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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 Guizhouichthyosaurus ： ウィキペディア英語版 Guizhouichthyosaurus ''Guizhouichthyosaurus'' ("Guizhou Fish Lizard") is an extinct genus of Ichthyosaur which existed during the lower Carnian stage of the Late Triassic in southwest China. The genus contains the single species ''Guizhouichthyosaurus tangae''.〔''Cranial Osteology of Guizhouichthyosaurus tangae (Reptilia: Ichthyosauria) From the Upper Triassic of China'' (2006). By Michael W. Maisch, Xin-Ru Pan, Zuo-Yu Sun, Tao Cai, Da-Peng Zhang, Jia-Lin Xie. ()〕 It had been referred to the genus ''Shastasaurus'' in the past, but later study showed that it is likely distinct, since it lacks the characteristically short snout of that genus. Originally named as a species of Cymbospondylus (''Cymbospondylus asiaticus'') in 2002, and again in 2003 with Panjiangsaurus (''Panjiangsaurus epicharis'') before finally being placed within its own genus.〔Sander, P.M., Chen X., Cheng L. and Wang X. (2011). "(Short-Snouted Toothless Ichthyosaur from China Suggests Late Triassic Diversification of Suction Feeding Ichthyosaurs. )" ''PLoS ONE 6(5)'': e19480. PMID 21625429〕 Size estimates based on the preserved collection of 86 presacral vertebrae and 110 caudal vertebrae brings its total length to . ==Appearance== Following the Permian-Triassic extinction event (also colloquially known as The Great Dying), the decline and disappearance of eugeneodonts and giant nautiloids left an environmental niche empty that many marine reptiles began to fill. ''Guizhouichthyosaurus'' was one of the largest marine vertebrates of the time, whose only predators composed of large macro-predatory Ichthyosaurs (that of which preferred to hunt smaller ichthyosaurs). The rise of the shelled cephalopods (ammonites that survived the Permian-Triassic extinction event, along with the appearance of belemnites) gave ichthyosaurs an abundant food supply with little competition.''Guizhouichthyosaurus'' and other ichthyosaurs began to adapt to hunting these cephalopods through larger eyes, and thick bodies, to handle the pressures of diving deep to hunt for their prey. 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「Guizhouichthyosaurus」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.