Sifrhippus fossil map
Where fossils of Sifrhippus 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 | 56–48.07 million years ago (Ypresian) |
| Periods | Paleogene |
| Family | Equidae |
| Named by | Froehlich 2002 |
| Fossil records | 910 occurrences at 189 locations (PBDB) |
| Found in | United States, Belgium |
| Rock formations | Willwood, Wasatch, txn:42984, San Jose, "Wasatch", Wind River |
About Sifrhippus
Sifrhippus is an extinct genus of equid containing the species S. sandrae. Sifrhippus is the oldest known equid, living during the early Eocene. Its fossils were discovered in the Bighorn Basin of Wyoming.
Text in “About” is quoted from the Wikipedia article Sifrhippus (revision 1285769466), 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: Q291458.
