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†unranked clade Ornithischia Seeley 1888 (ornithischian)

Reptilia - Dinosauromorpha

PaleoDB taxon number: 91973

Alternative spelling: Ornithosuchia

Invalid subtaxa: Alocodon Thulborn 1975 [nomen dubium] (no. 64499), Fabrosaurus Ginsburg 1964 [nomen dubium] (no. 38718), Gongbusaurus Dong et al. 1983 [nomen dubium] (no. 38719), Notoceratops Tapia 1919 [nomen dubium] (no. 38779), Trimucrodon Thulborn 1975 [nomen dubium] (no. 38716), Trimurodon Thulborn 1975 [nomen dubium] (no. 110813)

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: Dinosauria according to D. Madzia et al. 2018

Sister taxa: Allophagi, Carnosauriformes, Cridotrisauropus, Dictyoolithidae, Diplodocia, Dystrophaeidae, Gyrotrisauropus, Harpagosauria, Harpedactylus, Herreravia, Lagunculapes, Mosaicoolithus, Nyasasaurus, Opisthocoelia, Ornithischiformes, Paleodinosauria, Phytodinosauria, Phytophagi, Polemarchus, Polyclonoolithidae, Postpubici, Praepubici, Prismatoolithidae, Ravatosauropus, Saltosauropus, Saurischia, Sillimanius, Similifaveoloolithidae, Stalicoolithidae, Steropoides, Tarsodactylus, Tarsoplectrus, Therophagi, Therosauria, Toyamasauripus, Tretospondylia, Xiphopeza, Youngoolithidae

Subtaxa: Apulosauripus, Armatosauria, Delatorrichnus, Enoplosauria, Fabrosauridae, Ferganocephale, Genasauria, Gongbusaurus wucaiwanensis, Gregaripus, Heterodontosauridae, Heterodontosauriformes, Komlosaurus, Krzyzanowskisaurus, Laquintasaura, Lesothosauria, Ligabueichnium, Metatetrapous, Neornithischia, Orthopoda, Pisanosaurus, Tacuarembovum, Xiaosaurus

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Ecology: ground dwelling herbivore