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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 Mixotoxodon ： ウィキペディア英語版 Mixotoxodon ''Mixotoxodon'' ("mixture ''Toxodon''") is an extinct genus of notoungulate of the family Toxodontidae which inhabited South America, Central America and parts of southern North America during the Pleistocene, living from 1.8—0.30 Ma and existing for approximately .〔(Paleobiology Database: ''Mixotoxodon'', Basic info. )〕 ==Description== ''Mixotoxodon'' is known by fragmentary remains, usually mandible fragments and teeth. Although the general appearance probably was very similar to the another toxodontid from the Pleistocene, the better known ''Toxodon'', their fossils shown that the outer borders of the symphysis in the lower jaw don't diverge anteriorly, and the incisors form a semicircular structure that protrude less than the incisors of ''Toxodon''; the snout was cylindrical, instead of the broad hippo-like muzzle of ''Toxodon''. The straight snout and the narrow lower incisors closely packed, suggest that this animal had a different feeding strategy compared to their southern relative, although the teeth of both genera was adapted to deal with abrasive food.〔Paula-Couto, 1979, p. 404.〕 It was a rhino-sized animal, with a weight of up to 3.8 tonnes, which make it the largest member of Notoungulata.〔Elissamburu, 2012, p. 108.〕 ''Mixotoxodon'' is known from a single species ''M. larensis''. ''Mixotoxodon'' is the only notoungulate known to have migrated out of South America during the Great American Interchange. Its fossils have been found in northern South America, in Central America,〔McKenna & Bell, 1997, p. 461; Cisneros, 2005, p. 246.〕 in Veracruz and Michoacán, Mexico (with a possible find in Tamaulipas),〔Arroyo-Cabrales ''et al.'', 2010, pp. 193-194〕 and eastern Texas, USA.〔Lundelius et al., p. 229.〕 The genus was also one of the last surviving notoungulates, along with related genera such as the better-known ''Toxodon''. The name refers to the fact that ''Mixotoxodon'' combines characteristics typical of different toxodontid subfamilies.〔van Frank, 1957, p. 6.〕 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「Mixotoxodon」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.