After Sereno, 1990, 2000
<==o †Psittacosauria Osborn, 1923 `--o †Psittacosauridae Osborn, 1923 |?- †Hongshanosaurus houi You, Xu & Wang, 2003 `--o †Psittacosaurus Osborn, 1923a [Protiguanodon Osborn, 1923a] |-- †P. neimongoliensis Russell & Zhao, 1996; E.Cret. EAs. |-- †P. gobiensis Sereno, Zhao & Lin, 2009; E.Cret. EAs. |-- †P. ordosensis Russell & Zhao, 1996; E.Cret. EAs. [=? P. sinensis] |-- †P. major Sereno, Zhao, Brown & Tan, 2007; E.Cret. EAs. |?- †P. mazongshanensis Xu, 1997 |-- †P. meileyingensis Sereno, Chao, Cheng & Rao, 1988; E.Cret. EAs. |-- †P. mongoliensis Osborn, 1923; E.Cret. EAs. [taxonomic history] |-- †P. xinjiangensis Sereno & Chao, 1988; E.Cret. EAs. |-- †P. lujiatunensis Zhou, Gao, Fox & Chen, 2006; E.Cret. EAs. `--+-- †P. sinensis Young, 1958a; E.Cret. EAs. `-- †P. sibiricus Voronkevich & Averianov, 2000; E.Cret. EAs.
†Psittacosauria incertae sedis:
†Psittacosaurus sattayaraki Buffetaut & Suteenthorn, 1992 [nomia dubia]
†Psittacosaurus mazongshanensis Xu, 1997
Reference(s):
- Sereno, P. C., 1990: Psittacosauria. 579-592
in Weishampel, D. B., Dodson, P., & Osmólska, H. (eds.), 1990: The Dinosauria.
–University of California Press, Berkley, Los Angeles, Oxford, 1990 xvi-733 - Sereno, P. C., 2000: The fossil record, systematics and evolution of pachycephalosaurs and ceratopsians from Asia. 480-516
in Benton, M. J., Shishkin, M. A., Unvin, D. M. & Kurochkin, E. N., (eds.) 2000: The Age of Dinosaurs in Russia and Mongolia.
–Cambridge University Press, Cambridge, xxxix-696 - Sereno, P. C. & Chao, S., 1988: Psittacosaurus xinjiangensis (Ornithischia: Ceratopsia), a new psittacosaur from the Lower Cretaceous of Northwestern China.
–Journal of Vertebrate Paleontology: Vol. 8, #4, pp. 353-365 - Sereno, P. C., Chao, S., Cheng, Z. & Rao, C., 1988: Psittacosaurus meileyingensis (Ornithischia: Ceratopsia), a new psittacosaur from the Lower Cretaceous of Northeastern China.
–Journal of Vertebrate Paleontology: Vol. 8, #4, pp. 366-377 - Sereno, P. C., Zhao, X., Brown, L. & Tan, L., 2007: New psittacosaurid highlights skull enlargement in horned dinosaurs.
–Acta Palaeontologica Polonica: Vol. 52, #2, pp. 275-284 [http://app.pan.pl/acta52/app52-275.pdf] - Sereno, P. C., Zhao, X. & Lin, T., 2009: A new psittacosaur from Inner Mongolia and the parrot-like structure and function of the psittacosaur skull.
–Proceedings of the Royal Society of London: Biological series: Vol. 277, #1, pp. 199-209 [doi: 10.1098/rspb.2009.0691] - You, H.-l., Xu, X. & Wang, X.-l., 2003: A New Genus of Psittacosauridae (Dinosauria: Ornithopoda) and the Origin and Early Evolution of Marginocephalian Dinosaurs.
–Acta Geologica Sinica: Vol. 77, #1 - Zhou, C.-F., Gao, K.-Q., Fox, R. C. & Chen, S.-H., 2006: A new species of Psittacosaurus (Dinosauria: Ceratopsia) from the Early Cretaceous Yixian Formation, Liaoning, China.
–Palaeoworld: Vol. 15, pp. 100-114