Oreodontoides fossil map
Where fossils of Oreodontoides have been found, shown on the Earth as it looked about 30 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 30 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 | 41.03–18.5 million years ago (Bartonian to Burdigalian) |
| Periods | Paleogene, Neogene |
| Family | Merycoidodontidae |
| Named by | (Thorpe 1921) |
| Fossil records | 24 occurrences at 8 locations (PBDB) |
| Found in | United States, Mexico |
| Rock formations | John Day, txn:42488, Harrison, "Lower Rosebud Beds", Monroe Creek, Yolomécatl |
About Oreodontoides
Oreodontoides is an extinct genus of oreodont of the family Merycoidodontidae endemic to North America. It lived during the Late Oligocene to Early Miocene (24.8—20.4 mya), existing for approximately 5 million years. Fossils have been uncovered throughout the western U.S. including at sites in Oregon, Wyoming, and South Dakota.
Text in “About” is quoted from the Wikipedia article Oreodontoides (revision 1370184835), 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: Q7101595.
