Brontotheriidae
| Brontotheres Temporal range: Eocene | |
|---|---|
| Megacerops skeleton at the National Museum of Natural History, Washington, DC | |
| Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Mammalia |
| Order: | Perissodactyla |
| Family: | †Brontotheriidae Marsh, 1873 |
| Genera | |
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See text | |
| Synonyms | |
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Brontotheriidae is a family of extinct mammals belonging to the order Perissodactyla, the order that includes horses, rhinoceroses, and tapirs. Superficially, they looked rather like rhinos with some developing bony nose horns, and were some of the earliest mammals to have evolved large body sizes. They lived around 56–34 million years ago, until the very close of the Eocene.
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