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Clade
Subclade

Taxon
Taxon
Hadrosauriformes
Nominal Author
Sereno 1997
2nd Nominal Author
Taxon Status ACTIVE
Comments

Hadrosauriformes was coined by Sereno (1997) and defined as a node-based taxon including iguanodontids and hadrosaurids (Sereno 1998). The active definition is a first-order revision of this definition.

Sereno (1986) had used Iguanodontoidea (Hay 1902) in this capacity, considering the taxon a Hyperfamily in his ranked classification—one that included a subordinate superfamily (Hadrosauroidea). Later Sereno (1997) coined Hadrosauriformes as a replacement name for Iguanodontoidea to avoid having one taxon with a superfamilial ending (-oidea) inside another.

Norman (2002) proposed a definition for Iguanodontoidea. This taxon, so defined, constitutes a junior synonym for Hadrosauriformes, which was defined several years prior (Sereno 1998) and used on most cladograms of advanced ornithopods.

Potential Synonomy
Iguanodontoidea (sensu Norman 2002)

Active Phylogenetic Definition
Active Definition
The least inclusive clade containing Iguanodon bernissartensis Boulenger 1881 and Parasaurolophus walkeri Parks 1922.
Shorthand
< Iguanodon bernissartensis and Parasaurolophus walkeri.
Definitional Author
Sereno 1998
Definition Status checked
Definition Type NODE
Node-Stem Triplet NODE
Other Triplet Taxa
Iguanodontidae, Hadrosauroidea
Specifiers
Specifier(s) A
Iguanodon bernissartensis
Specifier(s) B
Parasaurolophus walkeri
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
Iguanodon, Parasaurolophus, their most recent common ancestor and all descendants.
Latest Record
Sereno 1998:62
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