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Clade
Subclade

Taxon
Taxon
Psittacosauridae
Nominal Author
Osborn 1923
2nd Nominal Author
Taxon Status ACTIVE
Comments
Psittacosauridae was coined by Osborn (1923) and was redundant with the genus Psittacosaurus until the naming of Hongshanosaurus (You et al. 2003). Now there are two genera (Psittacosaurus, Hongshanosaurus) and a continuing stream of species. The taxon is here defined for the first time as stem-based with Psittacosaurus mongoliensis as the internal specifier.
Potential Synonomy

Active Phylogenetic Definition
Active Definition
The most inclusive clade containing Psittacosaurus mongoliensis Osborn 1923 but not Triceratops horridus Marsh 1889.
Shorthand
> Psittacosaurus mongoliensis but not Triceratops horridus.
Definitional Author
Sereno 2005
Definition Status ORIGINAL
Definition Type STEM
Node-Stem Triplet NO
Other Triplet Taxa
Specifiers
Specifier(s) A
Specifier(s) B
Specifier(s) C
Qualifiers
+Taxon
-Taxon
Datum
Taxonomic Content
Publication Year Unknown
Unknown
Unknown
2005

Inactive Taxon Status
Rejection Criteria
Critique
 

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