List of dinosaur genera

Dinosaurs are a diverse group of reptiles of the clade Dinosauria. They first appeared during the Triassic period, between 243 and 233.23 million years ago, although the exact origin and timing of the evolution of dinosaursis the subject of active research. They became the dominant terrestrial vertebrates after the Triassic–Jurassic extinction event 201.3 million years ago; their dominance continued throughout the Jurassic and Cretaceousperiods. The fossil record demonstrates that birds are modern feathered dinosaurs, having evolved from earlier theropods during the Late Jurassic epoch. Birds were therefore the only dinosaur lineage to survive the Cretaceous–Paleogene extinction event approximately 66 million years ago. Dinosaurs can be divided into avian dinosaurs (birds) and non-avian dinosaurs, which are all dinosaurs other than birds. Birds are feathered theropod dinosaursand constitute the only known living dinosaurs.
[[null|link=https://en.m.wikipedia.org/wiki/File:Field\_dinos\_2.jpg%7Cthumb%7C260x260px%7CMounted skeletons of *Tyrannosaurus*(left) and *Apatosaurus* (right) at the AMNH]]
This list of dinosaurs is a comprehensive listing of all genera that have ever been considered to be non-avian dinosaurs, but also includes some dinosaurs of disputed status (avian? or non-avian?, where "avian" refers to the clade Avialae), as well as purely vernacular terms.

The list includes all commonly accepted genera, but also genera that are now considered invalid, doubtful (*nomen dubium*), or were not formally published (*nomen nudum*), as well as junior synonyms and genera that are no longer considered dinosaurs. Many listed names have been reclassified as everything from true birds to crocodilians to petrified wood. The list contains 1764 names, of which approximately 1328 are considered either valid dinosaur genera or *nomina dubia*.

## Scope and terminology

There is no official, canonical list of all non-avian dinosaur genera. The closest is the *Dinosaur Genera List*, compiled by biological nomenclature expert George Olshevsky, which was first published online in 1995 and was regularly updated until June 2021. The most authoritative general source in the field is the second (2004) edition of *The Dinosauria*. The vast majority of names listed below are sourced to Olshevsky's list, and all subjective determinations (such as junior synonymy or non-dinosaurian status) are based on *The Dinosauria*, except where they conflict with primary literature. These exceptions are noted.

Naming conventions and terminology follow the International Code of Zoological Nomenclature. Technical terms used include:

* **Junior synonym**: A name which describes the same taxon as a previously published name. If two or more genera are formally designated and the type specimens are later assigned to the same genus, the first to be published (in chronological order) is the senior synonym, and all other instances are junior synonyms. Senior synonyms are generally used, except by special decision of the ICZN (see *Tyrannosaurus*), but junior synonyms cannot be used again for a different genus, even if deprecated. Junior synonymy is often subjective, unless the genera described were both based on the same type specimen.
* ***Nomen nudum*** (Latin for "naked name"): A name that has appeared in print but has not yet been formally published by the standards of the ICZN. *Nomina nuda* (the plural form) are invalid, and are therefore not italicized as a proper generic name would be. If the name is later formally published, that name is no longer a *nomen nudum* and will be italicized on this list. Often, the formally published name will differ from any *nomina nuda* that describe the same specimen.
* ***Nomen oblitum*** (Latin for "forgotten name"): A name that has not been used in the scientific community for more than fifty years after its original proposal.
* ***Nomen manuscriptum*** (Latin for "manuscript name"): A name that appears in manuscript of a formal publication that has no scientific backing.
* **Preoccupied name**: A name that is formally published, but which has already been used for another taxon. This second use is invalid (as are all subsequent uses) and the name must be replaced. Preoccupied names are not valid generic names.
* ***Nomen dubium*** (Latin for "dubious name"): A name describing a fossil with no unique diagnostic features. As this can be an extremely subjective and controversial designation (see *Hadrosaurus*), no genera should be marked as such on this list.

A

* *Aachenosaurus* – subsequently found to be a piece of petrified wood
* *Aardonyx*
* "Abdallahsaurus" – *nomen nudum*, synonym of *Giraffatitan*
* *Abdarainurus*
* *Abditosaurus*
* *Abelisaurus*
* *Abrictosaurus*
* *Abrosaurus*
* *Abydosaurus*
* *Acantholipan*
* *Acanthopholis*
* *Achelousaurus*
* *Acheroraptor*
* *Achillesaurus*
* *Achillobator*
* *Acristavus*
* *Acrocanthosaurus*

[[null|link=https://en.m.wikipedia.org/wiki/File:Allosaurus\_SDNHM.jpg%7Calt=%7Cthumb%7CReplica of an *Allosaurus* skeleton.]]

* *Acrotholus*
* *Actiosaurus* – subsequently found to be a choristoderan
* *Adamantisaurus*
* *Adasaurus*
* *Adelolophus*
* *Adeopapposaurus*
* *Adratiklit*
* *Adynomosaurus*
* *Aegyptosaurus*
* *Aeolosaurus*
* *Aepisaurus*
* *Aepyornithomimus*
* *Aerosteon*
* *Aetonyx* – junior synonym of *Massospondylus*
* *Afromimus*
* *Afrovenator*
* *Agathaumas* – possible synonym of *Triceratops*
* *Aggiosaurus* – subsequently found to be a metriorhynchid crocodilian
* *Agilisaurus*
* *Agnosphitys* – possibly non-dinosaurian
* *Agrosaurus* – probably a junior synonym of *Thecodontosaurus*
* *Agujaceratops*
* *Agustinia*
* *Ahshislepelta*
* "Airakoraptor" – *nomen nudum*; *Kuru*
* *Ajancingenia* – synonym of *Heyuannia*
* *Ajkaceratops*
* *Ajnabia*
* *Akainacephalus*
* *Alamosaurus*
* *Alaskacephale*
* *Albalophosaurus*
* *Albertaceratops*
* *Albertadromeus*
* *Albertavenator*
* *Albertonykus*
* *Albertosaurus*
* *Albinykus*
* *Albisaurus* – subsequently found to be a non-dinosaurian reptile
* *Alcovasaurus* – possible junior synonym of *Miragaia*
* *Alectrosaurus*
* *Aletopelta*

[[null|link=https://en.m.wikipedia.org/wiki/File:Amargasaurus\_Reconstruction\_Fred\_Wierum.png%7Calt=%7Cthumb%7CArtist's reconstruction of *Amargasaurus*.]]

