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Hesperornis
Unknown diet
There is no write-up for this dinosaur yet, but the scientific data below is complete.
Who lived alongside it
Dinosaurs found in the same rock formation as Hesperornis (Pierre Shale, Niobrara), so they lived in the same region at roughly the same time.
Claosaurus
Cretaceous
Carnivore
Brodavis
Cretaceous
Ichthyornis
Cretaceous
Baptornis
Cretaceous
Parahesperornis
Cretaceous
Niobrarasaurus
Cretaceous
Apatornis
Cretaceous
Fumicollis
Cretaceous
Formation data from the Paleobiology Database, counting only each genus's main formations. One formation can span hundreds of thousands to millions of years, so this doesn't mean any two of them ever met.
Scientific details
- Classification
- Theropod (two-legged predators)
- Family
- Hesperornithidae
- When it lived
- 66–89.8 million years ago
- Geologic stages
- Coniacian – Maastrichtian
- Named by
- Marsh, 1872
- Fossil occurrences
- 65 sites
Countries with fossils
- Canada
- Russia
- Sweden
- United States
Data from Paleobiology Database and Wikidata