Dinosauria Ornithischia Cerapoda
Marginocephalia
Frilled and dome-headed dinosaurs.
- Protorosaurus
- Arrhinoceratops
- Einiosaurus
- Menefeeceratops sealeyi
- Sphaerotholus goodwini
- Psittacosaurus mongoliensis
- Platytholus clemensi
- Sinocephale
- Tylocephale
- Amtocephale
- Acrotholus
- Crittendenceratops krzyzanowskii
- Diceratus
- Eoceratops
- Mojoceratops
- Rubeosaurus ovatus
- Sterrholophus
- Diabloceratops
- Machairoceratops cronusi
- Colepiocephale lambei
- Xenoceratops foremostensis
- Wendiceratops pinhornensis
- Lokiceratops rangiformis
- Judiceratops tigris
- Albertaceratops
- Hanssuesia
- Medusaceratops lokii
- Sinoceratops zhuchengensis
- Achelousaurus horneri
- Agujaceratops mariscalensis
- Avaceratops lammersi
- Chasmosaurus
- Coronosaurus
- Foraminacephale brevis
- Mercuriceratops
- Monoclonius crassus
- Stegoceras validum
- Centrosaurus
- Spinops sternbergorum
- Utahceratops
- Spiclypeus shipporum
- Vagaceratops
- Kosmoceratops
- Pentaceratops
- Styracosaurus albertensis
- Furcatoceratops elucidans
- Nasutoceratops titusi
- Brontotholus harmoni
- Stellasaurus ancellae
- Navajoceratops sullivani
- Protoceratops andrewsi
- Terminocavus sealeyi
- Titanoceratops
- Bisticeratops froeseorum
- Anchiceratops ornatus
- Pachyrhinosaurus canadensis
- Diceratops
- Sierraceratops turneri
- Yehuecauhceratops mudei
- Coahuilaceratops magnacuerna
- Alaskacephale
- Bravoceratops
- Pachycephalosaurus wyomingensis
- Eotriceratops xerinsularis
- Regaliceratops peterhewsi
- Torosaurus latus
- Triceratops
- Nedoceratops
- Ojoceratops
- Tatankaceratops sacrisonorum