* *Algoasaurus*
* *Alioramus*
* *Aliwalia* – junior synonym of *Eucnemesaurus*
* *Allosaurus*
* *Almas*
* *Alnashetri*
* *Alocodon*
* *Altirhinus*
* *Altispinax*
* *Alvarezsaurus*
* *Alwalkeria*
* *Alxasaurus*
* *Amanasaurus* – possibly non-dinosaurian
* *Amanzia*
* *Amargasaurus*
* "Amargastegos" – *nomen nudum*
* *Amargatitanis*
* *Amazonsaurus*
* *Ambopteryx*
* *Ammosaurus* – junior synonym of *Anchisaurus*
* *Ampelognathus*
* *Ampelosaurus*
* *Amphicoelias*
* "Amphicoelicaudia" – *nomen nudum*; synonym of *Huabeisaurus*
* "*Amphisaurus*" – preoccupied name, now known as *Anchisaurus*
* *Amtocephale*
* *Amtosaurus* – possibly a junior synonym of *Talarurus*
* *Amurosaurus*
* *Amygdalodon*
* *Anabisetia*
* *Analong*
* *Anasazisaurus*
* *Anatosaurus* – junior synonym of *Edmontosaurus*
* *Anatotitan* – junior synonym of *Edmontosaurus*
* *Anchiceratops*
* *Anchiornis*
* *Anchisaurus*
* *Andesaurus*

[[null|link=https://en.m.wikipedia.org/wiki/File:Anzu\_wyliei.jpg%7Calt=%7Cthumb%7CArtist's reconstruction of *Anzu*.]]

* "Andhrasaurus" – *nomen nudum*
* *Angaturama* – possible junior synonym of *Irritator*
* "Angloposeidon" – *nomen nudum*
* *Angolatitan*
* *Angulomastacator*
* *Anhuilong*
* *Aniksosaurus*
* *Animantarx*
* *Ankistrodon* – subsequently found to be a proterosuchid archosauriform
* *Ankylosaurus*
* *Anodontosaurus*
* *Anomalipes*
* *Anoplosaurus*
* *Anserimimus*
* *Antarctopelta*
* *Antarctosaurus*
* *Antetonitrus*
* *Anthodon* – subsequently found to be a pareiasaur
* *Antrodemus* – possibly a synonym of *Allosaurus*
* *Anzu*
* *Aoniraptor*
* *Aorun*
* *Apatodon* – possibly a junior synonym of *Allosaurus*
* *Apatoraptor*
* *Apatosaurus*
* *Appalachiosaurus*
* *Aquilarhinus*
* *Aquilops*
* *Arackar*
* *Aragosaurus*
* *Aralosaurus*
* *Aratasaurus*
* "Araucanoraptor" – *nomen nudum*; *Neuquenraptor*
* *Archaeoceratops*
* *Archaeodontosaurus*

[[null|link=https://en.m.wikipedia.org/wiki/File:Archaeoceratops\_BW.jpg%7Calt=%7Cthumb%7CArtist's restoration of *Archaeoceratops*.]]

* *Archaeopteryx* – possibly a bird
* *Archaeoraptor* – a chimaera of the bird*Yanornis* and the dromaeosaur *Microraptor*
* *Archaeornis* – junior synonym of *Archaeopteryx*
* *Archaeornithoides*
* *Archaeornithomimus*
* *Arcovenator*
* *Arctosaurus* – subsequently found to be a non-dinosaurian reptile
* *Arcusaurus*
* *Arenysaurus*
* *Argentinosaurus*
* *Argyrosaurus*
* *Aristosaurus* – junior synonym of *Massospondylus*
* *Aristosuchus*
* *Arizonasaurus* – subsequently found to be a rauisuchian
* *Arkansaurus*
* *Arkharavia*
* *Arrhinoceratops*
* *Arrudatitan*
* *Arstanosaurus*
* *Asfaltovenator*
* *Asiaceratops*
* *Asiamericana* – a fish
* *Asiatosaurus*
* *Asilisaurus* – possibly non-dinosaurian
* *Astrodon*
* *Astrodonius* – junior synonym of *Astrodon*
* *Astrodontaurus* – junior synonym of *Astrodon*
* *Astrophocaudia*
* *Asylosaurus*
* *Atacamatitan*
* *Atlantosaurus*
* *Atlasaurus*
* *Atlascopcosaurus*
* *Atrociraptor*
* *Atsinganosaurus*

[[null|link=https://en.m.wikipedia.org/wiki/File:Austroraptor\_Restoration.png%7Calt=%7Cthumb%7CArtist's restoration of *Austroraptor*.]]

* *Aublysodon*
* *Aucasaurus*
* "*Augustia*" – preoccupied name, now known as *Agustinia*
* *Augustynolophus*
* *Auroraceratops*
* *Aurornis*
* *Australodocus*
* *Australotitan*
* *Australovenator*
* *Austrocheirus*
* *Austroposeidon*
* *Austroraptor*
* *Austrosaurus*
* *Avaceratops*
* "*Avalonia*" – preoccupied name, now known as *Avalonianus*
* *Avalonianus* – subsequently found to be a non-dinosaurian archosaur
* *Aviatyrannis*
* *Avimimus*
* *Avipes* – probably a non-dinosaurian dinosauromorph
* *Avisaurus* – subsequently found to be an enantiornithine bird
* *Azendohsaurus* – subsequently found to be a non-dinosaurian archosauromorph

B

* *Baalsaurus*
* *Bactrosaurus*
* *Bagaceratops*
* *Bagaraatan*
* *Bagualia*
* *Bagualosaurus*
* *Bahariasaurus*
* *Bainoceratops*
* *Bajadasaurus*
* "Bakesaurus" – *nomen nudum*; *Bactrosaurus*
* *Balaur* – possibly a bird
* "Balochisaurus" – *nomen nudum*
* *Bambiraptor*
* *Banji*
* *Bannykus*

[[null|link=https://en.m.wikipedia.org/wiki/File:Baryonyx\_walkeri\_mount\_NMNS.jpg%7Calt=%7Cthumb%7CReconstructed skeletal mount of *Baryonyx* at the National Museum of Nature and Science, Tokyo.]]

* *Baotianmansaurus*
* *Barapasaurus*
* *Barilium*
* *Barosaurus*
* *Barrosasaurus*
* *Barsboldia*
* *Baryonyx*
* *Bashanosaurus*
* *Bashunosaurus*
* *Basutodon* – subsequently found to be a non-dinosaurian archosaur
* *Bathygnathus* – a pelycosaur, *Dimetrodon*
* *Batyrosaurus*
* *Baurutitan*
* *Bayannurosaurus*
* "Bayosaurus" – *nomen nudum*
* *Becklespinax* – junior synonym of *Altispinax*
* "Beelemodon" – *nomen nudum*
* *Beg*
* *Beibeilong*
* *Beipiaognathus* – chimera of several unnamed dinosaurs
* *Beipiaosaurus*
* *Beishanlong*
* *Bellusaurus*
* *Belodon* – subsequently found to be a phytosaur
* *Berberosaurus*
* *Berthasaura*
* *Betasuchus*
* *Bicentenaria*
* *Bienosaurus*
* "Bihariosaurus" – *nomen nudum*
* "Bilbeyhallorum" – *nomen nudum*; *Cedarpelta*
* *Bissektipelta*
* *Bistahieversor*
* *Bisticeratops*
* "Blancocerosaurus" – *nomen nudum*, synonym of *Giraffatitan*
* *Blasisaurus*
* *Blikanasaurus*
* *Bolong*
* *Bonapartenykus*
* *Bonapartesaurus*
* *Bonatitan*
* *Bonitasaura*
* *Borealopelta*
* *Borealosaurus*
* *Boreonykus*
* *Borogovia*
* *Bothriospondylus*
* *Brachiosaurus*
* *Brachyceratops*
* *Brachylophosaurus*
* *Brachypodosaurus*
* *Brachyrophus* – junior synonym of *Camptosaurus*

[[null|link=https://en.m.wikipedia.org/wiki/File:Borealopelta\_NT.jpg%7Calt=%7Cthumb%7CArtist's restoration of *Borealopelta*.]]

