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Clade
Subclade

Taxon
Taxon
Coronosauria
Nominal Author
Sereno 1986
2nd Nominal Author
Taxon Status ACTIVE
Comments
The active definition is a first-order revision of the definition in Sereno (1998) that uses species as specifiers rather than genera.
Potential Synonomy

Active Phylogenetic Definition
Active Definition
The least inclusive clade containing Triceratops horridus Marsh 1889 and Protoceratops andrewsi Granger and Gregory 1923.
Shorthand
< Triceratops horridus and Protoceratops andrewsi.
Definitional Author
Sereno 2005
Definition Status checked
Definition Type NODE
Node-Stem Triplet NODE
Other Triplet Taxa
Protoceratopsidae, Ceratopsoidea
Specifiers
Specifier(s) A
Triceratops horridus
Specifier(s) B
Protoceratops andrewsi
Specifier(s) C
Qualifiers
+Taxon
-Taxon
Datum
Taxonomic Content
Publication Year Unknown
Unknown
Unknown
1998

Inactive Taxon Status
Rejection Criteria
Critique
 

Definitional History #1
Earliest Record
Protoceratops, Triceratops, their most recent common ancestor and all descendants.
Latest Record
Sereno 1998:62
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Protoceratops, Triceratops
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