Cosoryx fossil map
Where fossils of Cosoryx 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 | 23.04–3.6 million years ago (Aquitanian to Zanclean) |
| Periods | Neogene |
| Family | Antilocapridae |
| Named by | Leidy 1869 |
| Fossil records | 112 occurrences at 20 locations (PBDB) |
| Found in | United States, Japan |
| Rock formations | txn:42720, Valentine, Ash Hollow, Tesuque, Railroad Canyon Beds, Esmeralda |
About Cosoryx
Cosoryx is an extinct genus of antilocaprid that lived in the Miocene of Nevada. Fossils of this genus have also been found in the Santa Fe Group in New Mexico.
Cosoryx has sometimes been considered synonymous with Merycodus.
Text in “About” is quoted from the Wikipedia article Cosoryx (revision 1191076960), 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: Q16930483.
