18" Fossil Titanothere (Megacerops) Jaw - South Dakota

This is an 18" long mandible of the massive titanothere, Megacerops, a Rhinoceros-looking animal that lived during the Late Eocene. It was collected from the Eocene-aged Chadron Formation of South Dakota. It comes from the right side of the lower jaw and still contains two teeth preserved within the jaw.

Restoration is fairly minimal on this specimen. It was found in multiple pieces within the rock, requiring some crack repair and stabilization of fractures. Most of the fragmentation can be found at the anterior end of the jaw. The angle of the jaw has some crack repair and the mandibular condyle required crack repair and some gap fill restoration. The coronoid process also has some repaired cracks through it.

Comes with an acrylic-metal display stand.

Artist's reconstruction of a Titanothere. By Nobu Tamura (http://spinops.blogspot.com)
Artist's reconstruction of a Titanothere. By Nobu Tamura (http://spinops.blogspot.com)

Titanotheres were a massive mammal that lived during the Eocene. While they closely resembled modern rhinoceroses, they were actually more closely related to modern horses. They first appeared in the Early Eocene, about 54 million years ago, and went extinct at the end of the Eocene, 34 million years ago. Titanotheres have been described under various genera (Brontotherium, Titanotherium, BrontopsMegacerops was the first and therefore technically correct one.
Megacerops sp.
Pennington County, South Dakota
Chadron Formation
18" long, 12.7 tall
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