Simomylodon fossil map
Where fossils of Simomylodon have been found, shown on the Earth as it looked about 5 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 5 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 | 15.5–2.58 million years ago (Langhian to Piacenzian) |
| Periods | Neogene |
| Family | Mylodontidae |
| Named by | Saint-André et al. 2010 |
| Fossil records | 18 occurrences at 8 locations (PBDB) |
| Found in | Bolivia, Argentina, Peru |
| Rock formations | Umala, Tafna, txn:43629, Rosa Pata, Casira, Descanso |
About Simomylodon
Simomylodon is an extinct genus of ground sloths from the family Mylodontidae. It lived from the Late Miocene to the Middle Pliocene of what is now Bolivia and Argentina, 5.3 to 2.8 million years ago. The most important find material comes from the central Altiplano in Bolivia and includes several skulls and dentition remains. Thus, the so far documented body skeleton is the best known and most significant of a Miocene representative of the Mylodontidae. On the basis of the remains, it can be concluded that it is a rather small member of the Mylodontidae. The construction of the limbs supports ground-dwelling locomotion, but this does not exclude occasional digging or climbing. The type and only known species is Simomylodon uccasamamensis.
Text in “About” is quoted from the Wikipedia article Simomylodon (revision 1354695050), 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: Q64692248.
