Editing Chasmosaurus (section)

==Classification==
[[File:ChasmosaurCMNSkull.jpg|thumb|Skull of ''Chasmosaurus belli'', [[Canadian Museum of Nature]]]]
''Chasmosaurus'' was in 1915 by Lambe within the [[Ceratopsia]] assigned to the [[Chasmosaurinae]].<ref>L.M. Lambe, 1915, "On ''Eoceratops canadensis'', gen. nov., with remarks on other genera of Cretaceous horned dinosaurs", ''Canada Geological Survey Museum Bulletin'' 12, Geological Series 24: 1–49</ref> The Chasmosaurinae usually have long frills, like ''Chasmosaurus'' itself, whereas their sister-group the [[Centrosaurinae]] typically have shorter frills. Most [[cladistic]] analyses show that ''Chasmosaurus'' has a basal position in the Chasmosaurinae.S
[[File:Chasmosaurus russelli skull.jpg|thumb|Skull of ''Chasmosaurus russelli'', [[Royal Tyrrell Museum of Palaeontology|Royal Tyrell Museum of Palaeontology]].]]
[[File:Chasmosaurine specimens from the Dinosaur Park Formation.PNG|thumb|[[Stratigraphic]] positions of [[chasmosaurine]] specimens from the [[Dinosaur Park Formation]]]]  
The following [[cladogram]] shows the [[phylogeny]] of ''Chasmosaurus'' according to a study by [[Scott Sampson]] e.a. in 2010.<ref name="Sampson"/>
{{clade| style=font-size:85%;line-height:85%
|label1='''[[Ceratopsidae]]'''
|1={{clade
   |1=[[Centrosaurinae]] 
   |label2=[[Chasmosaurinae]]
   |2={{clade
      |1='''''Chasmosaurus'''''
      |2={{clade
         |1=''[[Mojoceratops]]''
         |2={{clade
            |1=''[[Agujaceratops]]''
            |2={{clade
               |1={{clade
                  |1=''[[Utahceratops]]''
                  |2=''[[Pentaceratops]]''}}
               |2={{clade
                  |1=''[[Coahuilaceratops]]''
                  |2={{clade
                     |1={{clade
                        |1=''[[Kosmoceratops]]''
                        |2=''[[Vagaceratops]]''}}
                     |2={{clade
                        |1=''[[Anchiceratops]]''
                        |2={{clade
                           |1=''[[Arrhinoceratops]]''
                           |2={{clade
                              |1=''[[Ojoceratops]]''
                              |2=''[[Eotriceratops]]''
                              |3={{clade
                                 |1=''[[Torosaurus]]''
                                 |2={{clade
                                    |1=''[[Nedoceratops]]''
                                    |2=''[[Triceratops]]''
}} }} }} }} }} }} }} }} }} }} }} }} }}