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Part of the lower jaw of ± 7,5 x 3,2 cms.

* Leptauchenia: It is an extinct genus of goats, terrestrial herbivores belonging to the oreodont merycoidodontoidea family, and gender Leptaucheniini. It was endemic to North America during the Late Oligocene (33.9 to 16,300,000 years) and lived about 17.6 million years.




Upper Oligocene Brule Formation

Pennington County, South Dakota, USA