Medistylus fossil map
Where fossils of Medistylus have been found, shown on the Earth as it looked about 30 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 30 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 | 29–21 million years ago (Rupelian to Aquitanian) |
| Periods | Paleogene, Neogene |
| Family | Hegetotheriidae |
| Named by | Stirton 1952 |
| Fossil records | 6 occurrences at 2 locations (PBDB) |
| Found in | Argentina |
| Rock formations | Sarmiento |
About Medistylus
Medistylus is an extinct genus of pachyrukhine hegetotheriid. It lived in Argentina during the Late Oligocene. Medistylus is known from its upper teeth and isolated skulls, however, its lower dentition is currently unknown. Its fossilized remains were found at the Cabeza Blanca and Las Cascadas localities of the Sarmiento Formation in Chubut Province of Argentina.
Text in “About” is quoted from the Wikipedia article Medistylus (revision 1292630469), 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: Q21225526.
