Prosaurolophus Saurolophini Saurolophus Anatotitan ? Tanius Edmontosaurus Phylogeny of Ornithodira Edmontosaurini Shantungosaurus Hadrosaurini Gryposaurus ? Thespesius ? Aralosaurus Microhadrosaurus ? Kritosaurus Hadrosaurinae Maiasaurini Maiasaura Hadrosaurus Euhadrosauria Lambeosaurinae Pteropelyx Brachylophosaurus Parasaurolophus Telmatosaurus ? Gadolosaurus Arambourgiania Azhdarcho Gilmoreosaurus ? Arstanosaurus Diopocephalus Claosaurus ? Bactrosaurus Charonosaurus ? Bennettazhia Protohadros Unofficially named clades RANK Secernosaurus LEGEND ? Doratorhynchus Orthomerus Daughter clade Montanazhdarcho Mandschurosaurus Parasaurolophini ? Tsintaosaurus Above genus Quetzalcoatlus Hypsibema "Daughter clade" Azhdarchidae Zhejiangopterus Hadrosauridae ? Hironosaurus Tree root Daughter clade Lambeosaurini Nipponosaurus Genus and below ? Amurosaurus "Daughter clade" Tupuxuara Nanyangosaurus Jaxartosaurus Parent clade Daughter clade Ouranosaurus Lambeosaurus Daughter clade Azhdarchoidea Tapejara Hadrosauroidea Altirhinus ? Gnathosaurus Iguanodon Unnamed daughter clade Barsboldia Craspedodon Certain Daughter clade Dsungaripteridae Dsungaripterus Iguanodontoidea "Camptosaurus" sp. Corythosaurus Puntanipterus "Gnathosaurinae" Plataleorhynchus ? Lurdusaurus PLACEMENT WITHIN Less certain Daughter clade Pterodaustro Anhanguera Fukuisaurus Hypacrosaurus ? Noripterus Planicoxa Uncertain Cycnorhamphus "Phobetor" Ctenochasma Styracosterna ? Eolambia Diceratops PARENT CLADE Eosipterus Ctenochasmatidae Huanhepterus Camptosauridae Draconyx Very uncertain Kepodactylus Anhanguerinae Arthurdactylus Mesadactylus Pterodactylidae ? Haopterus "Coloborhynchus" clavirostris Bihariosaurus ? Normannognathus ? Cearadactylus Ankylopollexia Pararhabdodon Probactrosaurus Triceratops Herbstosaurus ? Germanodactylus Camptosaurus Dermodactylus Tropeognathus ? Anabisetia Wyomingopteryx Pterodactylus Criorhynchus Pterodactyloidea Nyctosaurus Anhangueridae Siroccopteryx Dryomorpha Dryosauridae Dryosaurus Torosaurus Istiodactylus Parapsicephalus ? Bogolubovia Gasparinisaura ? Kangnasaurus Pteranodon Angustinaripterus Ornithocheiroidea Pteranodontoidea Ornithostoma Euiguanodontia ? Loncosaurus Valdosaurus Arrhinoceratops ? "Mandschurosaurus" laosensis ? Muttaburrasaurus Rhamphorhynchidae Rhamphocephalus Ornithocheiridae Ornithocheirus Jinzhousaurus Anchiceratops ? Araripesaurus Lophorhothon Chasmosaurini Pentaceratops Brasileodactylus Iguanodontia Tenontosaurus ? Araripedactylus Ugrosaurus Chasmosaurus Campylognathoididae Eudimorphodon Rhamphorhynchus Santanadactylus Hypsilophodontia Hypsilophodon Ceratopsinae Polyonax Claorhynchus ? Ceratops Euornithopoda Parksosaurus Rhabdodon Agathaumas Centrosaurus Dysganus Dimorphodontidae Dimorphodon Campylognathoides Othnieliidae "Yandusaurus" multidens Drinker Ceratopsidae Centrosaurinae Avaceratops ? Nesodactylus Zephyrosauridae Orodromeus Centrosaurini Styracosaurus "Anoplosaurus" tanyspondylus Dorygnathus Peteinosaurus Notohypsilophodon Othnieliinae Othnielia Turanoceratops Pachyrhinosaurini Brachyceratops Atlascopcosaurus Gravitholus ? "Odontorhynchus" Fulgurotherium Zephyrosaurus Archaeoceratops Monoclonius Leaellynasaura ? Kulceratops