Basic info Taxonomic history Classification Relationships
Morphology Ecology and taphonomy External Literature Search Age range and collections

Psittacosaurus major

Reptilia - Psittacosauridae

Taxonomy
Psittacosaurus major was named by Sereno et al. (2007). Its type specimen is LH PV1, a partial skeleton, and it is not a trace fossil. Its type locality is Beipiao City psittacosaur site (PROXY), which is in a Barremian/Aptian fluvial-lacustrine horizon in the Yixian Formation of China.

Synonymy list
YearName and author
2007Psittacosaurus major Sereno et al. pp. 275-276 figs. 1-3
2008Psittacosaurus major You et al. p. 183
2010Psittacosaurus major Sereno p. 28
2010Psittacosaurus major Sereno et al. p. 201

Is something missing? Join the Paleobiology Database and enter the data

RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
Sarcopterygii
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda()
Reptiliomorpha
Anthracosauria
Batrachosauria()
Cotylosauria()
Amniota
Sauropsida
classReptilia
subclassEureptilia()
Romeriida
Diapsida()
RankNameAuthor
Eosuchia()
Neodiapsida
SauriaGauthier 1984
Archosauromorpha(Huene 1946)
Crocopoda
ArchosauriformesGauthier 1986
Eucrocopoda
Archosauria()
informalAvemetatarsalia
Ornithodira
Dinosauromorpha
Dinosauriformes
Dinosauria()
Ornithischia()
Neornithischia()
Clypeodonta
Cerapoda
Marginocephalia
Ceratopsia()
familyPsittacosauridae
genusPsittacosaurus
speciesmajor

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

Diagnosis
ReferenceDiagnosis
P. C. Sereno et al. 2007Psittacosaurid with a large skull relative to its postcranial skeleton (30% larger than Psittacosaurus mongoliensis and most other species); transversely narrow dorsal skull roof as a result of the narrowest proportions of the nasals and frontals among psittacosaur species; the most prominent dentary flanges of any psittacosaur species with a depth approximately one-third that of the mandibular ramus; ventrolaterally projecting jugal horn; absence (closure) of the external mandibular fenestra as in Psittacosaurus sinensis and P. neimongoliensis; seven sacral vertebrae (one dorsosacral added with rib attachment to the distal end of the preacetabular process), one more than in other psittacosaur species.