* *Brachytaenius* – subsequently found to be a metriorhynchid; junior objective synonym of *Dakosaurus* or *Geosaurus*
* *Brachytrachelopan*
* *Bradycneme*
* *Brasileosaurus* – subsequently found to be a non-dinosaurian archosaur
* *Brasilotitan*
* *Bravasaurus*
* *Bravoceratops*
* *Breviceratops*
* *Brighstoneus*
* *Brohisaurus*
* *Brontomerus*
* "Brontoraptor" – *nomen nudum*, synonym of *Torvosaurus*
* *Brontosaurus*
* *Bruhathkayosaurus*
* *Bugenasaura* – junior synonym of *Thescelosaurus*
* *Buitreraptor*
* *Burianosaurus*
* *Buriolestes*
* *Bustingorrytitan*
* "Byranjaffia" – *nomen nudum*; *Byronosaurus*
* *Byronosaurus*

C

* *Caenagnathasia*
* *Caenagnathus*
* *Caieiria*
* *Caihong*
* *Calamosaurus*
* "*Calamospondylus*" – preoccupied name, now known as *Calamosaurus*
* *Calamospondylus*
* *Callovosaurus*
* *Calvarius*
* *Camarasaurus*
* *Camarillasaurus*
* *Camelotia*
* *Camposaurus*
* "*Camptonotus*" – preoccupied name, now known as *Camptosaurus*
* *Camptosaurus*
* "*Campylodon*" – preoccupied name, now known as *Campylodoniscus*
* *Campylodoniscus*
* *Canardia*
* "Capitalsaurus" – *nomen nudum*
* *Carcharodontosaurus*
* *Cardiodon*
* *Carnotaurus*
* *Caseosaurus*
* *Cathartesaura*
* *Cathetosaurus* — possibly a species of *Camarasaurus*

[[null|link=https://en.m.wikipedia.org/wiki/File:Centrosaurus.JPG%7Calt=%7Cthumb%7C*Centrosaurus* skull.]]

* *Caudipteryx*
* *Caudocoelus* – junior synonym of *Teinurosaurus*
* *Caulodon* – junior synonym of *Camarasaurus*
* *Cedarosaurus*
* *Cedarpelta*
* *Cedrorestes*
* *Centemodon* – subsequently found to be a phytosaur
* *Centrosaurus*
* *Cerasinops*
* *Ceratonykus*
* *Ceratops*
* *Ceratosaurus*
* *Ceratosuchops*
* *Cetiosauriscus*
* *Cetiosaurus*
* *Changchunsaurus*
* "Changdusaurus" – *nomen nudum*
* *Changmiania*
* *Changyuraptor*
* *Chaoyangsaurus*
* *Charonosaurus*
* *Chasmosaurus*
* *Chassternbergia* – junior synonym of *Edmontonia*
* *Chebsaurus*
* *Chenanisaurus*
* *Cheneosaurus* – junior synonym of *Hypacrosaurus*
* *Chialingosaurus*
* *Chiayusaurus*
* *Chienkosaurus* – possible junior synonym of *Szechuanosaurus*
* "Chihuahuasaurus" – *nomen nudum*; *Sonorasaurus*
* *Chilantaisaurus*
* *Chilesaurus*
* *Chindesaurus*
* *Chingkankousaurus*
* *Chinshakiangosaurus*
* *Chirostenotes*
* *Choconsaurus*
* *Chondrosteosaurus*

[[null|link=https://en.m.wikipedia.org/wiki/File:Ceratosaurus\_nasicornis\_DB.jpg%7Calt=%7Cthumb%7CArtist's restoration of *Ceratosaurus*.]]

* *Choyrodon*
* *Chromogisaurus*
* *Chuandongocoelurus*
* *Chuanjiesaurus*
* *Chuanqilong*
* *Chubutisaurus*
* *Chucarosaurus*
* *Chungkingosaurus*
* *Chuxiongosaurus*
* "Cinizasaurus" – *nomen nudum*
* *Cionodon*
* *Citipati*
* *Citipes*
* *Cladeiodon* – subsequently found to be a non-dinosaurian rauisuchian; synonym of *Teratosaurus*
* *Claorhynchus* – possibly *Triceratops*
* *Claosaurus*
* *Clarencea* – subsequently found to be a sphenosuchian; synonym of *Sphenosuchus*
* *Clasmodosaurus*
* *Clepsysaurus* – subsequently found to be a phytosaur, possibly *Palaeosaurus*
* *Coahuilaceratops*
* *Coelophysis*
* "*Coelosaurus*" – preoccupied genus name, species "*Coelosaurus*" *antiquus*
* *Coeluroides*
* *Coelurosauravus* – subsequently found to be a primitive diapsid
* *Coelurus*
* *Colepiocephale*
* "*Coloradia*" – preoccupied name, now known as *Coloradisaurus*
* *Coloradisaurus*
* "Colossosaurus" – *nomen nudum*; *Pelorosaurus*
* *Comahuesaurus*
* "Comanchesaurus" – *nomen nudum*
* *Compsognathus*

[[null|link=https://en.m.wikipedia.org/wiki/File:Coelophysis\_bauri\_mount.jpg%7Calt=%7Cthumb%7C*Coelophysis* mounted skeleton at the Cleveland Museum of Natural History.]]

* *Compsosuchus*
* *Concavenator*
* *Conchoraptor*
* *Condorraptor*
* *Convolosaurus*
* *Coronosaurus*
* *Corythoraptor*
* *Corythosaurus*
* *Craspedodon*
* *Crataeomus* – junior synonym of *Struthiosaurus*
* *Craterosaurus*
* *Creosaurus* – junior synonym of *Allosaurus*
* *Crichtonpelta*
* *Crichtonsaurus*
* *Cristatusaurus*
* *Crittendenceratops*
* *Crosbysaurus* – subsequently found to be a non-dinosaurian archosauriform
* *Cruxicheiros*
* *Cryolophosaurus*
* *Cryptodraco* – junior synonym (unneeded replacement name) of *Cryptosaurus*
* "Cryptoraptor" – *nomen nudum*
* *Cryptosaurus*
* *Cryptovolans* – junior synonym of *Microraptor*
* *Cumnoria*

D

* *Daanosaurus*
* *Dacentrurus*
* "Dachongosaurus" – *nomen nudum*
* *Daemonosaurus*
* *Dahalokely*
* *Dakosaurus* – subsequently found to be a metriorhynchid crocodilian
* *Dakotadon*
* *Dakotaraptor*
* *Daliansaurus*
* "Damalasaurus" – *nomen nudum*
* *Dandakosaurus*
* *Danubiosaurus* – junior synonym of *Struthiosaurus*
* "Daptosaurus" – *nomen nudum*; early manuscript name for *Deinonychus*
* *Darwinsaurus* – junior synonym of *Hypselospinus* or *Mantellisaurus*
* *Dashanpusaurus*
* *Daspletosaurus*
* *Dasygnathoides* – subsequently found to be a non-dinosaurian archosaur; possible junior synonym of *Ornithosuchus*
* "*Dasygnathus*" – preoccupied name, now known as *Dasygnathoides*
* *Datanglong*

[[null|link=https://en.m.wikipedia.org/wiki/File:Hypothetical\_Deinocheirus.jpg%7Calt=%7Cthumb%7CArtist's restoration of *Deinocheirus*.]]

