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Hyracotherium ("Hyrax-like beast") (also known as Eohippus) was a dog-sized perissodactyl ungulate that lived in the Northern Hemisphere, with species ranging throughout Asia, Europe, and North America during the Early to Mid Eocene, about 60 to 45 million years ago. It was once considered to be the earliest known member of the horse family before being reclassified as a palaeothere, of a perissodactyl family related to both horses and brontotheres.

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16y ago

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