Myocastor fossil map
Where fossils of Myocastor have been found, shown on the Earth as it looked about 0 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 0 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 | 8 million years ago to the present (Tortonian to Holocene) |
| Periods | Neogene, Quaternary |
| Family | Echimyidae |
| Named by | Kerr 1782 |
| Fossil records | 70 occurrences at 29 locations (PBDB) |
| Found in | Argentina, Brazil, Bolivia, Uruguay, Chile |
| Rock formations | txn:42051, Ituzaingo, Nuapua, Sopas, Lujan, Dolores |
About Myocastor
Myocastor (from Ancient Greek μῦς (mûs) 'rat, mouse', and κάστωρ (kástōr) 'beaver') is a genus of rodent that contains the living nutria (or coypu), as well as several fossil species.
Text in “About” is quoted from the Wikipedia article Myocastor (revision 1356395035), 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: Q10795801.
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