Metarhinus is a genus of brontothere endemic to North America

North America

North America is a continent wholly within the Northern Hemisphere and almost wholly within the Western Hemisphere. It is also considered a northern subcontinent of the Americas...

 during the Eocene

Eocene

The Eocene Epoch, lasting from about 56 to 34 million years ago , is a major division of the geologic timescale and the second epoch of the Paleogene Period in the Cenozoic Era. The Eocene spans the time from the end of the Palaeocene Epoch to the beginning of the Oligocene Epoch. The start of the...

 living from 46.2—42 mya, existing for approximately .

Taxonomy

Metarhinus was named by Osborn (1908). It is not extant. Its type is Metarhinus fluviatilis. It was assigned to Brontotheriidae by Osborn (1908) and Carroll (1988); and to Dolichorhininae by Mader (1998).

Morphology

A single specimen was examined by M. Mendoza for body mass and was estimated to have a weight of 210.6 kg (464.3 lb).