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This is a very nice fossil skull of a small Oreodonta from the Brule Formation in the White River Badlands of South Dakota.  This was a goat-like species of terrestrial herbivore belonging to the Oreodont family.  This very detailed fossil with many intact teeth is from the Oligocene period and is about 30 million years old.  The highly detailed skull together with the light colored limestone matrix is 4 5/8″ long x almost 3″ wide x 3 5/8″ tall and weighs nearly 1 3/4 pounds.  An awesome fossil to display in your collection!

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SKU: GAL404 Category: Tag:


The Oreodonta is an extinct suborder of mammal in Order Artiodactyla, and therefore distantly related to pigs, hogs, camels, hippopotamuses, and the pig-like peccaries.  Over 50 species of Oreodonta have been described. They first appeared some 50 million years ago during the warm Eocene and were widely prevalent during the Oligocene in the grasslands, prairies or savannas of what is now the North American badlands.  Today, fossil jaws and teeth of the Oreodonta are commonly found in the White River badlands in South Dakota, Nebraska, and Wyoming.  Oreodonts are Artiodactyls, even toed ungulates, sometimes called a cross between a pig and a sheep. Note that they have both large canine front teeth, but also molars for chewing plants.  They were herding animals and grazers, eating mostly grasses.  They averaged three to four feet long.

Additional information

Weight3.00 lbs
Dimensions4.625 × 3.625 × 3 in

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