Pachyrhinosaurini
| Pachyrhinosaurins Temporal range: Late Cretaceous,
| |
|---|---|
| |
| Skull of a Pachyrhinosaurus canadensis | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Dinosauria |
| Clade: | †Ornithischia |
| Clade: | †Neornithischia |
| Clade: | †Ceratopsia |
| Family: | †Ceratopsidae |
| Subfamily: | †Centrosaurinae |
| Clade: | †Eucentrosaura |
| Tribe: | †Pachyrhinosaurini Fiorillo & Tykoski, 2012 |
| Type species | |
| Pachyrhinosaurus canadensis | |
| Subdivisions[3] | |
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,[4] and becoming extinct in the Maastrichtian.[2][5]
Classification
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[2]
Below is a cladogram by Sampson et al. 2013,[3] with clade names such a Pachyrhinosaurini as defined by Fiorillo and Tykoski (2012).[2]
See also
References
- ^ Ryan, M.J.; Evans, D.C.; Shepherd, K.M.; Sues, H. (2012). "A new ceratopsid from the Foremost Formation (middle Campanian) of Alberta". Canadian Journal of Earth Sciences. 49 (10): 1251. doi:10.1139/e2012-056.
- ^ a b c d "A new Maastrichtian species of the centrosaurine ceratopsid Pachyrhinosaurus from the North Slope of Alaska". Acta Palaeontologica Polonica. 57 (3): 561. 2012. doi:10.4202/app.2011.0033.
{{cite journal}}: Unknown parameter|authors=ignored (help) - ^ a b Sampson, S.D.; Lund, E.K.; Loewen, M.A.; Farke, A.A.; Clayton, K.E. (2013). "A remarkable short-snouted horned dinosaur from the Late Cretaceous (late Campanian) of southern Laramidia". Proceedings of the Royal Society B. 1766. 280: 4. doi:10.1098/rspb.2013.1186.
- ^ Gilmore, C.W. (1930). "On dinosaurian reptiles from the Two Medicine Formation of Montana". Proceedings of the United States National Museum. 77 (16): 1–39. doi:10.5479/si.00963801.77-2839.1.
- ^ "Theropod teeth from the Prince Creek Formation (Cretaceous) of northern Alaska, with speculations on Arctic dinosaur paleoecology". Journal of Vertebrate Paleontology. 20 (4): 675–682. 2001. doi:10.1671/0272-4634(2000)020[0675:TTFTPC]2.0.CO;2.
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