Trigonias fossil map
Where fossils of Trigonias have been found, shown on the Earth as it looked about 30 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 30 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 | 41.03–27.3 million years ago (Bartonian to Rupelian) |
| Periods | Paleogene |
| Family | Rhinocerotidae |
| Named by | Lucas 1900 |
| Fossil records | 62 occurrences at 15 locations (PBDB) |
| Found in | United States, Canada, Mexico |
| Rock formations | Chadron, White River, Renova, txn:43187, Pruett, Cypress Hills |
About Trigonias
Trigonias (Greek: "triangular" (trigonos), "ias" [denotes possession]) is an extinct genus of rhinocerotid from the late Eocene (Chadronian) some 35 million years ago of North America.
Text in “About” is quoted from the Wikipedia article Trigonias (revision 1340985637), 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: Q135718.
