Hesperornis Hesperornis montanus Shufeldt 1915
/hˈɛspɚɹˌɔːɹniz/
estimated
Late Cretaceous (Campanian) · 83.6–72.2 Mya
Key Statistics
Diet
piscivore
Locomotion
bipedal
inferred from clade
Habitat
aquatic
Environment
marine
Where It Was Found
Country
United States
Region
Montana
Formation
Claggett
Dig sites
1
distinct collections
Overview
Hesperornis montanus is a theropod dinosaur known from the Late Cretaceous, roughly 83.6–72.2 million years ago. It was a piscivore. It is recorded as aquatic. Its remains come from marine deposits. Fossils have been recovered from Montana, United States. It was named by Shufeldt 1915. 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 Hesperornis montanus sits in deep time
Hesperornis
252 Mya201 Mya145 Mya66 Mya
Relationships
Part of a wider fossil web
These species share Hesperornis montanus'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.