…Together with the gliding reptiles, thunder reptiles, pyrrhogasters, and heteroungulates, they form a unique South American ungulate group, but in the Pliocene, North and South America were connected by the formation of the Isthmus of Panama, and the evolved ungulates of the Old World settled in South America, and became extinct in the Pleistocene. The large fossil bones discovered by C. Darwin in Patagonia during the voyage of the Beagle were Toxodon from the Pleistocene, a giant rhinoceros-like anomaly ungulate. [Kamei Setsuo] … *Some of the terminology that mentions "Toxodon" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…滑距(かつきよ)類,雷獣類,火獣類,異蹄類とともに特異な南アメリカの有蹄類群をつくっているが,鮮新世に南北アメリカ両大陸がパナマ地峡の陸化によって接続し,旧大陸の進化した有蹄類が南アメリカ大陸に住みつくとともに更新世になって絶滅した。C.ダーウィンがビーグル号航海のときにパタゴニアで発見した大きな化石骨は更新世のトクソドンToxodonであり,巨大なサイのような南蹄類の動物であった。【亀井 節夫】。… ※「Toxodon」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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