Psittacosaurus

Psittacosaurus Temporal range: Early Cretaceous, 123.2–100 Ma PreЄ Є O S D C P T J K Pg N
P. meileyingensis cast, Children's Museum of Indianapolis
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Clade:	Dinosauria
Order:	†Ornithischia
Family:	†Psittacosauridae Osborn, 1923
Genus:	†Psittacosaurus Osborn, 1923
Type species
Psittacosaurus mongoliensis Osborn, 1923
Species
List of species P. mongoliensis 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 Leshchinskiy et al., 2000 P. lujiatunensis Zhou et al., 2006 P. gobiensis Sereno, Zhao and Lin, 2010
Synonyms
Protiguanodon Osborn, 1923 Hongshanosaurus You, Xu, & Wang, 2003

Protiguanodon Osborn, 1923
Hongshanosaurus You, Xu, & Wang, 2003

Psittacosaurus (/ˌsɪtəkəˈsɔːrəs/ SIT-ə-kə-SOR-əs; "parrot lizard") is a genus of extinct ceratopsian dinosaur from the Early Cretaceous of what is now Asia, existing between 123.2 and 100 million years ago. It is notable for being the most species-rich dinosaur genus. Up to 11 species are known, from across Mongolia, Siberia, China, and possibly Thailand. The species of Psittacosaurus were obligate bipeds at adulthood, with a high skull and a robust beak. One individual was found preserved with long filaments on the tail, similar to those of Tianyulong, and scales across the rest of the animal. Psittacosaurus probably had complex behaviours, based on the proportions and relative size of the brain. It may have been active for short periods of time during the day and night, and had well-developed senses of smell and vision.