†suborder Orthopoda Cope 1866 (ornithischian)
Synonym: Predentata Marsh 1894
Full reference: E. D. Cope. 1866. [On the anomalous relations existing between the tibia and fibula in certain of the Dinosauria]. Proceedings of the Academy of Natural Sciences of Philadelphia 18:316-317
Parent taxon: Ornithischia according to R. S. Lull 1915
Sister taxa: Armatosauria, Delatorrichnus, Enoplosauria, Eocursor, Fabrosauridae, Ferganocephale, Genasauria, Gregaripus, Heterodontosauridae, Heterodontosauriformes, Komlosaurus, Krzyzanowskisaurus, Lesothosauria, Lesothosaurus, Metatetrapous, Neornithischia, Pisanosaurus, Tacuarembovum, Thyreophora, Xiaosaurus, Gongbusaurus wucaiwanensis
Subtaxa: Hypsirhophidae, Orbitoscuta, Ornithopodidae, Poposauria
Ecology: ground dwelling herbivore