Chasmosaurinae

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Chasmosaurines
Temporal range: Late Cretaceous, 76.5–66Ma
Chasmosaurus bellis RTM 01.jpg
Chasmosaurus belli skeleton, Royal Tyrrell Museum of Palaeontology
Scientific classification e
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[edit]

Phylogenetic relationships between Chasmosaurinae by Samson et al. (2010)


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References[edit]

  1. ^ 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.  edit
  2. ^ 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. 
  3. ^ Michael J. Ryan,Brenda J. Chinnery-Allgeier (?). New Perspectives on Horned Dinosaurs: The Royal Tyrrell Museum Ceratopsian Symposium. Royall Tyrell Museum. p. 500. 

External links[edit]