Eohippus

Japanese: Eohippus
Eohippus

…In 1840, R. Owen gave this name to this fossil, discovered in the London Clay, meaning beasts (therium) resembling hyraxes. Later, American paleontologist O.C. Marsh discovered a fossil intermediate between modern horses and Hyracotherium, and used the name Eohippus , meaning the first horse, but Hyracotherium has priority under the naming rules. Hyracotherium is an archaic ungulate that shares common teeth and skeletal structure with the coelomorphs that flourished mainly in the Paleocene. …

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

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…1840年に,ロンドン粘土層から発見されたこの化石に,R.オーエンは,ハイラックスに似たけものたち(テリウム)という意味のこの名をつけた。その後,アメリカの古生物学者のO.C.マーシュは,現生のウマとヒラコテリウムの中間型の化石があることを知り,はじまりのウマという意味のエオヒップスEohippusを用いたが,命名規約上ヒラコテリウムに先取権がある。ヒラコテリウムは,古型の有蹄類で主として暁新世に繁栄した髁節(かせつ)類と歯や骨格の構造に共通性がある。…

※「Eohippus」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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