Dinocerata

Dinocerata, from Ancient Greek (), "terrible", and (), "horn", or Uintatheria, is an extinct order of large herbivorous hoofed mammals with horns and protuberant canine teeth, known from the Paleocene and Eocene of Asia and North America. With body masses ranging up to they represent some of the earliest known large mammals.

== Description == left|thumb|Skull of Prodinoceras, one of the earliest dinoceratan genera Uintatheriids are suggested to have been browsers. Over the course of their evolution, dinoceratans underwent a great increase in body size, from a weight of in the earliest species to a weight of up to in the largest species, co-inciding with the development of fully graviportal limbs with a digitigrade posture. Later members of the order are noted for their distinctive pairs of horns that develop from the maxillary and parietal bones of the skull, along with the development of elongated upper canines. The upper incisors were also lost, and the bilophodont nature of the molar teeth was enhanced.