Brontotholus

Brontotholus
Temporal range: Late Cretaceous
(late Campanian), ~
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Clade: Dinosauria
Clade: Ornithischia
Clade: Pachycephalosauria
Family: Pachycephalosauridae
Genus: Brontotholus
Woodruff et al., 2025
Species:
B. harmoni
Binomial name
Brontotholus harmoni
Woodruff et al., 2025

Brontotholus (lit.'thunder dome') is an extinct genus of pachycephalosaurid dinosaur known from the Late Cretaceous (Campanian stage) Two Medicine and Oldman formations of Montana, United States, and Alberta, Canada, respectively. The genus contains a single species, Brontotholus harmoni, known from multiple partial domes.