Temporal range: Late Oligocene
Merycoides is an extinct genus of oreodont of the subfamily Merycoidodontinae endemic to North America during the Whitneyan stage of the Oligocene-Late Oligocene epochs (30.8—24.8 mya), existing for approximately .
Merycoides was named by Douglass (1907). Its type species is Merycoides cursor. It was synonymized subjectively with Mesoreodon by Loomis (1920). It was assigned to Merycoidodontidae by Douglass (1907), Loomis (1924), Thorpe (1937) and Lander (1998)., Thorpe 1937. It is synonymous with Paramerychyus.
Fossils have been uncovered throughout the western U.S. as well as Florida.
Merycoides cursor, M. harrisonensis, M. longiceps, M. pariogonus, M. relictus
- PaleoBiology Database: Sespia, basic info
- F. B. Loomis. 1920. American Journal of Science
- B. Lander. 1998. Oreodontoidea. In C. M. Janis, K. M. Scott, and L. L. Jacobs (eds.), Evolution of Tertiary mammals of North America 402-425
- 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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