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†unranked clade Ornithischia Seeley 1888 (ornithischian)

Reptilia - Dinosauromorpha

PaleoDB taxon number: 91973

Alternative spelling: Ornithosuchia

Synonyms: Omosauria Seeley 1887 (no. 56554), Praedentata Marsh 1894 (no. 304261), Predentata Marsh 1894 (no. 52978)

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, Ancistrodon, Astrodon pusillus, Camposaurus arizonensis, Carnosauriformes, Cridotrisauropus, Dictyoolithidae, Diplodocia, Dystrophaeidae, Elephantopoides, Geosauridae, Gigantosauropus, Gyrotrisauropus, Harpagosauria, Harpedactylus, Herreravia, Huanglongpus, Lagunculapes, Megalosauridae, Mirsosauropus, Neosauropus, Nyasasaurus, Omosaurus phillipsi, Opisthocoelia, Ornithischiformes, Paleodinosauria, Phytodinosauria, Phytophagi, Polemarchus, Polyclonoolithidae, Postpubici, Praepubici, Prismatoolithidae, Ravatosauropus, Saltosauropus, Saurischia, Sauropodichnus, Sillimanius, Sinoichnites, Steropoides, Tarsodactylus, Tarsoplectrus, Teyuwasu barberenai, Therophagi, Therosauria, Toyamasauripus, Tretospondylia, Xiphopeza, Youngoolithidae, Yunnanpus

Subtaxa: Alocodon, Apulosauripus, Armatosauria, Delatorrichnus, Enoplosauria, Fabrosauridae, Fabrosaurus, Ferganocephale, Genasauria, Gongbusaurus, Gregaripus, Heterodontosauridae, Heterodontosauriformes, Komlosaurus, Krzyzanowskisaurus, Laoyingshanpus, Laquintasaura, Lesothosauria, Ligabueichnium, Metatetrapous, Neornithischia, Notoceratops, Orbitoscuta, Orthopoda, Pisanosaurus, Qijiangpus, Tacuarembovum, Trimucrodon, Xiaosaurus

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Ecology: ground dwelling herbivore