Hilarcotherium fossil map
Where fossils of Hilarcotherium 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 | 20.45–11 million years ago (Burdigalian to Tortonian) |
| Periods | Neogene |
| Family | Astrapotheriidae |
| Named by | Vallejo-Pareja et al. 2015 |
| Fossil records | 14 occurrences at 6 locations (PBDB) |
| Found in | Colombia |
| Rock formations | Castilletes, La Victoria, txn:43459 |
About Hilarcotherium
Hilarcotherium is an extinct genus of astrapotheriid mammals that lived in South America during the Middle Miocene (Laventan). The type species is H. castanedaii, found in sediments of the La Victoria Formation, part of the Honda Group in the department of Tolima in Colombia. In 2018, Carrillo et al. described a partial skull and mandible of a second species H. miyou from the Castilletes Formation in the Cocinetas Basin of northern Colombia, and estimated the body weight of the animal at 6,456 kilograms (14,233 lb).
Text in “About” is quoted from the Wikipedia article Hilarcotherium (revision 1378514129), 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: Q19356902.
