Image by Connor Ashbridge · CC BY 4.0 · View on Wikimedia Commons
Brontotholus
Herbivore
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 Brontotholus (Two Medicine), so they lived in the same region at roughly the same time.
Orodromeus
Cretaceous
Maiasaura
Cretaceous
Oohkotokia
Cretaceous
Cerasinops
Cretaceous
Einiosaurus
Cretaceous
Achelousaurus
Cretaceous
Rubeosaurus
Cretaceous
Bambiraptor
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
- Ornithischian (bird-hipped)
- Family
- Pachycephalosauridae
- When it lived
- 72.2–83.6 million years ago
- Geologic stages
- Campanian
- Named by
- Woodruff et al., 2025
- Fossil occurrences
- 4 sites
Countries with fossils
- Canada
- United States
Data from Paleobiology Database and Wikidata