Photo: National Park Service, Fossil Butte National Monument
- Order
- Condylarthra
- Family
- Hyopsodontidae
A single FBM skeleton — possibly the most complete hyopsodontid ever discovered.
Most species in this family are known only from isolated teeth and jaw fragments. They range from the size of a small rat to a raccoon.
The FBM species possessed a strong chest, claws, and short limbs — indicators of a mammal that commonly dug or rooted for food. The teeth suggest an omnivorous diet. This species' narrow body structure led to the common name, tube-sheep.
Species text: National Park Service, Fossil Butte National Monument — Fossil Mammal Species.