9.8" Titanothere (Megacerops) Upper Jaw - South Dakota
Restoration is pretty minimal on this jaw. Just some minor touchups to the roots of the teeth and crack fill in the jaw.
Titanothere's are an extinct, massive, mammal that lived during the Eocene. While the very closely resembled a Rhinoceros, they were more closely related to todays horses. They first appeared 54 million years ago and when extinct at the end of the Eocene, 34 million years ago. The same genus has been described several times under different names Brontotherium, Titanotherium, Brontops, etc though Megacerops was the first and therefore technically correct one.