* *Datonglong*
* *Datousaurus*
* *Daurlong*
* *Daurosaurus* – synonym of *Kulindadromeus*
* *Daxiatitan*
* *Deinocheirus*
* *Deinodon* – possibly *Gorgosaurus*
* *Deinonychus*
* *Delapparentia* – junior synonym of *Iguanodon*
* *Deltadromeus*
* *Demandasaurus*
* *Denversaurus*
* *Deuterosaurus* – subsequently found to be a therapsid
* *Diabloceratops*
* *Diamantinasaurus*
* *Dianchungosaurus* – subsequently found to be a crocodilian
* "*Diceratops*" – preoccupied name, now known as *Nedoceratops*
* *Diceratus* – junior synonym of *Nedoceratops*
* *Diclonius*
* *Dicraeosaurus*
* *Didanodon* – synonym of *Lambeosaurus*; possibly a *nomen nudum*
* *Dilong*
* *Dilophosaurus*
* *Diluvicursor*
* *Dimodosaurus* – junior synonym of *Plateosaurus*
* *Dineobellator*
* *Dinheirosaurus* – possible junior synonym of *Supersaurus*
* *Dinodocus*
* "*Dinosaurus*" – preoccupied name for a junior synonym of *Brithopus*; now a junior synonym of *Plateosaurus*

[[null|link=https://en.m.wikipedia.org/wiki/File:Diamantinasaurus.png%7Calt=%7Cthumb%7CArtist's restoration of *Diamantinasaurus*.]]

* *Dinotyrannus* – junior synonym *Tyrannosaurus* or some other tyrannosaurid
* *Diodorus* – possibly non-dinosaurian
* *Diplodocus*
* *Diplotomodon*
* *Diracodon* – junior synonym of *Stegosaurus*
* *Dolichosuchus*
* *Dollodon* – junior synonym of *Mantellisaurus*
* "Domeykosaurus" – *nomen nudum*, synonym of *Arackar*
* *Dongbeititan*
* *Dongyangopelta*
* *Dongyangosaurus*
* *Doratodon* – subsequently found to be a crocodilian
* *Doryphorosaurus* – junior synonym (unneeded replacement name) of *Kentrosaurus*
* *Draconyx*
* *Dracopelta*
* *Dracoraptor*
* *Dracorex* – junior synonym of *Pachycephalosaurus*
* *Dracovenator*
* *Dravidosaurus* – possibly non-dinosaurian
* *Dreadnoughtus*
* *Drinker* – junior synonym of *Nanosaurus*
* *Dromaeosauroides*
* *Dromaeosaurus*
* *Dromiceiomimus*
* *Dromicosaurus* – junior synonym of *Massospondylus*
* *Drusilasaura*
* *Dryosaurus*

[[null|link=https://en.m.wikipedia.org/wiki/File:Dryosaurus\_lettowvorbecki\_skeleton.jpg%7Calt=%7Cthumb%7CA *Dysalotosaurus* skeleton.]]

* *Dryptosauroides*
* *Dryptosaurus*
* *Dubreuillosaurus*
* "Duranteceratops" – *nomen nudum*
* *Duriatitan*
* *Duriavenator*
* *Dynamosaurus* – junior synonym of *Tyrannosaurus*
* *Dynamoterror*
* *Dyoplosaurus*
* *Dysalotosaurus*
* *Dysganus*
* *Dyslocosaurus*
* *Dystrophaeus*
* *Dystylosaurus* – junior synonym of *Supersaurus*
* *Dzharaonyx*
* *Dzharatitanis*

E

* *Echinodon*
* *Edmarka* – junior synonym of *Torvosaurus*
* *Edmontonia*
* *Edmontosaurus*
* *Efraasia*

[[null|link=https://en.m.wikipedia.org/wiki/File:Eoraptor\_Japan.jpg%7Calt=%7Cthumb%7CReplica of an *Eoraptor* skeleton.]]

* *Einiosaurus*
* *Ekrixinatosaurus*
* *Elachistosuchus* – subsequently found to be a rhynchocephalian
* *Elaltitan*
* *Elaphrosaurus*
* *Elemgasem*
* *Elmisaurus*
* *Elopteryx*
* *Elosaurus* – junior synonym of *Brontosaurus*
* *Elrhazosaurus*
* "Elvisaurus" – *nomen nudum*; *Cryolophosaurus*
* *Emausaurus*
* *Embasaurus*
* *Enigmosaurus*
* *Eoabelisaurus*
* *Eobrontosaurus* – junior synonym of *Brontosaurus*
* *Eocarcharia*
* *Eoceratops* – junior synonym of *Chasmosaurus*
* *Eocursor*
* *Eodromaeus*
* "Eohadrosaurus" – *nomen nudum*; *Eolambia*
* *Eolambia*
* *Eomamenchisaurus*
* "Eoplophysis" – *nomen nudum*
* *Eoraptor*
* *Eosinopteryx*
* *Eotrachodon*
* *Eotriceratops*
* *Eotyrannus*
* *Eousdryosaurus*
* *Epachthosaurus*
* *Epanterias* – may be *Allosaurus*
* "Ephoenosaurus" – *nomen nudum*; *Machimosaurus* (a crocodilian)
* *Epicampodon* – subsequently found to be a proterosuchid archosauriform, *Ankistrodon*
* *Epichirostenotes*
* *Epidendrosaurus* – synonym of *Scansoriopteryx*
* *Epidexipteryx*
* *Equijubus*
* *Erectopus*
* *Erketu*

[[null|link=https://en.m.wikipedia.org/wiki/File:Euoplocephalus\_BW.jpg%7Calt=%7Cthumb%7CLife restoration of *Euoplocephalus*.]]

