Editing Dinosaur (section)

===Taxonomy===
[[File:Ornithopods jconway.jpg|thumb|Restoration of six [[Ornithopoda|ornithopod]]s; far left: ''[[Camptosaurus]]'', left: ''[[Iguanodon]]'', center background: ''[[Shantungosaurus]]'', center foreground: ''[[Dryosaurus]]'', right: ''[[Corythosaurus]]'', far right (large) ''[[Tenontosaurus]]''.]]
[[File:Ceratopsidae-BW-003.png|thumb|Restoration of four [[Ceratopsidae|ceratopsids]]: top left – ''[[Triceratops]]'', top right – ''[[Styracosaurus]]'', bottom left – ''[[Anchiceratops]]'', bottom right – ''[[Chasmosaurus]]''.]]
[[File:Macronaria scrubbed enh.jpg|thumb|Restoration of four [[macronaria]]n [[Sauropoda|sauropods]]: from left to right ''[[Camarasaurus]]'', ''[[Brachiosaurus]]'', ''[[Giraffatitan]]'', and ''[[Euhelopus]]'']]
[[File:Dromaeosaurs.png|thumb|[[paleoart|Restoration]] of six [[Dromaeosauridae|dromaeosaurid]] [[Theropoda|theropods]]: from left to right ''[[Microraptor]]'', ''[[Velociraptor]]'', ''[[Austroraptor]]'', ''[[Dromaeosaurus]]'', ''[[Utahraptor]]'', and ''[[Deinonychus]]'']]

The following is a simplified classification of dinosaur groups based on their evolutionary relationships, and those of the main dinosaur groups Theropoda, Sauropodomorpha and Ornithischia, compiled by Justin Tweet.<ref>{{Cite web|author=Justin Tweet|url=https://equatorialminnesota.blogspot.com/p/blog-page_20.html|title=Classification diagrams|website=Equatorial Minnesota|access-date=2022-09-06|archive-date=November 4, 2022|archive-url=https://web.archive.org/web/20221104195358/https://equatorialminnesota.blogspot.com/p/blog-page_20.html|url-status=live}}</ref> Further details and other hypotheses of classification may be found on individual articles.

*Dinosauria
**†[[Ornithischia]] ("bird-hipped"; diverse bipedal and quadrupedal herbivores)
***†[[Saphornithischia]] ("true" ornithischians)
****†[[Heterodontosauridae]] (small herbivores/omnivores with prominent [[canine tooth|canine-like teeth]])
*****†[[Genasauria]] ("cheeked lizards")
******†[[Thyreophora]] (armored dinosaurs; bipeds and quadrupeds)
*******†[[Eurypoda]] (heavy, quadrupedal thyreophorans)
********†[[Stegosauria]] (spikes and plates as primary armor)
*********†[[Huayangosauridae]] (small stegosaurs with flank osteoderms and tail clubs)
*********†[[Stegosauridae]] (large stegosaurs)
********†[[Ankylosauria]] ([[scute]]s as primary armor)
*********†[[Parankylosauria]] (small, southern ankylosaurs with [[macuahuitl]]-like tails)
*********†[[Nodosauridae]] (mostly spiky, club-less ankylosaurs)
*********†[[Ankylosauridae]] (characterized by flat scutes)
**********†[[Ankylosaurinae]] (club-tailed ankylosaurids)
******†[[Neornithischia]] ("new ornithischians")
*******†[[Pyrodontia]] ("fire teeth")
********†[[Thescelosauridae]] ("wondrous lizards")
*********†[[Orodrominae]] (burrowers)
*********†[[Thescelosaurinae]] (large thescelosaurids)
********†[[Cerapoda]] ("horned feet")
*********†[[Marginocephalia]] (characterized by a cranial growth)
**********†[[Pachycephalosauria]] (bipeds with domed or knobby growth on skulls)
**********†[[Ceratopsia]] (bipeds and quadrupeds; many had neck frills and horns)
***********†[[Chaoyangsauridae]] (small, frill-less basal ceratopsians)
***********†[[Neoceratopsia]] ("new ceratopsians")
************†[[Leptoceratopsidae]] (little to no frills, hornless, with robust jaws)
************†[[Protoceratopsidae]] (basal ceratopsians with small frills and stubby horns)
*************†[[Ceratopsoidea]] (large-horned ceratopsians)
**************†[[Ceratopsidae]] (large, elaborately ornamented ceratopsians)
***************†[[Chasmosaurinae]] (ceratopsids with enlarged brow horns)
***************†[[Centrosaurinae]] (ceratopsids mostly characterized by frill and nasal ornamentation)
****************†[[Nasutoceratopsini]] (centrosaurines with enlarged nasal cavities)
****************†[[Centrosaurini]] (centrosaurines with enlarged nasal horns)
****************†[[Pachyrhinosaurini]] (mostly had nasal bosses instead of horns)
*********†[[Ornithopoda]] (various