Arizonatherium

''An alligator lazily rests by a river, with a bird on its back picking up pests from its scales. Nothing seems like its out of the ordinary; you could see this today. However, this alligator is living in the Feoprotic period, 34.6 million years from now. By this point, the southern United States hosts a strange new menagerie of life, that can be seen on the other side of the river. These include a horse-like creatures browsing on the tops of trees and some miniature insectivorous pigs sweeping up flightless bees after unearthing their hive. Suddenly, the alligator hears an aggresive snort from behind him. Several grey animals resembling rhinos are approaching the river for a drink, and its in their way. ''

This is the Arizonatherium (Arizonacerops cinereus) is a genus of the future perissodactyl family Neobrontotheria. They are descended from Indian rhinos.

Description
The most common subspecies, the Grey Arizonatherium (Arizonacerops cinereus cinerus) stands at 2.9 meters and weighs 1,000 kg. though some indivudals in the north can grow bigger, often into the 3 or even 4 meter range. These ones are usually hybrids with the Mountain Scrub Arizonatherium (Arizonacerops cinereus appalachianensis) which ranges as far north as what was once Virginia. It went extinct because of the climate change.

Evolution
The story of Arizonatherium, and the Neobrontotheres as a whole began during the 22nd century. While much more common today, rhinoceroses were still highly endangered in their native Africa and Asia.