Mesohippus

Japanese: Mesohippus
Mesohippus

…At this time, unlike other odd-toed ungulates, the horse family evolved slowly. However, in the following Oligocene, Mesohippus had three toes on both the front and back toes, and in the following early Miocene, the horse family's evolution accelerated, with the first great radiation of horses. In other words, various species appeared, including the large Miohippus and Anchitherium , the again small Archaeohippus , the giant Hypohippus and Megahippus , etc. …

*Some of the terminology that mentions "Mesohippus" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…この時期にはウマ科は他の奇蹄目と異なり,進化速度はおそい。しかし,次の漸新世のメソヒップスMesohippusは前・後趾とも3指となり,次の中新世の初期にかけて,ウマ科の第1回の大放散が見られるなど進化速度ははやまった。つまり,大型化したミオヒップスMiohippusとアンキテリウムAnchitherium,再び小型化したアルカエオヒップスArchaeohippus,巨大なヒポヒップスHypohippusおよびメガヒップスMegahippusなどさまざまなものが現れたことである。…

※「Mesohippus」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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