Ornithischia (/ˌɔːrnəˈθɪski.ə/) is an extinct clade of mainly herbivorous dinosaurs characterized by a pelvic structure superficially similar to that of...

divisions of dinosaurs (the other being Ornithischia), classified by their hip structure. Saurischia and Ornithischia were originally called orders by Harry...

(1979). "The dome-headed dinosaur Tylosteus ornatus Leidy 1872 (Reptilia: Ornithischia: Pachycephalosauridae)". Notulae Naturae. 456: 1–11. Leidy, Joseph (1872)...

Formation of Montana; with a phylogenetic analysis of the Centrosaurinae (Ornithischia: Ceratopsidae)". Journal of Vertebrate Paleontology. 15 (4): 743–760...

the diversity and abundance of small-bodied ornithopods (Dinosauria, Ornithischia) from the Belly River Group (Campanian) of Alberta". Journal of Vertebrate...

genera. The Pachycephalosauria was first named as a suborder of the order Ornithischia by Maryańska & Osmólska (1974). They included within it only one family...

Charrière, A.; Pereda-Suberbiola, X. (2024). "A new stegosaurian dinosaur (Ornithischia: Thyreophora) with a remarkable dermal armour from the Middle Jurassic...

1888 Harry Seeley divided dinosaurs into the two orders Saurischia and Ornithischia, based on their hip structure. These divisions have proved remarkably...

(2013). "Opinion 2320 (Case 3536): Stegosaurus Marsh, 1877 (Dinosauria, Ornithischia): type species replaced with Stegosaurus stenops Marsh, 1887". Bulletin...

phylogenetic relationships and evolutionary history of the armoured dinosaurs (Ornithischia: Thyreophora)". Journal of Systematic Palaeontology. 21 (1). 2205433...

Ankylosauria is a group of herbivorous dinosaurs of the clade Ornithischia. It includes the great majority of dinosaurs with armor in the form of bony...

Neornithischia ("new ornithischians") is a clade of the dinosaur order Ornithischia. It is the sister group of the Thyreophora within the clade Genasauria...

research Tumanova, T.A.; Alifanov, V.R. (2018). "First Record of Stegosaur (Ornithischia, Dinosauria) from the Aptian-Albian of Mongolia". Paleontological Journal...

increased by a reduction or absence of ossified tendons, that with many Ornithischia stiffen the hip region. Huayangosaurus still possessed them. In species...

considered the group distinct enough to warrant its own suborder within Ornithischia. The name is derived from the Greek κέρας/kéras meaning 'horn' and ὄψῐς/ópsis...

but denied that they were homologous to the ossified tendons of other Ornithischia and claimed that they resembled the pathological tendon aponeurosis of...

Ornithopoda is usually given the rank of Suborder, within the order Ornithischia. While ranked taxonomy has largely fallen out of favour among dinosaur...

Hans-Dieter (2011-02-08). "New data on pachycephalosaurid dinosaurs (Reptilia: Ornithischia) from North America". Canadian Journal of Earth Sciences. 20 (3): 462–472...

feather-like integument is evidence for protofeathers being basal to Ornithischia and possibly Dinosauria as a whole, rather than just to Coelurosauria...

"A redescription of the skull of Euoplocephalus tutus (Archosauria: Ornithischia): a foundation for comparative and systematic studies of ankylosaurian...

; Barrett, P. M. (2012). "Phylogeny of the ankylosaurian dinosaurs (Ornithischia: Thyreophora)". Journal of Systematic Palaeontology. 10 (2): 301–312...

McDonald, A. T. (2012). "Phylogeny of basal iguanodonts (Dinosauria: Ornithischia): an update". PLOS ONE. 7 (5): e36745. doi:10.1371/journal.pone.0036745...

"Dental assessment of Stegoceras validum (Ornithischia: Pachycephalosauridae) and Thescelosaurus neglectus (Ornithischia: Thescelosauridae): paleoecological...

of Harry Govier Seeley's division of Dinosauria into Saurischia and Ornithischia. The term was revived in 2017 after a new cladistic analysis by Baron...

Manabe, M. (2023). "Furcatoceratops elucidans, a new centrosaurine (Ornithischia: Ceratopsidae) from the upper Campanian Judith River Formation, Montana...

Upchurch, P. (2008). Systematics and phylogeny of Stegosauria (Dinosauria: Ornithischia). Journal of Systematic Palaeontology, 6(4), 367-407. Czerkas, S (1999)...

Burns, Michael E. (2008). "Taxonomic utility of ankylosaur (Dinosauria, Ornithischia) osteoderms: Glyptodontopelta mimus Ford, 2000: a test case". Journal...

Saurischia and Ornithischia. Saurischia includes those taxa sharing a more recent common ancestor with birds than with Ornithischia, while Ornithischia includes...

Tereschhenko, V. S. (2008). "Adaptive Features of Protoceratopsids (Ornithischia: Neoceratopsia)". Paleontological Journal. 42 (3): 273–286. doi:10...

making room for a large gut. Such a pelvic arrangement is typical for the Ornithischia, which some other studies have allied it with, although is also found...