Species
Valid Extinct

Brontotholus harmoni

Woodruff et al. 2025

No Wikipedia summary available.

Temporal range
Triassic
Jurassic
Cretaceous
Paleogene
Neogene
252 201 145 66 0 Ma
PBDB occurrences
3
Group
Dinosaures
Herbivore Ground dwelling, gregarious Terrestrial
🦴
PBDB ↗
Classification
Dinosauria Unranked clade
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Ornithischia Unranked clade
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Neornithischia Unranked clade
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Pyrodontia Unranked clade
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Cerapoda Unranked clade
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Marginocephalia Unranked clade
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Pachycephalosauria Suborder
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Pachycephalosauridae Family
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Pachycephalosaurinae Subfamily
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Brontotholus Genus
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Brontotholus harmoni Species
Fossil sites 3 geolocated sites
Distribution
Top countries
🇺🇸 United States
2
🇨🇦 Canada
1
Geological formations
Two Medicine
2
Oldman
1
Temporal distribution
Campanian (83.6–72.2 Ma)
3
Bibliography
Original description
D. C. Woodruff, J. R. Horner, and M. B. Goodwin, D. C. Evans. 2025. The first pachycephalosaurid from the Late Cretaceous Two Medicine Formation: effects of the Western Interior Seaway on North American pachycephalosaurid evolution. Zoological Journal of the Linnean Society 205(2):zlaf087 DOI ↗
Bibliography (1)
D. C. Woodruff, J. R. Horner, and M. B. Goodwin, D. C. Evans. 2025. The first pachycephalosaurid from the Late Cretaceous Two Medicine Formation: effects of the Western Interior Seaway on North American pachycephalosaurid evolution. Zoological Journal of the Linnean Society 205(2):zlaf087 DOI ↗