Acritohippus is an extinct genus of Miocene area equine from North America.T. S. Kelly. 1995. New Miocene horses from the Caliente Formation, Cuyama Valley Badlands, California. Contributions in Science, Natural History Museum of Los Angeles County 455:1-33 Fossils of Acritohippus have been found in Florida, New Mexico, Montana, California, and Oregon, where its fossils were first unearthed and described as a species of Merychippus back in 1928. It was a grazer that ate C4 grasses.
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