Hesperornis Hesperornis crassipes (Marsh 1876)
/hˈɛspɚɹˌɔːɹniz/
estimated
Late Cretaceous (Maastrichtian) · 100.5–66 Mya
Key Statistics
Diet
piscivore
Locomotion
bipedal
inferred from clade
Overview
Hesperornis crassipes is a theropod dinosaur known from the Late Cretaceous, roughly 100.5–66.0 million years ago. It was a piscivore. It was named by (Marsh 1876). 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%
fragmentary record
Confirmed
Inferred
Based on 1 recorded occurrences in the Paleobiology Database.
Geologic Time
Where Hesperornis crassipes sits in deep time
Hesperornis
252 Mya201 Mya145 Mya66 Mya
Relationships
Part of a wider fossil web
These species share Hesperornis crassipes's place in deep time — computed from overlapping age ranges, shared clades, and inferred ecology.