Megacerops (Gk.,  “large horn face”) is an extinct genus of the extinct family Brontotheriidae (order Perissodactyla).  They lived in North America for about 4.1 million years during the late Eocene and evolved a variety of distinctive facial horns.  Despite their appearance and multiplicity of toes, they are thought to be more closely related to horses than to tapirs and rhinos.


But all the perissodactyls had and have simple stomachs, and thus had trouble adapting to the drier Miocene climates that offered diners grass, grass, and more grass.  They are hindgut fermenters; intestines do the heavy lifting.

The Ultimate Ungulate Page