Hemipsalodon fossil map
Where fossils of Hemipsalodon 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 | 48.07–33.9 million years ago (Lutetian to Priabonian) |
| Periods | Paleogene |
| Family | Hyainailouridae |
| Named by | Cope 1885 |
| Fossil records | 16 occurrences at 6 locations (PBDB) |
| Found in | United States, Canada |
| Rock formations | Chambers Tuff, txn:347511, Clarno, Galisteo, Cypress Hills, White River |
About Hemipsalodon
Hemipsalodon ("half-scissor tooth") is an extinct genus of hyainailourid hyaenodonts from the subfamily Hyainailourinae that lived in North America during the middle to late Eocene. H. grandis was the largest hyaenodont found in North America, weighing 430–760 kilograms (950–1,680 lb).
Text in “About” is quoted from the Wikipedia article Hemipsalodon (revision 1332490327), 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: Q107547795.
