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Clade
Subclade

Taxon
Taxon
Hypsilophodontia
Nominal Author
Cooper 1985
2nd Nominal Author
Taxon Status INACTIVE
Comments
Potential Synonomy
Hypsilophodontidae

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
other
Critique
Cooper (1985) erected Hypsilophodontia as a redundant higher taxon that included Hypsilohpodontoidea and Hypsilohpodontidae. Sereno (1986) used Hypsilophodontia to include Thescelosaurus and a subclade of more derived species (Hypsilophodontidae). The most common usage places Thescelosaurus within Hypsilophodontidae, when they are regarded as a monophyletic taxon (e.g. Sereno 1998).
 

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