Merycoides fossil map
Where fossils of Merycoides have been found, shown on the Earth as it looked about 15 million years ago and on today’s map.
Dots are fossil collections recorded in the Paleobiology Database. The “then” view moves today’s fossil sites back to their positions 15 million years ago (the time slice nearest the median age of the fossils) using the Merdith et al. (2021) plate model; positions are approximate. Open on the timeline map →
| Group | Early mammals |
|---|---|
| Lived | 31.8–16.3 million years ago (Rupelian to Burdigalian) |
| Periods | Paleogene, Neogene |
| Family | Merycoidodontidae |
| Named by | Douglass 1907 |
| Fossil records | 46 occurrences at 14 locations (PBDB) |
| Found in | United States |
| Rock formations | txn:42488, John Day, Marsland, Gering, Rosebud, Renova |
About Merycoides
Merycoides is an extinct genus of oreodont of the subfamily Merycoidodontinae endemic to North America. It lived during the Oligocene to Late Miocene, 30.8—16.0 mya, existing for approximately 15 million years. Fossils have been uncovered throughout the western U.S. as well as Florida.
Text in “About” is quoted from the Wikipedia article Merycoides (revision 1345022643), licensed under CC BY-SA 4.0; introduction excerpted verbatim, formatting removed. Ages, family, authority and fossil records: Paleobiology Database, accessed 23 October 2026. Ages are those of the rock layers the fossils were found in. Wikidata: Q6820972.
