Pachyrukhos fossil map
Where fossils of Pachyrukhos 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 | 21–11 million years ago (Aquitanian to Tortonian) |
| Periods | Neogene |
| Family | Hegetotheriidae |
| Named by | Ameghino 1885 |
| Fossil records | 44 occurrences at 22 locations (PBDB) |
| Found in | Argentina, Chile |
| Rock formations | Santa Cruz, Sarmiento, Collón Cura, Cura-Mallín, txn:43439, Río Frías |
About Pachyrukhos
Pachyrukhos is an extinct genus of hegetotheriid notoungulate from the Early to Middle Miocene (Colhuehuapian-Friasian in the SALMA classification) of Argentina and Chile. Fossils of this genus have been found in the Collón Curá, Sarmiento and Santa Cruz Formations of Argentina and the Río Frías Formation of Chile.
Text in “About” is quoted from the Wikipedia article Pachyrukhos (revision 1350090125), 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: Q912000.
