Classification of the genus Psittacosaurus

G. †Psittacosaurus Osborn 1923
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Psittacosaurus amitabha Napoli et al. 2019
Psittacosaurus gobiensis Sereno et al. 2010
Psittacosaurus lujiatunensis Zhou et al. 2006
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Invalid names: Psittacosaurus houi You et al. 2003 [synonym], Psittacosaurus major Sereno et al. 2007 [synonym]
Psittacosaurus meileyingensis Sereno et al. 1988
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Invalid names: Protiguanodon mongoliense Osborn 1923 [synonym], Psittacosaurus guyangensis Cheng 1982 [synonym], Psittacosaurus osborni Young 1932 [synonym], Psittacosaurus protiguanodonensis Young 1958 [synonym], Psittacosaurus tingi Young 1932 [synonym]
Psittacosaurus neimongoliensis Russell and Zhao 1996
Psittacosaurus sibiricus Voronkevich and Averianov 2000
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Invalid names: Psittacosaurus youngi Chao 1962 [synonym]
Psittacosaurus xinjiangensis Sereno and Chao 1988
Invalid names: Hongshanosaurus You et al. 2003 [synonym], Protiguanodon Osborn 1923 [synonym], Psittacosaurus mazongshanensis Xu 1997 [nomen dubium], Psittacosaurus ordosensis Russell and Zhao 1996 [nomen dubium]