Hesperornis Hesperornis regalis Marsh 1872
/hˈɛspɚɹˌɔːɹniz/
estimated
Late Cretaceous (Campanian) · 89.8–72.2 Mya
Key Statistics
Diet
piscivore
Locomotion
bipedal
inferred from clade
Habitat
aquatic
Environment
marine
Where It Was Found
Countries
Canada, United States
Regions
Manitoba · Northwest Territories · Alberta · Kansas
Formations
Pierre Shale · Foremost · Carlile · Niobrara
Dig sites
20
distinct collections
Overview
Hesperornis regalis is a theropod dinosaur known from the Late Cretaceous, roughly 89.8–72.2 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 and elsewhere. It was named by Marsh 1872. The species is represented by 20 recorded occurrences in the Paleobiology Database.
Fossil Record Completeness
How much of this profile is grounded in the fossil record
~55%
well attested
Based on 20 recorded occurrences in the Paleobiology Database.
Geologic Time
Where Hesperornis regalis sits in deep time
Hesperornis
252 Mya201 Mya145 Mya66 Mya
Relationships
Part of a wider fossil web
These species share Hesperornis regalis'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.