翻訳と辞書 Words near each other ・ Palaeoagaracites ・ Palaeoaldrovanda ・ Palaeoamasia ・ Palaeoamasiidae ・ Palaeoaplysina ・ Palaeoapterodytes ictus ・ Palaeoarchaeology ・ Palaeoargyra ・ Palaeoatherina ・ Palaeobalistum ・ Palaeobalistum goedeli ・ Palaeobatrachus ・ Palaeobelemnopsis ・ Palaeobenthesicymus ・ Palaeobotanical Garden in Mata ・ Palaeocarcharodon ・ Palaeocarpilius ・ Palaeocastor ・ Palaeocentrotus ・ Palaeocephala ・ Palaeochannel ・ Palaeocharinus ・ Palaeocharinus calmani ・ Palaeochenoides ・ Palaeochiropterygidae ・ Palaeochiropteryx ・ Palaeocimbex quadrimaculatus ・ Palaeococcus ・ Palaeococcus ferrophilus ・ Palaeococcus helgesonii Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Palaeocarcharodon ： ウィキペディア英語版 Palaeocarcharodon ''Palaeocarcharodon'' is a genus of sharks in the family Cretoxyrhinidae. ''Palaeocarcharodon orientalis'' is the only species of this genus. These sharks lived in the Paleocene, from 61.7 to 55.8 Ma. ==Description== Since the fossil record of ''Palaeocarcharodon'' only relies on teeth in many sizes, much is unknown about the size and appearance of these sharks. 〔(Prehistoric Wildlife ) 〕 Teeth of ''Palaeocarcharodon'' are triangular, labio-lingually compressed, with quite irregular serrations and serrate lateral cusplets. They can reach a size of about .〔 G. R. Case. - Palaeocarcharodon Orientalis (SINZOW) (Neoselachii: Cretoxyrhinidae), from the Paleocene of Maryland - Lab. de Paléontologie des Vertébrés, 1989〕 These sharks are possibly the ancestors of the Great White Shark (''Carcharodon carcharias'') and Megalodon (''Carcharodon megalodon''), as both these species have tooth serrations very similar to the serrations of ''Palaeocarcharodon''. On the contrary ''Palaeocarcharodon'' has two cusps at the base of the main tooth, while the teeth of Great White Shark and Megalodon lack said small points. 〔 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「Palaeocarcharodon」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.