†unranked clade Heterodontosauriformes Xu et al. 2006 (ornithischian)
Full reference: X. Xu, C. A. Forster, J. M. Clark and J. Mo. 2006. A basal ceratopsian with transitional features from the Late Jurassic of northwestern China. Proceedings of the Royal Society of London B 273:2135-2140
Parent taxon: Ornithischia according to X. Xu et al. 2006
Sister taxa: Armatosauria, Delatorrichnus, Enoplosauria, Eocursor, Fabrosauridae, Ferganocephale, Genasauria, Gregaripus, Heterodontosauridae, Komlosaurus, Krzyzanowskisaurus, Lesothosauria, Lesothosaurus, Metatetrapous, Neornithischia, Orthopoda, Pisanosaurus, Tacuarembovum, Thyreophora, Xiaosaurus, Gongbusaurus wucaiwanensis
Subtaxa: none
Ecology: ground dwelling herbivore