[pictured] Life-size model of a "semi-aquatic adapted oreodont" (Promerychoerus), on display in the Trailside Museum of Natural History in Fort Robinson State Park, Nebraska. Oredonts were herbivores, and developed into approximately fifty different species.

From The American Heritage Dictionary: "Any of various extinct sheep-sized ruminant artiodactyls of the family Merycoidodontidae, widespread during the Eocene through the Miocene epochs in North America."

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