TABLE: Classification of the Horned Dinosaurs (Dodson, 1996)

Class Reptilia
subclass Archosauria
superorder Dinosauria
order Ornithischia
suborder Ceratopsia
infraorder Psittacosauria
family Psittacosauridae
Psittacosaurus
infraorder Neoceratopsia
family Protoceratopsidae
Leptoceratops
Protoceratops
Montanoceratops
Microceratops
Bagaceratops
Breviceratops
Udanoceratops
family Ceratopsidae
subfamily Centrosaurinae
Monoclonius
Centrosaurus
Styracosaurus
Brachyceratops
Pachyrhinosaurus
Avaceratops
Einiosaurus
Achelousaurus
subfamily Chasmosaurinae
Triceratops
Torosaurus
Diceratops
Chasmosaurus
Anchiceratops
Pentaceratops
Arrhinoceratops