Hesperornis Hesperornis chowi Martin and Lim 2002
/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
Canada
Region
Manitoba
Formation
Pierre Shale
Dig sites
5
distinct collections
Overview
Hesperornis chowi 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 Manitoba, Canada. It was named by Martin and Lim 2002. The species is represented by 5 recorded occurrences in the Paleobiology Database.
Fossil Record Completeness
How much of this profile is grounded in the fossil record
~18%
confidence from occurrence count
Based on 5 recorded occurrences in the Paleobiology Database.
Geologic Time
Where Hesperornis chowi sits in deep time
Hesperornis
252 Mya201 Mya145 Mya66 Mya
Relationships
Part of a wider fossil web
These species share Hesperornis chowi'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.