Brontotheriidae

Extinct family of odd-toed ungulates

Brontotheres (lit. 'thunder beasts'), also called titanotheres (lit. 'titanic beasts'), are an extinct group of perissodactyl (odd-toed ungulate) mammals belonging to the family Brontotheriidae. Brontotheres are traditionally interpreted as relatives of horses, though high-level perissodactyl relationships are not well understood. Brontotheres lived during the Eocene epoch and their fossils have mainly been found in Asia and North America, with some fossils also found in Eastern Europe.

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