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Clade
Subclade

Taxon
Taxon
Psittacosauroidea
Nominal Author
Osborn 1923
2nd Nominal Author
Zhao 1983
Taxon Status INACTIVE
Comments
Potential Synonomy

Active Phylogenetic Definition
Active Definition
Shorthand
Definitional Author
Definition Status Unknown
Definition Type Unknown
Node-Stem Triplet Unknown
Other Triplet Taxa
Specifiers
Specifier(s) A
Specifier(s) B
Specifier(s) C
Qualifiers
+Taxon
-Taxon
Datum
Taxonomic Content
Publication Year Unknown
Unknown
Unknown

Inactive Taxon Status
Rejection Criteria no definition
redundant
Critique
No definition has been proposed. Zhao (1983) and Cooper (1985) independently coined this redundant taxon to include Psittacosauridae.
 

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