Orretherium fossil map
Where fossils of Orretherium have been found, shown on the Earth as it looked about 75 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 75 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 | 83.6–66 million years ago (Campanian to Maastrichtian) |
| Periods | Cretaceous |
| Family | Mesungulatidae |
| Named by | Martinelli et al. 2021 |
| Fossil records | 4 occurrences at 2 locations (PBDB) |
| Found in | Chile, Argentina |
| Rock formations | Dorotea, Chorrillo |
About Orretherium
Orretherium (meaning "Five teeth beast"; in part from the Aonikenk language) is a genus of mesungulatid mammal that lived in South America (Chile) during the Late Cretaceous period in what is now the Dorotea Formation. It is estimated to have weighed ~1.3kg.
Text in “About” is quoted from the Wikipedia article Orretherium (revision 1368886600), 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: Q106438122.