Prenocephale Scaphognathus ? Sanpasaurus ? Chaoyangsaurus Ceratopsomorpha Zuniceratops Einiosaurus Qantassaurus Microceratops Tylocephale ? Stygimoloch Yandusaurus Graciliceratops ? Tichosteus Microcephale Sordes Nanosaurus Leptoceratops Ceratopsoidea Montanoceratops Achelousaurus Siluosaurus "Echizensaurus" Udanoceratops Protoceratops Pachycephalosaurinae Pachycephalosaurini Pachycephalosaurus Thescelosaurus Trachodon Magulodon Stegosaurus Phyllodon Asiaceratops Breviceratops Anurognathidae Anurognathus Ornithopoda Bugenasaura Neoceratopsia Coronosauria Bagaceratops Pachyrhinosaurus Comodactylus Marginocephalia Ceratopsia Psittacosauria Psittacosaurus Pachycephalosauridae Stegoceras Laopteryx ? Dendrorhynchoides Stenopelix Stegosaurini Wuerhosaurus Euoplocephalus Rhamphinion Notoceratops Lexovisaurus Pterosauria Preondactylus Batrachognathus Cerapoda Heterodontosauridae Lanasaurus Xuanhuasaurus ? Thecospondylus Geranosaurus Pachycephalosauria Wannanosaurus Homalocephaloidea Homalocephale ? Paranthodon Jeholosaurus Stegosaurinae Tuojiangosaurus Pinacosaurus ? Dianchungosaurus Yaverlandia Micropachycephalosaurus Amtosaurus Pterosauromorpha ? Sharovipteryx Echinodon Heterodontosaurinae Abrictosaurus Chialingosaurus Shanxia ? Avipes Taveirosaurus Goyocephalia Goyocephale Genasauria Thyreophora Scutellosaurus Huayangosauridae Huayangosaurus Chungkingosaurus Maleevus Scleromochlus Fabrosaurus Gigantspinosaurus Talarurus Ornithodira Dinosauromorpha Lagerpeton Lesothosaurus Bienosaurus Heterodontosaurini Heterodontosaurus "Katsuyamakensaurus" Syrmosaurini Saichania ? Gongbusaurus Regnosaurus Agilisaurus Thyreophoroidea Tatisaurus Kentrosaurus ? Nodocephalosaurus Pisanosaurus Emausaurus Changtusaurus Monkonosaurus Dinosauriformes Lagosuchus Pekinosaurus Lycorhinus Craterosaurus ? Ankylosaurus Tarchia Galtonia Lusitanosaurus ? Hesperosaurus Yingshanosaurus Marasuchus Lucianosaurus Camelotia Eurypoda Stegosauria Stegosauridae Dacentrurus Sauroplites Revueltosaurus Brachypodosaurus Pseudolagosuchus Technosaurus Ankylosaurinae ? Tsagantegia Gobisaurus Tecovasaurus Scelidosaurus Trimucrodon Azendohsaurus Melanorosauridae Melanorosaurus Ankylosauria Cryptosaurus Xiaosaurus Massospondylidae Massospondylus Minmi Dinosauria Ornithischia Alocodon ? Thecodontosaurus Lufengosaurus Heishansaurus Shamosaurinae ? Shamosaurus Luanpingosaurus Blikanasaurus Peishansaurus Gargoyleosaurus Mymoorapelta Sauropoda Cardiodon ? Coloradisaurus Priconodon Teyuwasu Saturnalia Lessemsaurus Ultrasaurus Yunnanosaurinae Yunnanosaurus Priodontognathus Saurischia Eshanosaurus Thotobolosaurus Asiatosaurus Tianzhenosaurus Cedarpelta "Gyposaurus" sinensis Euskelosaurus Gongxianosaurus ? Tyreophorus Polacanthinae Hylaeosaurus Sauropodomorpha ? Nyasasaurus Microdontosaurus Kunmingosaurus ? Stegosaurides Chinshakiangosaurus Tendaguriidae Tendaguria Jingshanosaurus ? Rhadinosaurus Tianchisaurus ? Acanthopholis Theropoda ? Arctosaurus Isanosaurus Ankylosauroidea Ankylosauridae Aletopelta ? Carnosaurus Yimenosaurus Polacanthini Gastonia ? Coelurosaurus Riojasaurus ? Sellosaurus ? Kotasaurus Stegopeltini Stegopelta ? Spinosuchus Mussaurus ? Velocipes Ruehleia Vulcanodon Nodosauridae ? Struthiosaurus