Hypsilophodon_foxii

Stegoceras_validum

Yinlong_downsi

Xuanhuaceratops_niei

Chaoyangsaurus_youngi

Psittacosaurus_sinensis

Psittacosaurus_mongoliensis

Liaoceratops_yanzigouensis

Aquilops_americanus

Yamaceratops_dorngobiensis

Auroraceratops_rugosus

Archaeoceratops_oshmai

Koreaceratops_hwaseongensis

Graciliceratops_mongoliensis

Protoceratops_andrewsi

Bagaceratops_rozhdestvenskyi

Ajkaceratops_kozmai

Zuniceratops_christopheri

Turanoceratops_tardabilis

Diabloceratops_eatoni

Centrosaurus_apertus

Triceratops_horridus

Chasmosaurus_belli

Asiaceratops_salsopaludalis

Cerasinops_hodgskissi

Montanoceratops_cerorhynchos

Ischioceratops_zhuchengensis

Prenoceratops_pieganensis

Zhuchengceratops_inexpectus

Unescoceratops_koppelhusae

Udanoceratops_tschizhovi

Leptoceratops_gracilis

Gryphoceratops_morrisoni

Ferrisaurus_sustutensis