Classification of Sereno 1997
Unr. †Ceratopsia Marsh 1890 [ceratopsian]
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Fm. †Psittacosauridae Osborn 1923
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G. †Psittacosaurus Osborn 1923
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†Psittacosaurus meileyingensis Sereno et al. 1988
†Psittacosaurus mongoliensis Osborn 1923
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Invalid names: Protiguanodon mongoliense Osborn 1923 [synonym], Psittacosaurus youngi Chao 1962 [synonym]
†Psittacosaurus neimongoliensis Russell and Zhao 1996
†Psittacosaurus ordosensis Russell and Zhao 1996
†Psittacosaurus sinensis Young 1958
†Psittacosaurus xinjiangensis Sereno and Chao 1988
Invalid names: Protiguanodon Osborn 1923 [synonym]