Promerycochoerus

Promerycochoerus is an extinct genus of hippopotamus-like oreodont artiodactyl that lived in Central North America during the Early Miocene, 27.3—18.5 million years ago.
Image:Promerycochoerus [superbus.jpg|thumb|left|Promerycochoerus superbus]
The 1 m long creature is thought to have been amphibious, as all species possessed an elongated, barrel-shaped body and short limbs that are typical adaptations found in semi-aquatic mammals. P. superbus had a long tapir-like face, while P. carrikeri had a short, somewhat pig-like face.