Sinosaurus Anchisaurus ? Anoplosaurus Hoplitosaurus Protoavis Plateosauridae Plateosaurus ? Dracopelta Glyptodontopelta Eoraptor ? Nodosaurus Herrerasauria Herrerasauridae Chindesaurus Eusauropoda ? Oshanosaurus ? Palaeoscincus Herrerasaurinae Herrerasaurus Shunosaurus "Pleurocoelus" altus ? Texasetes Polacanthus Barapasaurus Euhelopus ? Sarcolestes Staurikosauridae Staurikosaurus Dachongosaurus Pawpawsaurus ? Guaibasauridae Guaibasaurus Caseosaurus ? Ohmdenosaurus Protognathosaurus ? Liaoningosaurus ? Zizhongosaurus "Morosaurus" agilis Edmontoniinae ? Niobrarasaurus Animantarx Datousaurus Tienshanosaurus Panoplosaurinae Panoplosaurus Lancanjiangosaurus Neotheropoda Magnosaurus ? Aliwalia Lapparentosaurus Edmontonia ? Alwalkeria Tehuelchesaurus Mamenchisaurus Sauropelta Limaysaurus ? Liassaurus Chuanjiesaurus ? Hudiesaurus ? Merosaurus Klamelisaurus ? Sinocoelurus Rhoetosaurus ? Nurosaurus ? Teinurosaurus Mamenchisauridae Omeisaurus Silvisaurus Rebbachisaurinae Rebbachisaurus ? Calamospondylus Amygdalodon ? Histriasaurus Altispinax ? Volkheimeria ? Cetiosaurus Capitalsaurus Rayososaurus Amargasaurus Chuangdongocoelurus Rebbachisauridae Nigersaurus Coeluroides ? Megacervixosaurus "Elaphrosaurus" gautieri ? "Rebbachisaurus" tasmenensis ? Mongolosaurus Dystylosaurus "Elaphrosaurus" iguidensis Diplodocoidea Dicraeosauridae Dicraeosaurus Embasaurus Jobaria Amphicoelias Supersaurus Inosaurus Losillasaurus Kagasaurus ? Patagosaurus Neosauropoda Diplodocimorpha ? Hisanohamasaurus Seismosaurus Katsuyamasaurus Cetiosauriscus Diplodocidae Dinheirosaurus Kelmayisaurus Syntarsus Qinlingosaurus Dystrophaeus Diplodocus Podokesaurus Agustiniidae Agustinia Dyslocosaurus "Megalosaurus" andrewsi ? Pterospondylus Eucoelophysis "Titanosaurus" rahioliensis Diplodocinae Barosaurus "Megalosaurus" chubutensis ? Shuvosaurus Coelophysis Haplocanthosaurus Apatosaurinae Eobrontosaurus "Megalosaurus" insignis Halticosaurus Coelophysidae Camposaurus Macronaria Sugiyamasaurus ? Aragosaurus "Megalosaurus" pannoniensis Gojirasaurus Chondrosteosaurus "Megalosaurus" pombali Dolichosuchus Bashunosaurus Camarasaurus "Megalosaurus" terquemi Dilophosaurus ? Abrosaurus Apatosaurus Ceratosauria Coelophysoidea Coelophysidae Procompsognathinae Procompsognathus Camarasauromorpha Camarasauridae ? Lourinhasaurus Brachiosaurus Mifunesaurus ? Ligabueino Cedarosaurus Newtonsaurus Elaphrosaurus Noasaurus Ngexisaurus Giraffatitan "Poekilopleuron" schmidti Neoceratosauria Sarcosaurus Liliensternus Ilokelesia Segisaurus Velocisaurus Titanosauriformes Brachiosauridae Sauroposeidon Prodeinodon Genusaurus Compsosuchus Noasauridae Masiakasaurus ? Austrosaurus Quilmesaurus Dryptosauroides ? Bellusaurus "Sidormimus" ? Dandakosaurus Genyodectes ? Damalasaurus Sigilmassasaurus Ceratosaurus Bothriospondylus "Tsuchikurasaurus" Abelisauria Abelisauridae Abelisaurinae Abelisaurus "Ischyrosaurus" Wakinosaurus Ornithomimoides Carnotaurinae Majungasaurus Ornithopsis Walgettosuchus Jubbulpuria Betasuchus Aucasaurus Pelorosaurus Tetanurae "Allosaurus" sp. Abelisauroidea Laevisuchus Spinosaurus Carnotaurus Venenosaurus Becklespinax Xenotarsosaurus Indosaurus ? Astrodon Eustreptospondylus Tarascosaurus Majungatholus