Oxyclaenus fossil map
Where fossils of Oxyclaenus have been found, shown on the Earth as it looked about 66 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 66 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 | 66–60.9 million years ago (Danian to Selandian) |
| Periods | Paleogene |
| Family | Arctocyonidae |
| Named by | Cope 1884 |
| Fossil records | 54 occurrences at 17 locations (PBDB) |
| Found in | United States, Canada |
| Rock formations | Nacimiento, North Horn, Denver, Ferris, Ravenscrag, Fort Union |
About Oxyclaenus
Oxyclaenus is an extinct genus genus of triisodontid from the Lower Palaeocene of North America. Originally named as a subgenus of Mioclaenus, it is now regarded as a genus of its own, with Mioclaenus being a junior synonym of the genus. The genus currently consists of two species, the type species O. cuspidatus, and O. antiquus. O. simplex was moved to Carcinodon.
Text in “About” is quoted from the Wikipedia article Oxyclaenus (revision 1379551373), 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: Q60977921.
