Temporal range: Late Oligocene–Early Miocene
The species of the genus are among the largest members of the family Merycoidontidae. About the size of a cow, its fossils are some of the largest found in the Badlands. It was much larger than Merycoidodon and Miniochoerus, its contemporaries in the Late Oligocene. On the other hand, Eporeodon was a rare oreodont, as its fossils only make up about one percent of all oreodont fossils found in the Badlands.
Eporeodon was named by Marsh (1875). It was synonymized subjectively with Eucrotaphus by Cope (1884). It was assigned to Merycoidodontidae by Marsh (1875), Scott (1890), Thorpe (1921), Thorpe (1937), Stevens and Stevens (1996) and Lander (1998). It's synonymized with Hypselochoerus and Pseudodesmatochoerus.
E. occidentalis (syn. E. davisi, E. leptacanthus, E. longifrons, E. perbullatus, Eucrotaphus pacificus), E. pygmyus.
- PaleoBiology Database: Eporeodon, basic info
- M. R. Thorpe. 1921. John Day Eporeodons, with descriptions of new genera and species. American Journal of Science
- M. Mendoza, C. M. Janis, and P. Palmqvist. 2006. Estimating the body mass of extinct ungulates: a study on the use of multiple regression. Journal of Zoology
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