Running Rhino Hyracodon nebracencis

Hyracodon nebracencis (Leidy)
From the Oligocene,Brule Formation,Scenic Member.
Collected from Shannon County,South Dakota,U.S.A.
A nice large section of jaw from a Running Rhino from the Brule Formation.
The jaw still has Two large tooth roots still embedded,nice specimen!
Loose from matrix and Measuring 121mm x 87mm.