Euryzygomatomys fossil map
Where fossils of Euryzygomatomys 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 | 2.58 million years ago to the present (Gelasian to Holocene) |
| Periods | Quaternary |
| Family | Echimyidae |
| Named by | Goeldi 1901 |
| Fossil records | 4 occurrences at 2 locations (PBDB) |
| Found in | Bolivia, Brazil |
| Rock formations | Tarija, txn:42051 |
About Euryzygomatomys
Euryzygomatomys is a genus of South American rodents, commonly called guiaras, in the family Echimyidae. It contains two extant and one fossil species, found in Argentina, Brazil, and Paraguay. They are:
Brandt's guiara (E. guiara)
Fischer's guiara (E. spinosus)
†E. hoffstetteri Goeldi 1901 - Tarija Formation, Bolivia
Text in “About” is quoted from the Wikipedia article Guiara (revision 1381147561), 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: Q992946.
