Nototamias fossil map
Where fossils of Nototamias have been found, shown on the Earth as it looked about 15 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 15 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 | 31.8–12.5 million years ago (Rupelian to Serravallian) |
| Periods | Paleogene, Neogene |
| Family | Sciuridae |
| Named by | Pratt and Morgan 1989 |
| Fossil records | 58 occurrences at 18 locations (PBDB) |
| Found in | United States, Canada, Panama |
| Rock formations | Sespe, txn:41486, Vaqueros, Fleming, Harrison, Arikaree |
About Nototamias
Nototamias is a genus of fossil ground squirrels from the Miocene of North America. Species include Nototamias hulberti Pratt and Morgan, 1989; Nototamias ateles (Hall, 1930); and Nototamias complicatus Korth, 1992. Although the genus, characterized by fused roots on the lower cheekteeth, is often regarded as closely related to the chipmunks, and N. ateles has even been regarded as a species of Tamias, evidence for this relationship is poor and Nototamias may instead be near the origin of the Marmotini.
Text in “About” is quoted from the Wikipedia article Nototamias (revision 1248947078), 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: Q7063278.
