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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 Ivanantonia ： ウィキペディア英語版 Ivanantonia ''Ivanantonia'' is the only genus in the extinct rodent family Ivanantoniidae and is represented by a single species, ''Ivanantonia efremovi'', from the early Eocene of Mongolia. ''Ivanantonia'' is poorly known, with only the lower dentition represented. The genus is unusual among early rodents in lacking all lower premolars and in showing evidence of propalinal chewing (Hartenberger et al., 1997). The relationships of ''Ivanantonia'' are unclear. It was described as a ctenodactyloid (Shevyreva, 1989). Hartenberger et al. (1997) suggested a potential relationship to the muroid ''Nonomys'' but declined to assign Ivanantoniidae to a suborder within Rodentia. ==References== *Hartenberger, J.-L., D. Dashzeveg, and T. Martin. 1997. What is ''Ivanantonia efremovi'' (Rodentia, Mammalia)? Paläontologische Zeitschrift, 71(1/2): 135-143. *Shevyreva, N.S. 2007. 1989. New rodents (Ctenodactyloidea, Rodentia, Mammalia) from the Lower Eocene of Mongolia. Paleontological Journal, 3: 60-72. 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「Ivanantonia」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.