Psittacosaurus

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Psittacosaurus
Fossil range: Early Cretaceous

Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Sauropsida
Superorder: Dinosauria
Order: Ornithischia
Suborder: Marginocephalia
Infraorder: Ceratopsia
Family: Psittacosauridae
Genus: Psittacosaurus
Osborn, 1923
Species
  • P. mongoliensis (type)
     Osborn, 1923
  • P. sinensis
     Young, 1958
  • P. meileyingensis
     Sereno et al., 1988
  • P. xinjiangensis
     Sereno & Zhao, 1988
  • ?P. sattayaraki
     Buffetaut & Suteethorn, 1992
  • P. neimongoliensis
     Russell & Zhao, 1996
  • P. ordosensis
     Russell & Zhao, 1996
  • P. mazongshanensis
     Xu, 1997
  • ?P. sibiricus
     Voronkevich, 1998
  • P. lujiatunensis
     Zhou et al., 2006
Synonyms
Protiguanodon  Osborn, 1923

Psittacosaurus was a small ceratopsian dinosaur from the Early Cretaceous. Unlike other ceratopsians it had no horns or no frill. What made it a ceratopsian was its beak.