Photo: Wyoming Dinosaur Center, via Wikimedia Commons
- Order
- Perissodactyla
- Family
- Brontotheriidae
A brontothere — an odd-toed ungulate from a family that went extinct at the end of the Eocene.
Living species of the Order Perissodactyla include horses, tapirs, and rhinoceroses. The family Brontotheriidae went extinct at the end of the Eocene. L. popoagicum is one of two odd-toed ungulate species identified from the Fossil Butte Member.
Species text: National Park Service, Fossil Butte National Monument — Fossil Mammal Species.