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Temporal range: Eocene
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Perissodactyla
Family: Brontotheriidae
Subfamily: Dolichorhininae
Genus: Mesatirhinus
Osborn (1908)

Mesatirhinus is a genus of brontothere endemic to North America during the Eocene living from 50.3—42 mya, existing for approximately 8.3 million years.[1]


Mesatirhinus was named by Osborn (1908). It is not extant. It was assigned to Brontotheriidae by Osborn (1908) and Carroll (1988); and to Dolichorhininae by Mader (1998).[2]


This animal's height is said to be approximately 1 m (3 feet).


  1. ^ PaleoBiology Database: Mesatirhinus, basic info
  2. ^ B. J. Mader. 1998. Brontotheriidae. In C. M. Janis, K. M. Scott, and L. L. Jacobs (eds.), Evolution of Tertiary Mammals of North America 1:525-536