd. 2, band 59, n 1, p. 60.〕 In any case, ''Crymocetus'' is in need of restudy along with other plesiosaurs from Middle Cretaceous deposits in the UK. 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「Crymocetus」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.