Equus conversidens (Owen 1869), or the Mexican horse, was a Pleistocene species of horse, now extinct, that inhabited North America. Fossils found in Mexico, Texas, Arizona, New Mexico, Oklahoma, Kansas and Florida have been identified as Equus conversidens. In January 1963, a partial skeleton of Equus conversidens was found in the city of Canyon, Texas in a white clay bed during the excavation of a basement. The species was medium to small-sized.