Tetrastylus fossil map
Where fossils of Tetrastylus 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 | 11.63–0.0117 million years ago (Tortonian to Late Pleistocene) |
| Periods | Neogene, Quaternary |
| Family | Dinomyidae |
| Named by | Ameghino 1886 |
| Fossil records | 68 occurrences at 20 locations (PBDB) |
| Found in | Argentina, Brazil, Venezuela, Uruguay |
| Rock formations | Chiquimil, Cerro Azul, Ituzaingo, Solimoes, Epecuén, Urumaco |
About Tetrastylus
Tetrastylus is an extinct genus of dinomyid rodent that lived in South America during the Neogene and Quaternary periods.
Text in “About” is quoted from the Wikipedia article Tetrastylus (revision 1362134522), 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: Q114891458.
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