Skip to content
Hyaenodon Horridus Skeleton, estimated at $50,000-$150,000 at Bruneau & Co.

Early carnivorous mammal skeleton from the badlands of South Dakota makes auction debut at Bruneau May 29

CRANSTON, RI — A nearly complete skeleton for a hyaenodon horridus dating from 23 million to 34 million BC makes its auction debut at Bruneau & Co. on Wednesday, May 29 as a star lot in its Ancient Objects & Curios sale. Review and bid now at LiveAuctioneers.

Weighing roughly 80lbs and measuring slightly more than 5ft from snout to tail, the hyaenodon horridus looked much like a very angry hyena from which it draws its name. The Bruneau skeleton was found on a private South Dakota ranch in the White River Badlands and dates to the Oligocene period.

With only 20 percent restoration (referring to the amount of elements that were re-created to complete the skeleton), Bruneau describes it as the “rarest of the rare.” It comes mounted on a custom base in full stride, with its trademark teeth ready for the kill. Bruneau estimates the skeleton at $50,000-$150,000.