Chasmosaurinae

Chasmosaurines Temporal range: Late Cretaceous, 78–66 Ma PreЄ Є O S D C P T J K Pg N
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

• 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]
    • Spiclypeus - (Montana, USA)
    • Utahceratops - (Utah, USA)
    • Vagaceratops - (Alberta, Canada)
    • Tribe Triceratopsini
      • Agathaumas - (Wyoming, USA)
      • Eotriceratops - (Alberta, Canada)
      • Ojoceratops - (New Mexico, USA)^[3]
      • Polyonax - (Colorado, USA)
      • Regaliceratops - (Alberta, Canada)
      • 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)

Below is the phylogeny of Brown et al.^[4]

See also

• Timeline of ceratopsian research

References

External links

• 1.http://paleodb.org/cgi-bin/bridge.pl

Wikispecies has information related to: Chasmosaurinae

Marginocephalia (Pachycephalosauria and Ceratopsia)
Kingdom: Animalia Phylum: Chordata Clade: Dinosauria Order: Ornithischia
Pachycephalosauria Basal Pachycephalosaurs Wannanosaurus Pachycephalosauridae Stegoceras-line Stegoceras Hanssuesia Gravitholus Colepiocephale Texacephale Pachycephalosaurus-line Homalocephale Prenocephale Goyocephale Sphaerotholus Tylocephale Acrotholus Amtocephale Pachycephalosaurini Pachycephalosaurus Dracorex Stygimoloch Alaskacephale
Ceratopsia Basal Ceratopsians Stenopelix Micropachycephalosaurus Albalophosaurus Chaoyangsauridae Chaoyangsaurus Xuanhuaceratops Hualianceratops Yinlong Psittacosauridae Psittacosaurus Neoceratopsia Mosaiceratops Microceratus Aquilops Liaoceratops Koreaceratops Auroraceratops Archaeoceratopsidae Archaeoceratops Yamaceratops Helioceratops Coronosauria Graciliceratops Leptoceratopsidae Leptoceratops Montanoceratops Prenoceratops Udanoceratops Zhuchengceratops Gryphoceratops Unescoceratops Cerasinops Asiaceratops Bainoceratops Bagaceratopidae Ajkaceratops Gobiceratops Bagaceratops Platyceratops Breviceratops Protoceratopsidae Protoceratops Lamaceratops Magnirostris Ceratopsoidea Zuniceratops Turanoceratops Ceratopsidae see below
Ceratopsidae Ceratopsinae Ceratops Centrosaurinae Albertaceratops Diabloceratops Machairoceratops Monoclonius Nasutoceratopsini − Avaceratops Nasutoceratops Centrosaurini − Centrosaurus Coronosaurus Rubeosaurus Spinops Styracosaurus Pachyrhinosaurini Achelousaurus Einiosaurus Pachyrhinosaurus Sinoceratops Xenoceratops Wendiceratops Chasmosaurinae Agujaceratops Anchiceratops Arrhinoceratops Bravoceratops Chasmosaurus Coahuilaceratops Judiceratops Kosmoceratops Medusaceratops Mercuriceratops Mojoceratops Pentaceratops Spiclypeus Utahceratops Vagaceratops Triceratopsini Eotriceratops Ojoceratops Polyonax Regaliceratops Tatankaceratops Titanoceratops Torosaurus Triceratops
Related categories: Ornithischians Ceratopsians Pachycephalosaurs