• Ceratopsia
  • Psittacosaurus mazongshanensis
  • Psittacosaurus meileyingensis
  • Psittacosaurus mongoliensis*
  • Psittacosaurus neimongoliensis
  • Psittacosaurus ordosensis
  • Psittacosaurus sattayaraki
  • Psittacosaurus sinensis
  • Psittacosaurus xinjiangensis
  • Neoceratopsia
    • Archaeoceratops oshimai
    • Graciliceratops [i. s.]
    • Leptoceratops gracilis [i. s.]
    • Udanoceratops tschizhovi [i. s.]
    • ---
      • Asiaceratops salsopaludalis
      • Microceratops gobiensis
      • Coronosauria
        • Bagaceratops rozhdestvenskyi
        • Breviceratops kozlowskii
        • Protoceratops andrewsi
        • Ceratopsoidea
          • Montanoceratops cerorhynchus
          • Ceratopsomorpha
            • Zuniceratops christopheri
            • ---
              • Turanoceratops tardabilis
              • Ceratopsidae

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Revised: January 25, 1999; New: January 1, 1996