Alternative spelling: Ornithosuchia
Invalid subtaxa: Alocodon Thulborn 1975 [nomen dubium], Amtosaurus Kurzanov and Tumanova 1978 [nomen dubium], Amtosaurus magnus Kurzanov and Tumanova 1978 [nomen dubium], Fabrosaurus Ginsburg 1964 [nomen dubium], Gongbusaurus Dong et al. 1983 [nomen dubium], Notoceratops Tapia 1919 [nomen dubium], Trimucrodon Thulborn 1975 [nomen dubium], Trimurodon Thulborn 1975 [nomen dubium]
Full reference: H. G. Seeley. 1888. On the classification of the fossil animals commonly named Dinosauria. Proceedings of the Royal Society of London 43:165-171
Parent taxon: Eudinosauria according to M. T. Carrano 2013
Sister taxa: Actiosaurus, Carnosauriformes, Cridotrisauropus, Dictyoolithidae, Dystrophaeidae, Geosauridae, Gyrotrisauropus, Harpagosauria, Harpedactylus, Herreravia, Lagunculapes, Nyasasaurus, Ornithischiformes, Ornithoscelida, Paleodinosauria, Phytodinosauria, Polemarchus, Prismatoolithidae, Rachitrema, Ravatosauropus, Saltosauropus, Saurischia, Sillimanius, Spondylosoma, Steropoides, Symphypoda, Tarsodactylus, Tarsoplectrus, Therosauria, Toyamasauripus, Tretospondylia, Xiphopeza, Youngoolithidae
Subtaxa: Armatosauria, Delatorrichnus, Enoplosauria, Eocursor, Fabrosauridae, Ferganocephale, Genasauria, Gongbusaurus wucaiwanensis, Gregaripus, Heterodontosauridae, Heterodontosauriformes, Komlosaurus, Krzyzanowskisaurus, Lesothosauria, Lesothosaurus, Metatetrapous, Neornithischia, Orthopoda, Pisanosaurus, Tacuarembovum, Thyreophora, Xiaosaurus