Stylinodon fossil map
Where fossils of Stylinodon 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 | 56–39.7 million years ago (Ypresian to Bartonian) |
| Periods | Paleogene |
| Family | Stylinodontidae |
| Named by | Marsh 1874 |
| Fossil records | 44 occurrences at 8 locations (PBDB) |
| Found in | United States |
| Rock formations | Bridger, Wasatch, Huerfano, Devil's Graveyard, Washakie, Wind River |
About Stylinodon
Stylinodon ("tooth with pilar-like fibers") is an extinct genus of taeniodonts that lived in North America from early to middle Eocene.
Text in “About” is quoted from the Wikipedia article Stylinodon (revision 1354990113), 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: Q2281297.