Trogosus fossil map
Where fossils of Trogosus have been found, shown on the Earth as it looked about 45 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 45 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 | 56–37.71 million years ago (Ypresian to Bartonian) |
| Periods | Paleogene |
| Family | Esthonychidae |
| Named by | Leidy 1871 |
| Fossil records | 86 occurrences at 21 locations (PBDB) |
| Found in | United States, Japan, Canada, China |
| Rock formations | Bridger, Aycross, Huerfano, Wasatch, txn:40544, Wind River |
About Trogosus
Trogosus is an extinct genus of tillodont mammal. Fossils have been found in Wyoming, California, and British Columbia, and date from the Eocene between 54.8 and 33.7 million years ago.
Text in “About” is quoted from the Wikipedia article Trogosus (revision 1314621605), 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: Q599076.
