Dinocerata (from the Greek δεινός (deinós), "terrible", and κέρας (kéras), "horn") is an extinct order of plant-eating hoofed mammals with horns and protuberant canine teeth.

Temporal range: Late Paleocene–Late Eocene
Uintatherium DB.jpg
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Clade: Mesaxonia
Order: Dinocerata
Marsh, 1872
Families & genera

See text

Eobasileus (left) and Uintatherium (right).


A 2015 phylogenetic study recovered Dinocerata as closely related to Carodnia, making them part of the Euungulata assemblage.[1] A 2021 study indicated that they are most closely related to Meridiungulata (South American ungulates) and Tethytheria (elephants and sirenians).[citation needed]

Taxonomy and phylogenyEdit

Most experts[who?] place the known genera of Dinocerata within one family, Uintatheriidae, and split it into two subfamilies, Uintatheriinae and Gobiatheriinae. Some experts prefer to split Uintatheriidae into three families, with Gobiatherium placed in the monogeneric family Gobiatheriidae, the other Eocene genera in Uintatheriidae proper, and the Paleocene genera Prodinoceras and Probathyopsis placed in the family "Prodinoceratidae".


  1. ^ Burger, Benjamin J. (2015). "The systematic position of the saber-toothed and horned giants of the Eocene: the Uintatheres (Order Dinocerata)" (PDF). Utah State University Uintah Basin Campus, Vernal, UT, 84078, United States Of America.CS1 maint: location (link)