Tritemnodon fossil map
Where fossils of Tritemnodon have been found, shown on the Earth as it looked about 56 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 56 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 | 56–45.9 million years ago (Ypresian to Lutetian) |
| Periods | Paleogene |
| Family | Hyaenodontidae |
| Named by | Matthew 1906 |
| Fossil records | 102 occurrences at 18 locations (PBDB) |
| Found in | United States |
| Rock formations | Willwood, Wasatch, Wind River, DeBeque, Bridger, Wagon Bed |
About Tritemnodon
Tritemnodon ("three cutting teeth") was an extinct genus of placental mammals from extinct order Hyaenodonta, that lived in North America during the early Eocene. Fossils of Tritemnodon agilis have been found in Utah and Wyoming (Willwood Formation of Big Horn County and the Lower Bridger Formation of Uinta County). It was the size of a wolf.
Text in “About” is quoted from the Wikipedia article Tritemnodon (revision 1291101761), 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: Q578987.
