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Clade
Subclade

Taxon
Taxon
Heterodontosauria
Nominal Author
Cooper 1985
2nd Nominal Author
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
Heterodontosauria was coined by Cooper (1985) to include Pisanosauridae and Heterodonotsauridae. As some have considered  Pisanosaurus a heteroddontosaurid (e.g., Butler 2005), the taxon may redundant with Heterodontosauridae. Sereno (1986) adopted Heterodonotsauria, attempting to create etymologically parallel clades within Ornithopoda (Hetrodontosauria, Hypsilophodontia, and Iguanodontia). This has not been widely adopted and is unnecessarily redundant for taxa that have limited diversity, such as heterodontoaurids.
 

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