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Toxodontidae is an extinct family of notoungulate mammals known from the Oligocene through the Pleistocene of South America, with one genus, ''Mixotoxodon'', also known from the Pleistocene of Central America and southwestern North America (Texas).〔E. Lundelius, et al. 2013. The first occurrence of a toxodont (Mammalia, Notoungulata) in the United States. ''Journal of Vertebrate Paleontology'', Vol 33, No 1, pp. 229–232 (DOI:10.1080/02724634.2012.711405 )〕 They somewhat resembled rhinoceroses, and had teeth with high crowns and open roots, suggesting that they often fed on tough pampas grass. However, isotopic analyses have led to the conclusion that the most recent forms were grazing and browsing generalists. ==Classification== In 2014, a study identifying a new species of toxodontid resolved the families phylogenetic relations. The below cladogram was found by the study: |label2=Toxodontidae |2= |2= }} }} |2= }} }} }} }} }} }} }} }} }} }} }} }} 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「Toxodontidae」の詳細全文を読む スポンサード リンク
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