Hypsilophodon_foxii
Stegoceras_validum
Psittacosaurus_mongoliensis
Chaoyangsaurus_youngi
Archaeoceratops_oshimai
Protoceratops_andrews
Bagaceratops_rozhdestvenskyi
Centrosaurus_apertus
Triceratops_horridus
Montanoceratops_cerorhynchus
Leptoceratops_gracilis