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|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Reptilia - Psittacosauridae
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.
|P. C. Sereno et al. 2007||Psittacosaurid 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.|