Oligocene Ruminant (Leptomeryx) Jaw Section

This is a jaw section containing a beautiful sequence of 4 teeth from the Oligocene ruminant Leptomeryx evansi. They were small hornless mammals related to modern antelopes. It comes from the Brule Formation in Nebraska making it around 30-34 million years old.

This specimen as was collected, prepared and identified by the Black Hills Institute.