Nanotyrannus Nanotyrannus lethaeus Zanno and Napoli 2025
/ˈnænoʊˌtaɪˌrænəs/
Late Cretaceous (Maastrichtian) · 72.2–66 Mya
Key Statistics
Diet
carnivore
Locomotion
bipedal
inferred from clade
Habitat
ground-dwelling
Social
solitary
Where It Was Found
Country
United States
Region
Montana
Formation
Hell Creek
Dig sites
1
distinct collections
Overview
Nanotyrannus lethaeus is a theropod dinosaur known from the Late Cretaceous, roughly 72.2–66.0 million years ago. It was a carnivore. It is recorded as ground-dwelling and solitary. Fossils have been recovered from Montana, United States. It was named by Zanno and Napoli 2025. The species is represented by 1 recorded occurrence in the Paleobiology Database.
Fossil Record Completeness
How much of this profile is grounded in the fossil record
~5%
confidence from occurrence count
Based on 1 recorded occurrence in the Paleobiology Database.
Geologic Time
Where Nanotyrannus lethaeus sits in deep time
Nanotyrannus
252 Mya201 Mya145 Mya66 Mya
Relationships
Part of a wider fossil web
These species share Nanotyrannus lethaeus's place in deep time — computed from overlapping age ranges, shared clades, and inferred ecology. Predator–prey pairs additionally have to have been dug up in the same place.