[D] Psittacosaurus xinjiangensis [Su]
Describer
Sereno & Chao, 1988
Time
Cretaceous Early Aptian Albian
Classification
Ornithischia Genasauria Cerapoda Marginocephalia Ceratopia Neoceratopia Psittacosauridae
Diet
Herbivore
Fossilsite
Tugulu Group of the Junggar Basin, Lianmugin Formation, Xinjiang Uygur Zizhiqu, China
Fall Under
Psittacosaurus
Info
Skull
Psittacosaurus (Osborn, 1923) = Protiguanodon (Osborn, 1923)
Psittacosaurus > Psittacosaurus guyangensis (Cheng, 1983)
Psittacosaurus > Psittacosaurus mongoliensis ( Osborn, 1923) = Psittacosaurus protiguanodonensis (Young, 1958) > Protiguanodon mongoliensis ( Osborn, 1923)
Psittacosaurus > Psittacosaurus osborni (Young, 1931) > Psittacosaurus tingi (Young, 1931)
Psittacosaurus > Psittacosaurus sinensis (Young, 1958) > > Psittacosaurus youngi (Chao, 1962)
Psittacosaurus > Psittacosaurus meileyingensis (Sereno, Chao, Cheng & Rao, 1988)
Psittacosaurus > Psittacosaurus xinjiangensis (Sereno & Chao, 1988)
Psittacosaurus > Psittacosaurus neimongoliensis (Russell & Zhao, 1996)
Psittacosaurus > Psittacosaurus mazongshanensis (Dong & Azuma, 1996)
Psittacosaurus > Psittacosaurus ordosensis (Russell & Zhao, 1996)
Psittacosaurus > Psittacosaurus lujiatunensis (Zhou, Gao, Fox, and Chen, 2006)
Psittacosaurus > Psittacosaurus sibiricus (Averianov, Voronkevich, Leshchinskiy, Fayngertz, 2006)
Psittacosaurus> Psittacosaurus major - (Sereno, Zhao, Brown and Tan 2007)
Psittacosaurus> Psittacosaurus gobiensis (Sereno, Zhao & Tan 2010)
More than 10 inviduals, including articulated skeleton with skull.
A partial specimen of Psittacosaurus xinjiangensis from the Urho locality in the Western Junggar Basin, China, extends the known geographical range of Psittacosaurus xinjiangensis and documents the adult morphology in this species.
Variation in the number of denticles on the dentary tooth crowns is documented, possibly representing a decrease in the number of denticles during growth, although a high denticle count remains a diagnostic feature of the species.
Diagnosis
Jugal horn anteriorly flattened; rostral surface of lateral aspect of jugal much larger than caudal surface; maxillary crowns having denticulate margin that curves caudomedially onto side near crown; iliac postacetabular process portionately elongate; distal extension of ossified epaxial tendons onto proximal half of tail (Xu and Zhao, 1999)
Sereno & Chao, 1988
Time
Cretaceous Early Aptian Albian
Classification
Ornithischia Genasauria Cerapoda Marginocephalia Ceratopia Neoceratopia Psittacosauridae
Diet
Herbivore
Fossilsite
Tugulu Group of the Junggar Basin, Lianmugin Formation, Xinjiang Uygur Zizhiqu, China
Fall Under
Psittacosaurus
Info
Skull
Psittacosaurus (Osborn, 1923) = Protiguanodon (Osborn, 1923)
Psittacosaurus > Psittacosaurus guyangensis (Cheng, 1983)
Psittacosaurus > Psittacosaurus mongoliensis ( Osborn, 1923) = Psittacosaurus protiguanodonensis (Young, 1958) > Protiguanodon mongoliensis ( Osborn, 1923)
Psittacosaurus > Psittacosaurus osborni (Young, 1931) > Psittacosaurus tingi (Young, 1931)
Psittacosaurus > Psittacosaurus sinensis (Young, 1958) > > Psittacosaurus youngi (Chao, 1962)
Psittacosaurus > Psittacosaurus meileyingensis (Sereno, Chao, Cheng & Rao, 1988)
Psittacosaurus > Psittacosaurus xinjiangensis (Sereno & Chao, 1988)
Psittacosaurus > Psittacosaurus neimongoliensis (Russell & Zhao, 1996)
Psittacosaurus > Psittacosaurus mazongshanensis (Dong & Azuma, 1996)
Psittacosaurus > Psittacosaurus ordosensis (Russell & Zhao, 1996)
Psittacosaurus > Psittacosaurus lujiatunensis (Zhou, Gao, Fox, and Chen, 2006)
Psittacosaurus > Psittacosaurus sibiricus (Averianov, Voronkevich, Leshchinskiy, Fayngertz, 2006)
Psittacosaurus> Psittacosaurus major - (Sereno, Zhao, Brown and Tan 2007)
Psittacosaurus> Psittacosaurus gobiensis (Sereno, Zhao & Tan 2010)
More than 10 inviduals, including articulated skeleton with skull.
A partial specimen of Psittacosaurus xinjiangensis from the Urho locality in the Western Junggar Basin, China, extends the known geographical range of Psittacosaurus xinjiangensis and documents the adult morphology in this species.
Variation in the number of denticles on the dentary tooth crowns is documented, possibly representing a decrease in the number of denticles during growth, although a high denticle count remains a diagnostic feature of the species.
Diagnosis
Jugal horn anteriorly flattened; rostral surface of lateral aspect of jugal much larger than caudal surface; maxillary crowns having denticulate margin that curves caudomedially onto side near crown; iliac postacetabular process portionately elongate; distal extension of ossified epaxial tendons onto proximal half of tail (Xu and Zhao, 1999)