sizes; bipeds and quadrupeds; evolved a method of chewing using skull flexibility and numerous teeth)
**********†[[Hypsilophodontidae]] (small European neornithischians)
**********†[[Iguanodontia]] ("iguana teeth"; advanced ornithopods)
***********†[[Rhabdodontomorpha]] (with distinctive dentition)
************†[[Tenontosauridae]] (North American rhabdodontomorphs; bipeds and quadrupeds)
************†[[Rhabdodontidae]] (European rhabdodontomorphs)
***********†[[Euiguanodontia]] ("true iguanodonts")
************†[[Elasmaria]] (mostly southern ornithopods with mineralized plates along the ribs; may be thescelosaurids)
************†[[Dryomorpha]] (''[[Dryosaurus]]'' and more advanced ornithopods)
*************†[[Dryosauridae]] (mid-sized, small headed)
**************†[[Ankylopollexia]] (early members mid-sized, stocky)
***************†[[Styracosterna]] ("spiked [[Sternum|sterna]]")
****************†[[Hadrosauriformes]] (ancestrally had a thumb spike; large quadrupedal herbivores, with teeth merged into dental batteries)
*****************†[[Hadrosauromorpha]] (hadrosaurids and their closest relatives)
******************†[[Hadrosauridae]] ("duck-billed dinosaurs"; often with crests)
*******************†[[Saurolophinae]] (hadrosaurids with solid, small, no crests)
********************†[[Brachylophosaurini]] (short-crested)
********************†[[Kritosaurini]] (enlarged, solid nasal crests)
********************†[[Saurolophini]] (small, spike-like crests)
********************†[[Edmontosaurini]] (flat-headed saurolophines)
*******************†[[Lambeosaurinae]] (hadrosaurids often with hollow crests)
********************†[[Aralosaurini]] (solid-crested)
********************†[[Tsintaosaurini]] (vertical, tube-like crests)
********************†[[Parasaurolophini]] (long, backwards-arcing crests)
********************†[[Lambeosaurini]] (usually rounded crests)
**[[Saurischia]]
***†[[Herrerasauridae]] (early bipedal carnivores)
***†[[Sauropodomorpha]] (herbivores with small heads, long necks, and long tails)
****†[[Unaysauridae]] (primitive, strictly bipedal "prosauropods")
****†[[Plateosauria]] (diverse; bipeds and quadrupeds)
*****†[[Massopoda]] ("heavy feet")
******†[[Massospondylidae]] (long-necked, primitive sauropodomorphs)
******†[[Riojasauridae]] (large, primitive sauropodomorphs)
*******†[[Sauropodiformes]] (heavy, bipeds and quadrupeds)
********†[[Sauropoda]] (very large and heavy; quadrupedal)
*********†[[Lessemsauridae]] (gigantic yet lacking several weight-saving adaptations)
*********†[[Gravisauria]] ("heavy lizards")
**********†[[Eusauropoda]] ("true sauropods")
***********†[[Turiasauria]] (often large, widespread sauropods)
***********†[[Neosauropoda]] ("new sauropods"; columnar limbs)
************†[[Diplodocoidea]] (skulls and tails elongated; teeth typically narrow and pencil-like)
*************†[[Rebbachisauridae]] (short-necked, low-browsing diplodocoids often with high backs)
*************†[[Flagellicaudata]] (whip-tailed)
**************†[[Dicraeosauridae]] (small, short-necked diplodocoids with enlarged cervical and dorsal vertebrae)
**************†[[Diplodocidae]] (extremely long-necked)
***************†[[Apatosaurinae]] (robust cervical vertebrae)
***************†[[Diplodocinae]] (long, thin necks)
************†[[Macronaria]] (boxy skulls; spoon- or pencil-shaped teeth)
*************†[[Titanosauriformes]] ("titan lizard forms")
**************†[[Brachiosauridae]] (long-necked, long-armed macronarians)
**************†[[Somphospondyli]] ("porous vertebrae")
***************†[[Euhelopodidae]] (stocky, mostly Asian)
***************†[[Diamantinasauria]] (horse-like skulls; restricted to the Southern Hemisphere; may be titanosaurs)
***************†[[Titanosauria]] (diverse; stocky, with wide hips; most common in the Late Cretaceous of southern continents)
***[[Theropoda]] (carnivorous)
****[[Neotheropoda]] ("new theropods")
*****†[[Coelophysoidea]] (early theropods; includes ''[[Coelophysis]]'' and close relatives)
*****†"Dilophosaur-grade