* *Erliansaurus*
* *Erlikosaurus*
* *Erythrovenator*
* *Eshanosaurus*
* "Euacanthus" – *nomen nudum*; junior synonym of *Polacanthus*
* *Eucamerotus*
* *Eucentrosaurus* – junior synonym (unneeded replacement name) of *Centrosaurus*
* *Eucercosaurus*
* *Eucnemesaurus*
* *Eucoelophysis* – possibly non-dinosaurian
* "Eugongbusaurus" – *nomen nudum*
* *Euhelopus*
* *Euoplocephalus*
* *Eupodosaurus* – subsequently found to be a nothosaur synonymous with *Lariosaurus*
* "Eureodon" – *nomen nudum*; *Tenontosaurus*
* *Eurolimnornis* – subsequently found to be a pterosaur
* *Euronychodon*
* *Europasaurus*
* *Europatitan*
* *Europelta*
* *Euskelosaurus*
* *Eustreptospondylus*

F

* *Fabrosaurus* – possibly *Lesothosaurus*
* *Falcarius*
* "Fendusaurus" – *nomen nudum*
* "Fenestrosaurus" – *nomen nudum*; *Oviraptor*
* *Ferganasaurus*
* "Ferganastegos" – *nomen nudum*
* *Ferganocephale*
* *Ferrisaurus*
* *Foraminacephale*
* *Fosterovenator*
* *Fostoria*
* *Frenguellisaurus* – junior synonym of *Herrerasaurus*

[[null|link=https://en.m.wikipedia.org/wiki/File:Fruitadens\_NT.jpg%7Calt=%7Cthumb%7CLife restoration of *Fruitadens*.]]

* *Fruitadens*
* *Fujianvenator*
* *Fukuiraptor*
* *Fukuisaurus*
* *Fukuititan*
* *Fukuivenator*
* *Fulengia*
* *Fulgurotherium*
* *Furcatoceratops*
* *Fushanosaurus*
* "Fusinasus" – *nomen nudum*; *Eotyrannus*
* *Fusuisaurus*
* "Futabasaurus" – *nomen nudum*; not to be confused with the formally named plesiosaur*Futabasaurus*
* *Futalognkosaurus*
* *Fylax*

G

* "Gadolosaurus" – *nomen nudum*
* *Galeamopus*
* *Galesaurus* – subsequently found to be a therapsid
* *Galleonosaurus*
* *Gallimimus*
* *Galtonia* – subsequently found to be a pseudosuchian; possibly a junior synonym of *Revueltosaurus*
* *Galveosaurus* – synonym of *Galvesaurus*
* *Galvesaurus*
* *Gamatavus* — possibly non-dinosaurian
* *Gannansaurus*
* "Gansutitan" – *nomen nudum*; *Daxiatitan*
* *Ganzhousaurus*
* *Gargoyleosaurus*
* *Garrigatitan*
* *Garudimimus*
* *Garumbatitan*
* *Gasosaurus*

[[null|link=https://en.m.wikipedia.org/wiki/File:Giganotos\_Db.jpg%7Calt=%7Cthumb%7CArtist's restoration of *Giganotosaurus*.]]

* *Gasparinisaura*
* *Gastonia*
* "Gavinosaurus" – *nomen nudum*; *Eotyrannus*
* *Geminiraptor*
* *Genusaurus*
* *Genyodectes*
* *Geranosaurus*
* *Gideonmantellia*
* *Giganotosaurus*
* *Gigantoraptor*
* "*Gigantosaurus*" – preoccupied name, now known as *Tornieria*
* *Gigantosaurus*
* *Gigantoscelus* – Probable junior synonym of *Euskelosaurus*
* *Gigantspinosaurus*
* *Gilmoreosaurus*
* "Ginnareemimus" – *nomen nudum*; *Kinnareemimus*
* *Giraffatitan*
* *Glacialisaurus*
* *Glishades*
* *Glyptodontopelta*
* *Gnathovorax*
* *Gobiceratops* – possibly a junior synonym of *Bagaceratops*
* *Gobihadros*
* *Gobiraptor*
* *Gobisaurus*
* *Gobititan*
* *Gobivenator*
* "Godzillasaurus" – *nomen nudum*; *Gojirasaurus*
* *Gojirasaurus*
* *Gondwanatitan*
* *Gongbusaurus*
* *Gongpoquansaurus*
* *Gongxianosaurus*
* *Gonkoken*
* *Gorgosaurus*
* *Goyocephale*

[[null|link=https://en.m.wikipedia.org/wiki/File:Giraffatitan\_DB.jpg%7Calt=%7Cthumb%7CArtist's reconstruction of *Giraffatitan*.]]

* *Graciliceratops*
* *Graciliraptor*
* *Gracilisuchus* – subsequently found to be a non-dinosaurian archosaur
* *Gravitholus*
* *Gremlin*
* *Gresslyosaurus* – possible junior synonym of *Plateosaurus*
* *Griphornis* – junior synonym of *Archaeopteryx*
* *Griphosaurus* – junior synonym of *Archaeopteryx*
* *Gryphoceratops*
* *Gryponyx*
* *Gryposaurus*
* "Gspsaurus" – *nomen nudum*
* *Guaibasaurus*
* *Gualicho*
* *Guanlong*
* *Guemesia*
* *Gwyneddosaurus* – subsequently found to be a tanystrophid
* *Gyposaurus* – possibly a junior synonym of *Massospondylus*

H

* "Hadrosauravus" – *nomen nudum*; junior synonym of *Gryposaurus*
* *Hadrosaurus*
* *Haestasaurus*
* *Hagryphus*
* *Hallopus* – subsequently found to be a crocodylomorph
* *Halszkaraptor*
* *Halticosaurus*
* *Hamititan*
* *Hanssuesia*
* "Hanwulosaurus" – *nomen nudum*
* *Haplocanthosaurus*
* "*Haplocanthus*" – preoccupied name, now known as *Haplocanthosaurus*
* *Haplocheirus*
* *Harpymimus*
* *Haya*
* *Hecatasaurus* – junior synonym of *Telmatosaurus*
* "Heilongjiangosaurus" – *nomen nudum*
* *Heishansaurus*
* *Helioceratops*

[[null|link=https://en.m.wikipedia.org/wiki/File:Huaxiagnathus\_orientalis.JPG%7Calt=%7Cthumb%7C*Huaxiagnathus* fossil displayed in Hong Kong Science Museum]]

* "*Helopus*" – preoccupied name, now known as *Euhelopus*
* *Heptasteornis*
* *Herbstosaurus* – subsequently found to be a pterosaur
* *Herrerasaurus*
* *Hesperonychus*
* *Hesperornithoides*
* *Hesperosaurus*
* *Heterodontosaurus*
* *Heterosaurus* – possible synonym of *Mantellisaurus*
* *Hexing*
* *Hexinlusaurus*
* *Heyuannia*
* *Hierosaurus*
* *Hikanodon* – junior synonym of *Iguanodon*
* *Hippodraco*
* "Hironosaurus" – *nomen nudum*
* "Hisanohamasaurus" – *nomen nudum*
* *Histriasaurus*
* *Homalocephale*
* "Honghesaurus" – *nomen nudum* later described as *Yandusaurus*; name later used for a genus of marine reptile
* *Hongshanosaurus* – junior synonym of *Psittacosaurus*
* *Hoplitosaurus*
* *Hoplosaurus* – junior synonym of *Struthiosaurus*
* *Horshamosaurus*
* *Hortalotarsus* – possible junior synonym of *Massospondylus*
* *Huabeisaurus*
* *Hualianceratops*
* *Huallasaurus*
* *Huanansaurus*
* *Huanghetitan*
* *Huangshanlong*
* *Huaxiagnathus*
* *Huaxiaosaurus* – junior synonym of *Shantungosaurus*
* "Huaxiasaurus" – *nomen nudum*; *Huaxiagnathus*
* *Huayangosaurus*
* *Hudiesaurus*
* *Huehuecanauhtlus*

[[null|link=https://en.m.wikipedia.org/wiki/File:Hypsilophodon\_foxii\_1.jpg%7Calt=%7Cthumb%7CSkeleton of *Hypsilophodon*.]]

