Chasmosaurinae
| Chasmosaurines Temporal range: Late Cretaceous, 76.5–66Ma | |
|---|---|
 | |
| Chasmosaurus belli skeleton, Royal Tyrrell Museum of Palaeontology | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Dinosauria |
| Order: | †Ornithischia |
| Family: | †Ceratopsidae |
| Subfamily: | †Chasmosaurinae Lambe, 1915 |
| Type species | |
| †Chasmosaurus belli Lambe, 1902 | |
| Subgroups | |
|
See text. | |
Chasmosaurinae is a subfamily of ceratopsid dinosaurs. Triceratops is a well-known example. They were one of the most successful groups of herbivores of their time. Chasmosaurines appeared in the early Campanian, and became extinct, along with all other non-avian dinosaurs, during the Cretaceous–Paleogene extinction event. Broadly, the most distinguishing features of chasmosaurinae are prominent brow horns and long frills lacking long spines; centrosaurines generally had short brow horns and relatively shorter frills, and often had long spines projecting from their frills. Chasmosaurines are currently known definitively from rocks in western Canada, the western United States, and northern Mexico.
Genera
Phylogenetic relationships between Chasmosaurinae by Samson et al. (2010)
- Family Ceratopsidae
- Subfamily Chasmosaurinae
- Agujaceratops - (Texas, USA)
- Anchiceratops - (Alberta, Canada)
- Arrhinoceratops - (Alberta, Canada)
- Bravoceratops - (Texas, USA)
- Chasmosaurus - (Alberta, Canada)
- Coahuilaceratops - (Coahuila, Mexico)
- ? Dysganus - (Montana, USA)
- Judiceratops - (Montana, USA)
- Kosmoceratops - (Utah, USA)
- Medusaceratops - (Montana, USA)
- Mercuriceratops - (Montana, USA & Alberta, Canada)[1]
- Mojoceratops - (Alberta & Saskatchewan, Canada)
- Pentaceratops - (New Mexico, USA)[2]
- Utahceratops - (Utah, USA)
- Vagaceratops - (Alberta, Canada)
- Tribe Triceratopsini
- Agathaumas - (Wyoming, USA)
- Eotriceratops - (Alberta, Canada)
- Ojoceratops - (New Mexico, USA)[3]
- Polyonax - (Colorado, USA)
- Tatankaceratops - (South Dakota, USA)
- Titanoceratops - (New Mexico, USA)
- Torosaurus - (Wyoming, Montana, South Dakota, North Dakota, & Utah, USA & Saskatchewan, Canada)
- Triceratops - (Montana & Wyoming, USA & Saskatchewan & Alberta, Canada)
- Subfamily Chasmosaurinae
References
- ↑ Ryan, M. J.; Evans, D. C.; Currie, P. J.; Loewen, M. A. (2014). "A new chasmosaurine from northern Laramidia expands frill disparity in ceratopsid dinosaurs". Naturwissenschaften. doi:10.1007/s00114-014-1183-1.
- ↑ Spencer G. Lucas, Robert M. Sullivan and Adrain P. Hunt (2006). Re-evaluation of Pentaceratops and Chasmosaurus (Ornithischia: Ceratopsidae) in the Upper Cretaceous of the Western Interior. p. 4.
- ↑ Michael J. Ryan,Brenda J. Chinnery-Allgeier (n.d.). New Perspectives on Horned Dinosaurs: The Royal Tyrrell Museum Ceratopsian Symposium. Royall Tyrell Museum. p. 500.
External links
 |
Wikispecies has information related to: Chasmosaurinae |