Promerycochoerus

Promerycochoerus ("Before Merycochoerus" or "Before Ruminating Hog"^[1]) 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.^[2]

Promerycochoerus superbus

Promerycochoerus Temporal range: Early Miocene, 27.3–18.5 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Promerycochoerus carrikeri
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Artiodactyla
Family:	†Merycoidodontidae
Genus:	†Promerycochoerus Douglass, 1901
Species
P. proprius (type) P. carrikeri P. chelydra P. magnus P. matthewi P. pinensis P. superbus P. vantasselensis

The 1 m (3 ft 4 in) 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.^[3]