* *Huinculsaurus*
* *Hulsanpes*
* *Hungarosaurus*
* *Huxleysaurus* – junior synonym of *Hypselospinus*
* *Hylaeosaurus*
* *Hylosaurus* – junior synonym of *Hylaeosaurus*
* *Hypacrosaurus*
* *Hypselorhachis* – subsequently found to be a ctenosauriscid
* *Hypselosaurus*
* *Hypselospinus*
* *Hypsibema*
* *Hypsilophodon*
* *Hypsirhophus*

I

* *Iani*
* *Iberospinus*
* *Ibirania*
* "Ichabodcraniosaurus" – *nomen nudum*; *Shri*
* *Ichthyovenator*
* *Igai*
* *Ignavusaurus*
* *Ignotosaurus* – possibly non-dinosaurian
* *Iguanacolossus*
* *Iguanodon*
* "Iguanoides" – *nomen nudum*; *Iguanodon*
* "Iguanosaurus" – *nomen nudum*; *Iguanodon*
* *Iliosuchus*
* *Ilokelesia*
* *Imperobator*
* *Inawentu*
* *Incisivosaurus*
* *Indosaurus*
* *Indosuchus*
* "*Ingenia*" – preoccupied name, now known as *Heyuannia yanshini*
* *Ingentia*
* *Inosaurus*
* *Invictarx*
* *Irisosaurus*

[[null|link=https://en.m.wikipedia.org/wiki/File:Iguanodon\_NT.jpg%7Calt=%7Cthumb%7CArtist's reconstruction of *Iguanodon*.]]

* *Irritator*
* *Isaberrysaura*
* *Isanosaurus*
* *Isasicursor*
* *Ischioceratops*
* *Ischisaurus* – junior synonym of *Herrerasaurus*
* "*Ischyrosaurus*" – preoccupied genus name, species *Ischyrosaurus manseli*
* *Isisaurus*
* "Issasaurus" – *nomen nudum*; *Dicraeosaurus*
* *Issi*
* *Itapeuasaurus*
* *Itemirus*
* *Iuticosaurus*
* *Iyuku*

J

* *Jaculinykus*
* *Jainosaurus*
* *Jakapil*
* *Jaklapallisaurus*
* *Janenschia*
* *Jaxartosaurus*
* *Jeholosaurus*
* *Jenghizkhan* – junior synonym of *Tarbosaurus*
* "Jensenosaurus" – *nomen nudum*; *Supersaurus*
* *Jeyawati*
* *Jianchangosaurus*
* "Jiangjunmiaosaurus" – *nomen nudum*; *Monolophosaurus*
* *Jiangjunosaurus*
* *Jiangshanosaurus*

[[null|link=https://en.m.wikipedia.org/wiki/File:Jinfengopteryx\_wiki.jpg%7Calt=%7Cthumb%7CLife restoration of *Jinfengopteryx*.]]

* *Jiangxisaurus*
* *Jiangxititan*
* *Jianianhualong*
* *Jinbeisaurus*
* *Jinfengopteryx*
* *Jingshanosaurus*
* *Jintasaurus*
* *Jinyunpelta*
* *Jinzhousaurus*
* *Jiutaisaurus*
* *Jobaria*
* *Jubbulpuria*
* *Judiceratops*
* *Jurapteryx* – junior synonym of *Archaeopteryx*
* "Jurassosaurus" – *nomen nudum*; *Tianchisaurus*
* *Juratyrant*
* *Juravenator*

K

* *Kaatedocus*
* "Kagasaurus" – *nomen nudum*
* *Kaijiangosaurus*
* *Kaijutitan*
* *Kakuru*
* *Kamuysaurus*
* *Kangnasaurus*
* *Kansaignathus*
* *Karongasaurus*
* *Katepensaurus*
* "Katsuyamasaurus" – *nomen nudum*
* *Kayentavenator*
* *Kazaklambia*
* *Kelmayisaurus*
* *Kelumapusaura*
* *Kemkemia* – subsequently found to be a crocodyliform
* *Kentrosaurus*
* *Kentrurosaurus* – junior synonym (unneeded replacement name) of *Kentrosaurus*
* *Kerberosaurus*

[[null|link=https://en.m.wikipedia.org/wiki/File:Berlin\_Naturkundemuseum\_Dino\_Eingangshalle.jpg%7Calt=%7Cthumb%7C*Kentrosaurus* skeleton.]]

* *Khaan*
* "Khetranisaurus" – *nomen nudum*
* *Kholumolumo*
* *Khulsanurus*
* *Kileskus*
* *Kinnareemimus*
* "Kitadanisaurus" – *nomen nudum*; *Fukuiraptor*
* "Kittysaurus" – *nomen nudum*; *Eotyrannus*
* *Klamelisaurus*
* *Kol*
* *Koparion*
* *Koreaceratops*
* *Koreanosaurus*
* "Koreanosaurus" – *nomen nudum*; name later used formally for a genus of ornithopod
* *Koshisaurus*
* *Kosmoceratops*
* *Kotasaurus*
* *Koutalisaurus* – possible junior synonym of *Pararhabdodon*
* *Kritosaurus*
* *Kryptops*
* *Krzyzanowskisaurus* – probably a pseudosuchian (*Revueltosaurus*?)
* *Kukufeldia* – junior synonym of *Barilium*
* *Kulceratops*
* *Kulindadromeus*
* *Kulindapteryx* – synonym of *Kulindadromeus*
* *Kunbarrasaurus*
* *Kundurosaurus*
* "Kunmingosaurus" – *nomen nudum*
* *Kuru*
* *Kurupi*
* *Kuszholia* – subsequently found to be a bird
* *Kwanasaurus* – possibly non-dinosaurian

L

* *Labocania*
* *Labrosaurus* – junior synonym of *Allosaurus*

[[null|link=https://en.m.wikipedia.org/wiki/File:Lambeosaurus\_magnicristatus\_DB.jpg%7Calt=%7Cthumb%7CArtist's restoration of *Lambeosaurus*.]]

