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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 Irenosaurus ： ウィキペディア英語版 Irenosaurus ''Irenosaurus'' is a genus of choristodere, a type of amphibious reptile. It is known from a single fragmentary postcranial skeleton (PIN 3386/2), discovered in the Aptian-age Lower Cretaceous Hühteeg Formation at Hüren Dukh, central Mongolia. The type species is ''I. egloni'', which was originally described as a new species of the related choristodere ''Tchoiria'' in 1983 by Efimov. Efimov transferred the species to the new genus ''Irenosaurus'' in 1988. Evans and Hecht (1993) questioned the separation of the taxon from ''Tchoiria namsarai'' from the same locality on the grounds that the differences between the two may not have been greater than those of various species of the choristodere ''Champsosaurus''. A later review by Efimov and Storrs (2000) retained the two as separate, noting that some characteristics of ''Irenosaurus'' are more like ''Khurendukhosaurus'', also known from the same site, at the same time recognizing the difficulties of distinguishing three genera from the same locality.〔 ''Irenosaurus'' was a small choristodere, approximately long. It is known from what are interpreted as lake deposits.〔 ==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「Irenosaurus」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.