Synthetoceras fossil map
Where fossils of Synthetoceras 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 | 12.5–4.7 million years ago (Serravallian to Zanclean) |
| Periods | Neogene |
| Family | Protoceratidae |
| Named by | Stirton 1932 |
| Fossil records | 26 occurrences at 9 locations (PBDB) |
| Found in | United States |
| Rock formations | txn:42572, Goliad, Valentine, Clarendon Beds, Alachua, Citronelle |
About Synthetoceras
Synthetoceras is an extinct genus of large protoceratid that was endemic to North America during the Late Miocene (12.5-4.7 million years ago), existing for approximately 7.8 million years. Fossils have been recovered from Nebraska and Texas. Two species have been described: S. tricornatus (the type species) and S. davisorum.
Text in “About” is quoted from the Wikipedia article Synthetoceras (revision 1372081199), 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: Q1931446.