* "*Laelaps*" – preoccupied name, now known as *Dryptosaurus*
* *Laevisuchus*
* *Lagerpeton* – subsequently found to be a non-dinosaurian pterosauromorph
* *Lagosuchus* – subsequently found to be a non-dinosaurian dinosauromorph
* *Laiyangosaurus*
* *Lajasvenator*
* *Lamaceratops* – possible junior synonym of *Bagaceratops*
* *Lambeosaurus*
* *Lametasaurus*
* *Lamplughsaura*
* *Lanasaurus* – junior synonym of *Lycorhinus*
* "Lancangosaurus" – variant spelling of "Lancanjiangosaurus"
* "Lancanjiangosaurus" – *nomen nudum*
* *Lanzhousaurus*
* *Laosaurus*
* *Lapampasaurus*
* *Laplatasaurus*
* *Lapparentosaurus*
* *Laquintasaura*
* *Latenivenatrix* – possible junior synonym of *Stenonychosaurus*
* *Latirhinus*
* *Lavocatisaurus*
* *Leaellynasaura*
* *Ledumahadi*
* *Leinkupal*
* *Leipsanosaurus* – junior synonym of *Struthiosaurus*
* "Lengosaurus" – *nomen nudum*; *Eotyrannus*
* *Leonerasaurus*
* *Lepidocheirosaurus* — junior synonym of *Kulindadromeus*
* *Lepidus*

[[null|link=https://en.m.wikipedia.org/wiki/File:Limusaurus\_runner.jpg%7Calt=%7Cthumb%7CArtist's restoration of *Limusaurus*.]]

* *Leptoceratops*
* *Leptorhynchos*
* *Leptospondylus* – junior synonym of *Massospondylus*
* *Leshansaurus*
* *Lesothosaurus*
* *Lessemsaurus*
* *Levnesovia*
* *Lewisuchus* – possibly non-dinosaurian
* *Lexovisaurus*
* *Leyesaurus*
* *Liaoceratops*
* *Liaoningosaurus*
* *Liaoningotitan*
* *Liaoningvenator*
* "Liassaurus" – *nomen nudum*; possible synonym of *Sarcosaurus*
* *Libycosaurus* – subsequently found to be an anthracothere mammal
* *Ligabueino*
* *Ligabuesaurus*
* "Ligomasaurus" – *nomen nudum*, synonym of *Giraffatitan*
* "Likhoelesaurus" – *nomen nudum*; possibly non-dinosaurian
* *Liliensternus*
* *Limaysaurus*
* "*Limnornis*" – preoccupied name, now known as *Palaeocursornis* ( a pterosaur)
* "*Limnosaurus*" – preoccupied name, now known as *Telmatosaurus*
* *Limusaurus*
* *Lingwulong*
* *Lingyuanosaurus*
* *Linhenykus*
* *Linheraptor*
* *Linhevenator*

[[null|link=https://en.m.wikipedia.org/wiki/File:Linhenykus\_monodactylus.jpg%7Calt=%7Cthumb%7CLife reconstruction of two individuals of *Linhenykus*in their arid Campanian-aged living environment.]]

* *Lirainosaurus*
* *Lisboasaurus* – subsequently found to be a crocodilian
* *Liubangosaurus*
* *Llukalkan*
* *Lohuecotitan*
* *Loncosaurus*
* *Longisquama* – subsequently found to be a non-dinosaurian reptile
* *Longosaurus* – junior synonym of *Coelophysis*
* *Lophorhothon*
* *Lophostropheus*
* *Loricatosaurus*
* *Loricosaurus*
* *Losillasaurus*
* *Lourinhanosaurus*
* *Lourinhasaurus*
* *Luanchuanraptor*
* "Luanpingosaurus" – *nomen nudum*; *Psittacosaurus*
* *Lucianosaurus* – subsequently found to be a non-dinosaurian archosauriform
* *Lucianovenator*
* *Lufengosaurus*
* *Lukousaurus* – possibly a crurotarsan
* *Luoyanggia*
* *Lurdusaurus*
* *Lusitanosaurus*
* *Lusotitan*
* *Lusovenator*
* *Lutungutali* – possibly non-dinosaurian
* *Lycorhinus*
* *Lythronax*

M

* *Macelognathus* – subsequently found to be a sphenosuchian crocodilian
* *Machairasaurus*
* *Machairoceratops*
* *Macrocollum*
* *Macrodontophion* – subsequently found to be a member of Lophotrochozoa
* *Macrogryphosaurus*
* *Macrophalangia* – junior synonym of *Chirostenotes*

[[null|link=https://en.m.wikipedia.org/wiki/File:Massospondylus\_reconstruction.png%7Calt=%7Cthumb%7CArtist's reconstruction of *Massospondylus*.]]

* "Macroscelosaurus" – *nomen nudum*; junior synonym of *Tanystropheus*
* *Macrurosaurus*
* "Madsenius" – *nomen nudum*, *Allosaurus*
* *Magnamanus*
* *Magnapaulia*
* *Magnirostris* – possible junior synonym of *Bagaceratops*
* *Magnosaurus*
* "Magulodon" – *nomen nudum*
* *Magyarosaurus*
* *Mahakala*
* *Mahuidacursor*
* *Maiasaura*
* *Maip*
* *Majungasaurus*
* *Majungatholus* – junior synonym of *Majungasaurus*
* *Malarguesaurus*
* *Malawisaurus*
* *Maleevosaurus* – junior synonym of *Tarbosaurus*
* *Maleevus*
* *Malefica*
* *Mamenchisaurus*
* *Mandschurosaurus*
* *Manidens*
* *Manospondylus* – synonym of *Tyrannosaurus*
* *Mansourasaurus*
* *Mantellisaurus*
* *Mantellodon* – junior synonym of *Mantellisaurus*
* "Maojandino" – *nomen nudum*
* *Mapusaurus*
* *Maraapunisaurus*
* *Marasuchus* – subsequently found to be a non-dinosaurian dinosauromorph
* "Marisaurus" – *nomen nudum*
* *Marmarospondylus*
* *Marshosaurus*
* *Martharaptor*
* *Masiakasaurus*
* *Massospondylus*

[[null|link=https://en.m.wikipedia.org/wiki/File:Microraptor\_Restoration.png%7Calt=%7Cthumb%7CArtist's reconstruction of *Microraptor* with colouration based on fossilised melanosomes.]]

