Perchoerus fossil map
Where fossils of Perchoerus 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 | 41.03–23.04 million years ago (Bartonian to Chattian) |
| Periods | Paleogene |
| Family | Tayassuidae |
| Named by | Leidy 1869 |
| Fossil records | 32 occurrences at 11 locations (PBDB) |
| Found in | United States, Mexico |
| Rock formations | Brule, Chadron, txn:42420, John Day, Sharps, Yolomécatl |
About Perchoerus
Perchoerus is an extinct genus of suine (pig-like mammal) from the Eocene and Oligocene of North America. Three species are known. While often considered one of the earliest peccaries (Tayassuidae), other studies have recovered it to be a basal suine outside of either peccaries or Suidae (Old World pigs). Perchoerus is a rare component of the White River fauna, and the largest species, P. probus, also occurs in the John Day Formation of Oregon.
Text in “About” is quoted from the Wikipedia article Perchoerus (revision 1377224538), 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: Q21235313.
