10" Fossil Running Rhino (Hyracodon) Partial Skull - South Dakota

Fossil Running Rhino (Hyracodon) Partial Skull - South Dakota #198197

This is an beautiful, 10" long partial upper skull of Hyracodon sp. ("running rhino"). It was collected from the Brule Formation in the White River Badlands of South Dakota, and would be approximately 30-34 million years old. This specimen primarily features the right side of the upper skull with natural molars that have been meticulously exposed from the rock they were found in.

The base of the rock has been cut flat just beneath the molars, allowing it to sit nicely on a flat surface.

The skull is slightly disarticulated and incomplete in spots. There is a repaired crack at the anterior end of the skull through the maxilla..

Hyracodons were hornless running rhinoceroses with large heads compared to their slight, pony-like bodies. They are an extinct line, though: we're sure you've noticed that there are no rhinos browsing the plains of North America today.