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Taxonomy Edit

Ornithopoda is usually given the rank of Suborder, within the order Ornithischia. While ranked taxonomy has largely fallen out of favour among dinosaur paleontologists, some researchers have continued to employ such a classification, though sources have differed on what its rank should be. Benton (2004) placed it as an infraorder within the suborder Cerapoda (originally named as an unranked clade), while others, such as Ibiricu et al. 2010, have retained it at its traditional ranking of suborder.[8]

Phylogeny Edit

The cladogram below follows a 2009 analysis by Zheng and colleagues.[9]

Cerapoda

Othnielia



Hypsilophodon



Jeholosaurus



Yandusaurus




Orodromeus



Zephyrosaurus



Marginocephalia

Pachycephalosauria



Ceratopsia



Ornithopoda

Anabisetia



Bugenasaura



Thescelosaurus



Talenkauen




Gasparinisaura



Parksosaurus



Iguanodontia

Rhabdodontidae



Tenontosaurus

T. tilletti



T. dossi





Dryosauridae



Ankylopollexia







Cladogram after Butler et al, 2011.[10]

Cerapoda
Marginocephalia

Pachycephalosauria



Ceratopsia



Ornithopoda

Orodromeus



Hypsilophodon



Zephyrosaurus



Yandusaurus


Jeholosauridae

Changchunsaurus



Jeholosaurus






Gasparinisaura



Parksosaurus






Bugenasaura



Thescelosaurus



Iguanodontia

Talenkauen




Anabisetia




Rhabdodontidae



Tenontosaurus

T. tilletti



T. dossi





Dryosauridae



Ankylopollexia











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