Telmatherium fossil map
Where fossils of Telmatherium have been found, shown on the Earth as it looked about 45 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 45 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 | 51.1–37 million years ago (Ypresian to Priabonian) |
| Periods | Paleogene |
| Family | Brontotheriidae |
| Named by | Marsh 1872 |
| Fossil records | 32 occurrences at 9 locations (PBDB) |
| Found in | United States |
| Rock formations | Bridger, Aycross, Washakie, Baca, Hart Mine, Wagon Bed ("Tepee Trail") |
About Telmatherium
Telmatherium is a genus of a North American brontothere. It lived during the Eocene epoch.
Text in “About” is quoted from the Wikipedia article Telmatherium (revision 1364410533), 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: Q7697732.