Tylocephalonyx fossil map
Where fossils of Tylocephalonyx have been found, shown on the Earth as it looked about 15 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 15 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 | 23.04–5.333 million years ago (Aquitanian to Messinian) |
| Periods | Neogene |
| Family | Chalicotheriidae |
| Named by | Coombs 1979 |
| Fossil records | 44 occurrences at 9 locations (PBDB) |
| Found in | United States |
| Rock formations | Sheep Creek, Arikaree, txn:43076, Calvert, Salt Lake, Astoria |
About Tylocephalonyx
Tylocephalonyx is an extinct schizotherine chalicothere from the Miocene of North America.
Text in “About” is quoted from the Wikipedia article Tylocephalonyx (revision 1363180907), 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: Q7860237.
