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Clade
Subclade

Taxon
Taxon
Chaoyangsauridae
Nominal Author
Zhao et al. 1999
2nd Nominal Author
Taxon Status INACTIVE
Comments
Potential Synonomy
Chaoyoungosauroidea (Zhao 1983), Chaoyangosauridae (Zhao et al. 1999 mispelling in reference to Chaoyoungosauroidea Zhao 1983)

Active Phylogenetic Definition
Active Definition
Shorthand
Definitional Author
Definition Status Unknown
Definition Type Unknown
Node-Stem Triplet Unknown
Other Triplet Taxa
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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 et al. (1999) erected this monotypic taxon for Chaoyangsaurus youngi. It is thus redundant with the genus and species. Zhao (1983:301) had earlier erected a superfamily on the basis of this specimen (Chaoyoungosauroidea), using an invalid (undescribed type) generic name “Chaoyoungosaurus.” Zhao et al. (1999) incorrectly cited this superfamily in Zhao (1983), inadvertently coining a new family Chaoyoungosauridae.
 

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