Synonym: Gilmoreosaurus atavus Nessov 1995 [nomen dubium]
Full reference: P. C. Sereno. 1986. Phylogeny of the bird-hipped dinosaurs (order Ornithischia). National Geographic Research 2(2):234-256
Parent taxon: Ornithopoda according to M. T. Carrano 2013
Sister taxa: Anabisetia, Anomoepodidae, Bonaparteichnium, Brachypoda, Camptosaurichnus, Caririchnium, Dakotasaurus, Dinehichnus, Dinosauropodes, Dolichopoda, Fabrosauria, Gasparinisaura, Gideonmantellia, Hypsiloichnus, Hypsilophodon, Hypsilophodontia, Iguanodontia, Jeholosauridae, Jiayinosauropus, Kalodontoidea, Koreanosaurus, Laoyingshanpus, Leaellynasaura, Moyenisauropodidae, Nanosauridae, Ornithopodichnites, Ovaloolithidae, Qantassaurus, Staurichnium, Talenkauen, Tetrapodosauridae, Thescelosauridae, Trachodontoidea, Trinisaura, Unespichnium, Wintonopus, Yueosaurus
Subtaxa: Drinker, Heterodontosauria, Hypsilophodontidae, Nanosaurus, Notohypsilophodon, Yandusaurus
Ecology: ground dwelling herbivore