Cranioceras fossil map
Where fossils of Cranioceras 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 | 23.04–4.7 million years ago (Aquitanian to Zanclean) |
| Periods | Neogene |
| Family | Dromomerycidae |
| Named by | Matthew 1918 |
| Fossil records | 88 occurrences at 20 locations (PBDB) |
| Found in | United States |
| Rock formations | Ash Hollow, Valentine, txn:42629, Goliad, Tesuque, Olcott |
About Cranioceras
Cranioceras is an extinct genus of artiodactyl from the Miocene to the Pliocene in the United States.
Text in “About” is quoted from the Wikipedia article Cranioceras (revision 1258215405), 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: Q5182133.