Bisonalveus fossil map
Where fossils of Bisonalveus 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 | 60.9–57.5 million years ago (Selandian to Thanetian) |
| Periods | Paleogene |
| Family | Pentacodontidae |
| Named by | Gazin 1956 |
| Fossil records | 28 occurrences at 13 locations (PBDB) |
| Found in | Canada, United States |
| Rock formations | Paskapoo, Fort Union, txn:246758, Slope, Sentinel Butte |
About Bisonalveus
Bisonalveus ("animal from Bison Basin") is an extinct genus of placental mammals from family Pentacodontidae, that lived during the middle to late Paleocene. Bisonalveus fossils have been discovered in the upper Great Plains region of North America, including sites in modern-day Wyoming, North Dakota, Montana, and Alberta.
Text in “About” is quoted from the Wikipedia article Bisonalveus (revision 1368550091), 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: Q18604642.
