Pachyrostra
| Pachyrhinosaurins Temporal range: Late Cretaceous, 84.9–69 Ma |
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| Skull of a Pachyrhinosaurus canadensis | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Clade: | Dinosauria |
| Order: | †Ornithischia |
| Family: | †Ceratopsidae |
| Subfamily: | †Centrosaurinae |
| Tribe: |
†Pachyrhinosaurini Fiorillo & Tykoski, 2012 |
| Type species | |
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Pachyrhinosaurus canadensis Sternberg, 1950 |
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| Subdivisions | |
Pachyrhinosaurini was a subfamily of centrosaurine dinosaurs. The clade existed during the Late Cretaceous, about 84.9 to 66 million years ago, evolving during the earliest Campanian, and becoming extinct in the Maastrichtian.
Pachyrhinosaurini was defined in 2012 by Fiorillo & Tykoski. It was defined as all centrosaurine ceratopsids more closely related to Pachyrhinosaurus canadensis than to Centrosaurus apertus. It was defined during the description of Pachyrhinosaurus petorum, a species from Alaska
Below is a cladogram by Sampson et al. 2013, with clade names such a Pachyrhinosaurini as defined by Fiorillo and Tykoski (2012).
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