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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 Merychippus ： ウィキペディア英語版 Merychippus ''Merychippus'' is an extinct proto-horse of the family Equidae that was endemic to North America during the Miocene from 20.43—10.3 Ma living for approximately .〔(Paleobiology Database: ''Merychippus'' basic info )〕 It had three toes on each foot and is the first horse known to have grazed. Its name means "ruminant horse", but current evidence does not support ''Merychippus'' ruminating. ==Taxonomy== ''Merychippus'' was named by Leidy (1856). Numerous authors around the turn of the century put the type species in Protohippus, but this ignored priority. Its type is ''Merychippus insignis''. It was assigned to Equidae by Leidy (1856) and Carroll (1988); and to Equinae by MacFadden (1998) and Bravo-Cuevas and Ferrusquía-Villafranca (2006).〔R. L. Carroll. 1988. Vertebrate Paleontology and Evolution. W. H. Freeman and Company, New York 1-698〕〔B. J. MacFadden. 1998. Equidae. In C. M. Janis, K. M. Scott, and L. L. Jacobs (eds.), Evolution of Tertiary Mammals of North America 1:537-559〕〔V. M. Bravo-Cuevas and I. Ferrusquía-Villafranca. 2006. ''Merychippus'' (Mammalia, Perissodactyla, Equidae) from the Middle Miocene of state of Oaxaca, southeastern Mexico. Géobios 39:771-784〕 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「Merychippus」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.