Synonym: Hypsilophodontia Cooper 1985
Full reference: D. B. Norman. 2014. Iguanodonts from the Wealden of England: do they contribute to the discussion concerning hadrosaur origins?. Hadrosaurs 10-43
Parent taxon: Ornithopoda according to P.-E. Dieudonné et al. 2020
See also Alifanov and Saveliev 2014, Cooper 1985, Herne et al. 2019, Madzia et al. 2018, Norman 1989, Norman 2014, Russell 1984 and Sereno 1986
Sister taxa: Anomoepodidae, Bonaparteichnium, Brachypoda, Burianosaurus, Camptosaurichnus, Camptosauropus, Changchunsaurus, Changmiania, Dakotasaurus, Dinosauropodes, Dolichopoda, Euornithopoda, Fabrosauria, Gideonmantellia, Gilmoreosaurus arkhangelskyi, Goseongosauripus, Hypsiloichnus, Iguanodontipodidae, Iguanodontipodidae, Jiayinosauropus, Kalodontoidea, Laosaurus, Laosaurus celer, Laosaurus minimus, Moyenisauropodidae, Nanosaurus, Ningxiapus, Ornithopoidea, Othnielia, Phyllodon, Psilotrisauropus, Qantassaurus, Siluosaurus, Taponichnus, Telosichnus, Tetrapodosauridae, Trachodontoidea, Unespichnium, Walmadanyichnus, Weewarrasaurus, Wintonopus
Subtaxa: Hypsilophodontidae Hypsilophodontoidea Iguanodontia Proyandusaurus Thescelosaurus
Ecology: ground dwelling herbivore