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Trierarchuncus Trierarchuncus prairiensis Fowler et al. 2020
/tɹˈaɪɹɑːɹtʃˌʌŋkəs/
estimated
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
6
distinct collections
Overview
Trierarchuncus prairiensis 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 Fowler et al. 2020. The species is represented by 6 recorded occurrences in the Paleobiology Database.
Fossil Record Completeness
How much of this profile is grounded in the fossil record
~21%
confidence from occurrence count
Based on 6 recorded occurrences in the Paleobiology Database.
Geologic Time
Where Trierarchuncus prairiensis sits in deep time
Trierarchuncus
252 Mya201 Mya145 Mya66 Mya
Relationships
Part of a wider fossil web
These species share Trierarchuncus prairiensis'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.