Eudinoceras is an extinct genus of pantodont in the family Coryphodontidae. The first fossils were discovered in the Irdin Manha Formation by palaeontologists Henry Fairfield Osborn and Roy Chapman Andrews in 1923, and were assigned to the genus Eudinoceras, due to both thinking it was a dinoceratan closely related to Dinoceras (now known as Uintatherium). As more complete specimens were recovered, the animal was identified as a pantodont more related to the genus Coryphodon.
Eudinoceras was described from 2 premolars & jaw elements. However, more teeth and fragmentary skull material have been found throught Mongolia and China.
Description Eudinoceras mongoliensis was a large pantodont, reaching in length and weighing around . Histological study of molar enamel samples show that E. mongoliensis was comparable to a white rhinoceros in lifestyle.
Paleoecology Fossils of Eudinoceras are primarily known from the Irdin Manha and Arshanto Formations. It may have coexisted with the artiodactyls Andrewsarchus mongoliensis and Erlianhyus primitivus, the dinoceratan Gobiatherium mirificum, the oxyaenid Sarkastodon mongoliensis, the mesonychians Hapalodectes serus, Harpagolestes leei, and Mongolonyx dolichognathus, the paraceratheriids Forstercooperia totadenta and Pappaceras confluens, the lophialetid Lophialetes expeditus, the brontotheres Gnathotitan berkeyi, and the crocodilian Asiatosuchus grangeri.
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