TYPE SPECIES:
• C. montanus Marsh, 1888 [nomen dubium] "Montana's horned face"
  
  MISASSIGNED SPECIES:
• C. alticornis (Marsh, 1887) [nomen dubium] (originally Bison) = Triceratops alticornis
• C. belli (Lambe, 1902) (originally Monoclonius) = Chasmosaurus belli
• C. canadensis (Lambe, 1902) (originally Monoclonius) = Chasmosaurus canadensis
• C. horridus (Marsh, 1889) (originally Triceratops) = Triceratops horridus
• C. paucidens (Marsh, 1889) [nomen dubium] (originally Hadrosaurus) == L. lambei
• C. recurvicornis (Cope, 1889) [nomen dubium] (originally Monoclonius) = Monoclonius recurvicornis

Animalia
Vertebrata
Tetrapoda
Sauropsida
Archosauromorpha
Ornithodira
Dinosauria
Ornithischia
Ceratopsia
Coronosauria
Ceratopsinae

May be the same as another ceratopsine genus, perhaps Chasmosaurus.