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Neoliotomus fossil map

Where fossils of Neoliotomus have been found, shown on the Earth as it looked about 56 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 56 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 →

GroupEarly mammals
Lived60.9–56 million years ago (Selandian to Thanetian)
PeriodsPaleogene
Named byJepsen 1930
Fossil records28 occurrences at 11 locations (PBDB)
Found inUnited States
Rock formationsFort Union, txn:NF, DeBeque, Goler, Wasatch

About Neoliotomus

Neoliotomus is a genus of North American mammal from the Paleocene. It existed in the age immediately following the extinction of the last dinosaurs and was a member of the extinct order Multituberculata. It lies within the suborder Cimolodonta and the superfamily Ptilodontoidea. Other than that, its affinities are somewhat unclear.

The genus Neoliotomus ("new Liotomus") was named by Jepsen G.L. in 1930, and is also known as Eucosmodon (partly).

Text in “About” is quoted from the Wikipedia article Neoliotomus (revision 1368551522), 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: Q12901183.

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