Prohegetotherium fossil map
Where fossils of Prohegetotherium 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 | 33.9–15.98 million years ago (Rupelian to Burdigalian) |
| Periods | Paleogene, Neogene |
| Family | Hegetotheriidae |
| Named by | Ameghino 1897 |
| Fossil records | 46 occurrences at 17 locations (PBDB) |
| Found in | Argentina, Bolivia, Uruguay |
| Rock formations | Sarmiento, Agua de la Piedra, Fray Bentos, txn:43439, Sala Beds, Mariño |
About Prohegetotherium
Prohegetotherium is an extinct genus of hegetotheriid notoungulates from the Late Oligocene to Early Miocene (Deseadan-Santacrucian in the SALMA classification) of the Agua de la Piedra, Mariño & Sarmiento Formations of Argentina, the Petaca and Salla Formations of Bolivia, and Fray Bentos Formation of Uruguay.
Text in “About” is quoted from the Wikipedia article Prohegetotherium (revision 1258136207), 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: Q65119800.