Hypsilophodon_foxi
Stegoceras_validus
IVPP_V12722
Chaoyangsaurus_youngi
Psittacosaurus_sinensis
Psittacosaurus_mongoliensis
Liaoceratops_yanzhiguouensis
Yamaceratops_gobiensis
Asiaceratops_salsopaludalis
Archaeoceratops_oshimai
Montanoceratops_cerorhynchus
Prenoceratops_peiganensis
Udanoceratops_tahizhovi
Leptoceratops_gracilis
Graciliceratops_mongoliensis
Protoceratops_andrewsi
Bagaceratops_rozhdestvenskyi
Zuniceratops_christopheri
Triceratops_horridus
Centrosaurus_apertus