neotheropods" (larger kink-snouted dinosaurs)
*****[[Averostra]] ("bird snouts")
******†[[Ceratosauria]] (generally elaborately horned carnivores that existed from the Jurassic to Cretaceous periods, originally included Coelophysoidea)
*******†[[Ceratosauridae]] (ceratosaurs with large teeth) 
*******†[[Abelisauroidea]] (ceratosaurs exemplified by reduced arms and hands)
********†[[Abelisauridae]] (large abelisauroids with short arms and oftentimes elaborate facial ornamentation)
********†[[Noasauridae]] (diverse, generally light theropods; may include several obscure taxa)
*********†[[Elaphrosaurinae]] (bird-like; omnivorous as juveniles but herbivorous as adults)
*********†[[Noasaurinae]] (small carnivores)
******[[Tetanurae]] (stiff-tailed dinosaurs)
*******†[[Megalosauroidea]] (early group of large carnivores)
********†[[Piatnitzkysauridae]] (small basal megalosauroids endemic to the Americas)
********†[[Megalosauridae]] (large megalosauroids with powerful arms and hands)
********†[[Spinosauridae]] (crocodile-like, semiaquatic carnivores)
*******[[Avetheropoda]] ("bird theropods")
********†[[Carnosauria]] (large meat-eating dinosaurs; megalosauroids sometimes included)
*********†[[Metriacanthosauridae]] (primitive Asian allosauroids)
*********†[[Allosauridae]] (''[[Allosaurus]]'' and its very closest relatives)
*********†[[Carcharodontosauridae]] (robust allosauroids; includes some of the largest purely terrestrial carnivores)
********[[Coelurosauria]] (feathered theropods, with a range of body sizes and niches)
*********†[[Megaraptora]]? (theropods with large hand claws; potentially tyrannosauroids or neovenatorids)
*********†"Nexus of basal coelurosaurs" (used by Tweet to denote well-known taxa with unstable positions at the base of Coelurosauria)
*********[[Tyrannoraptora]] ("tyrant thieves")
**********†[[Tyrannosauroidea]] (mostly large, primitive coelurosaurs)
***********†[[Proceratosauridae]] (tyrannosauroids with head crests)
***********†[[Tyrannosauridae]] (''[[Tyrannosaurus]]'' and close relatives)
**********[[Maniraptoriformes]] (bird-like dinosaurs)
***********†[[Ornithomimosauria]] (small-headed, mostly toothless, omnivorous or possible herbivores)
************†[[Ornithomimidae]] (very ostrich-like dinosaurs)
***********[[Maniraptora]] (dinosaurs with pennaceous feathers)
************†[[Alvarezsauroidea]] (small hunters with reduced forelimbs)
*************†[[Alvarezsauridae]] (insectivores with only one enlarged digit)
************†[[Therizinosauria]] (tall, long-necked theropods; omnivores and herbivores)
*************†[[Therizinosauroidea]] (larger therizinosaurs)
**************†[[Therizinosauridae]] (sloth-like herbivores, often with enlarged claws)
************†[[Oviraptorosauria]] (omnivorous, beaked dinosaurs)
*************†[[Caudipteridae]] (bird-like, basal oviraptorosaurs)
*************†[[Caenagnathoidea]] (cassowary-like oviraptorosaurs)
**************†[[Caenagnathidae]] (toothless oviraptorosaurs known from North America and Asia)
**************†[[Oviraptoridae]] (characterized by two bony projections at the back of the mouth; exclusive to Asia)
************[[Paraves]] (avialans and their closest relatives)
*************†[[Scansoriopterygidae]] (small tree-climbing theropods with membranous wings)
*************†[[Deinonychosauria]] (toe-clawed dinosaurs; may not form a natural group)
**************†[[Archaeopterygidae]] (small, winged theropods or primitive birds)
**************†[[Troodontidae]] (omnivores; enlarged brain cavities)
**************†[[Dromaeosauridae]] ("raptors")
***************†[[Microraptoria]] (characterized by large wings on both the arms and legs; may have been capable of powered flight)
***************†[[Eudromaeosauria]] (hunters with greatly enlarged sickle claws)
**************†[[Unenlagiidae]] (piscivores; may be dromaeosaurids)
***************†[[Halszkaraptorinae]] (duck-like; potentially semiaquatic)
***************†[[Unenlagiinae]] (long-snouted)
*************[[Avialae]] (modern birds and extinct relatives)