Children (17 direct children, 118 direct and indirect children):
Agathaumas
Centrosaurinae
(tree size 41)
Ceratops
Coronosaurus
(tree size 1)
Chasmosaurinae
(tree size 48)
Notoceratops
Polyonax
Ugrosaurus
Dysganus
(tree size 4)
Kosmoceratops
(tree size 1)
Ceratopinae
Ceratopsinae
(tree size 4)
Mercuriceratops
Nasutoceratopsini
(tree size 2)
Pachyrhinosaurinae
Monocloniinae
Sierraceratops