Hyracodon fossil map
Where fossils of Hyracodon 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 | 45.9–18.5 million years ago (Lutetian to Burdigalian) |
| Periods | Paleogene, Neogene |
| Family | Hyracodontidae |
| Named by | (Leidy 1856) |
| Fossil records | 222 occurrences at 37 locations (PBDB) |
| Found in | United States, Canada, Mexico |
| Rock formations | Brule, txn:43144, Chadron, White River, Chambers Tuff, Renova |
About Hyracodon
Hyracodon ('hyrax tooth') is an extinct genus of perissodactyl mammal from the White River Formation.
Text in “About” is quoted from the Wikipedia article Hyracodon (revision 1352307926), 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: Q930000.