Heterodontosaurus_tucki

Hypsilophodon_foxii

Protoceratops_andrewsi

P_major

Psittacosaurus_sp

P_sibiricus

P_ordosensis

P_neimongoliensis

P_sinensis

P_lujiatunensis

P_mazongshanensis

P_xinjiangensis

P_meileyingensis

P_mongoliensis