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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 Eothoracosaurus ： ウィキペディア英語版 Eothoracosaurus ''Eothoracosaurus'' is an extinct genus of gavialoid crocodilian. It was one of the earliest and most basal gavialoids known. Fossils are present from the Ripley Formation in Mississippi, and date back to the early Maastrichtian stage of the Late Cretaceous. Some fragmentary material from the Coon Creek Formation of western Tennessee dating back to the late Campanian (slightly older than the specimens from Mississippi) has been referred to ''Eothoracosaurus'' as well. The Coon Creek Formation seems to have been deposited in a marine setting, with oceanic fauna such as the sharks ''Otodus'' and ''Squalicorax'', the sea turtle ''Toxochelys'', and mosasaurs including ''Plioplatecarpus'' and ''Globidens'' present from these strata. This suggests that ''Eothoracosaurus'' may also have led a marine lifestyle. Certain aspects of the cranial morphology of known specimens, such as a long anterior frontal process and widely spaced supratemporal fenestrae, distinguish it from the closely related ''Thoracosaurus neocesariensis'' from the late Maastrichtian and early Paleocene of New Jersey. ==References== 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「Eothoracosaurus」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.