Ounalashkastylus fossil map
Where fossils of Ounalashkastylus 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 | 23.04–20.45 million years ago (Aquitanian) |
| Periods | Neogene |
| Family | Desmostylidae |
| Named by | Chiba et al. 2016 |
| Fossil records | 2 occurrences at 1 locations (PBDB) |
| Found in | United States |
| Rock formations | Unalaska |
About Ounalashkastylus
Ounalashkastylus is an extinct genus of desmostylian that lived in Alaska during the Miocene epoch. It is known from a single species, Ounalashkastylus tomidai.
Text in “About” is quoted from the Wikipedia article Ounalashkastylus (revision 1371818592), 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: Q121367652.