* *Matheronodon*
* *Maxakalisaurus*
* *Mbiresaurus*
* *Medusaceratops*
* "Megacervixosaurus" – *nomen nudum*
* "*Megadactylus*" – preoccupied name, now known as *Anchisaurus*
* "Megadontosaurus" – *nomen nudum*; *Microvenator*
* *Megalosaurus*
* *Megapnosaurus* – possible junior synonym of *Coelophysis*
* *Megaraptor*
* *Mei*
* *Melanorosaurus*
* *Mendozasaurus*
* *Menefeeceratops*
* *Menucocelsior*
* *Meraxes*
* *Mercuriceratops*
* *Meroktenos*
* *Metriacanthosaurus*
* "Microcephale" – *nomen nudum*
* "*Microceratops*" – preoccupied name, now known as *Microceratus*
* *Microceratus*
* *Microcoelus*
* "Microdontosaurus" – *nomen nudum*
* *Microhadrosaurus*
* *Micropachycephalosaurus*
* *Microraptor*
* *Microvenator*
* *Mierasaurus*
* "Mifunesaurus" – *nomen nudum*
* *Migmanychion*
* *Minimocursor*
* *Minmi*
* *Minotaurasaurus*
* *Miragaia*
* *Mirischia*
* *Mnyamawamtuka*
* *Moabosaurus*
* *Mochlodon*
* "Mohammadisaurus" – *nomen nudum*; *Tornieria*

[[null|link=https://en.m.wikipedia.org/wiki/File:Muttaburrasaurus\_skel\_QM\_email.jpg%7Calt=%7Cthumb%7CCast of a *Muttaburrasaurus*skeleton.]]

* *Mojoceratops* – junior synonym of *Chasmosaurus*
* *Mongolosaurus*
* *Mongolostegus*
* *Monkonosaurus*
* *Monoclonius*
* *Monolophosaurus*
* "*Mononychus*" – preoccupied name, now known as *Mononykus*
* *Mononykus*
* *Montanoceratops*
* *Morelladon*
* *Morinosaurus*
* *Moros*
* *Morosaurus* – junior synonym of *Camarasaurus*
* *Morrosaurus*
* *Mosaiceratops*
* "Moshisaurus" – *nomen nudum*; possibly *Mamenchisaurus*
* "Mtapaiasaurus" – *nomen nudum*, synonym of *Giraffatitan*
* "Mtotosaurus" – *nomen nudum*; *Dicraeosaurus*
* *Murusraptor*
* *Mussaurus*
* *Muttaburrasaurus*
* *Muyelensaurus*
* *Mymoorapelta*

N

* *Naashoibitosaurus*
* *Nambalia*
* *Nankangia*
* *Nanningosaurus*
* *Nanosaurus*
* *Nanotyrannus* – junior synonym of *Tyrannosaurus*
* *Nanshiungosaurus*
* *Nanuqsaurus*
* *Nanyangosaurus*
* *Napaisaurus*
* *Narambuenatitan*
* *Narindasaurus*
* *Nasutoceratops*
* *Natovenator*
* "Natronasaurus" – invalid name, either *Alcovasaurus* or *Miragaia*

[[null|link=https://en.m.wikipedia.org/wiki/File:Neimongosaurus.jpg%7Calt=%7Cthumb%7CLife restoration of *Neimongosaurus*.]]

* *Navajoceratops*
* *Nebulasaurus*
* "*Nectosaurus*" – preoccupied name, now known as *Kritosaurus*
* *Nedcolbertia*
* *Nedoceratops* – possible junior synonym of *Triceratops*
* *Neimongosaurus*
* "*Nemegtia*" – preoccupied name, now known as *Nemegtomaia*
* *Nemegtomaia*
* *Nemegtonykus*
* *Nemegtosaurus*
* "*Neosaurus*" – preoccupied name; renamed *Parrosaurus*, which is now *Hypsibema*
* *Neosodon*
* *Neovenator*
* *Neuquenraptor*
* *Neuquensaurus*
* *Nevadadromeus*
* "Newtonsaurus" – *nomen nudum*, possibly *Zanclodon*
* "Ngexisaurus" – *nomen nudum*
* *Ngwevu*
* *Nhandumirim*
* *Nicksaurus* – *nomen manuscriptum*
* *Niebla*
* *Nigersaurus*
* *Ningyuansaurus*
* *Ninjatitan*
* *Niobrarasaurus*
* *Nipponosaurus*
* *Noasaurus*
* *Nodocephalosaurus*
* *Nodosaurus*
* *Nomingia* – possible junior synonym of *Elmisaurus*
* *Nopcsaspondylus*
* *Normanniasaurus*

[[null|link=https://en.m.wikipedia.org/wiki/File:Nemegtomaia\_barsboldi\_profile1.jpg%7Calt=%7Cthumb%7CRestored head of *Nemegtomaia*.]]

* *Notatesseraeraptor*
* *Nothronychus*
* *Notoceratops*
* *Notocolossus*
* *Notohypsilophodon*
* *Nqwebasaurus*
* "Nteregosaurus" – *nomen nudum*; *Janenschia*
* *Nullotitan*
* "Nurosaurus" – *nomen nudum*
* *Nuthetes*
* *Nyasasaurus* — possibly non-dinosaurian
* "Nyororosaurus" – *nomen nudum*; *Dicraeosaurus*

O

* *Oblitosaurus*
* *Oceanotitan*
* *Ohmdenosaurus*
* *Ojoceratops* – possible synonym of *Eotriceratops*
* *Ojoraptorsaurus*
* *Oksoko*
* *Oligosaurus* – possible synonym of *Mochlodon*
* *Olorotitan*
* *Omeisaurus*
* "*Omosaurus*" – preoccupied name, now known as *Dacentrurus*
* *Ondogurvel*
* *Onychosaurus* – junior synonym of *Zalmoxes*or *Rhabdodon*, or an ankylosaurian
* *Oohkotokia*
* *Opisthocoelicaudia*
* *Oplosaurus*
* "Orcomimus" – *nomen nudum*
* *Orinosaurus* – junior synonym (unneeded replacement name) of *Orosaurus*
* *Orkoraptor*
* *Ornatops*
* *Ornatotholus* – junior synonym of *Stegoceras*
* *Ornithodesmus*
* "Ornithoides" – *nomen nudum*; *Saurornithoides*
* *Ornitholestes*
* *Ornithomerus* – possible synonym of *Mochlodon*
* *Ornithomimoides*
* *Ornithomimus*
* *Ornithopsis*

[[null|link=https://en.m.wikipedia.org/wiki/File:Omeisaurus\_tianfuensis34.jpg%7Calt=%7Cthumb%7CArtist's reconstruction of *Omeisaurus*.]]

* *Ornithosuchus* – subsequently found to be a non-dinosaurian archosaur
* *Ornithotarsus* – junior synonym of *Hadrosaurus*
* *Orodromeus*
* *Orosaurus*
* *Orthogoniosaurus*
* *Orthomerus*
* *Oryctodromeus*
* "Oshanosaurus" – *nomen nudum*
* *Osmakasaurus*
* *Ostafrikasaurus*
* *Ostromia*
* *Othnielia* – junior synonym of *Nanosaurus*
* *Othnielosaurus* – junior synonym of *Nanosaurus*
* *Otogosaurus* — possibly a *nomen nudum*
* *Ouranosaurus*
* *Overoraptor*
* *Overosaurus*
* *Oviraptor*
* "Ovoraptor" – *nomen nudum*; *Velociraptor*
* *Owenodon*
* *Oxalaia* – possible junior synonym of *Spinosaurus*
* *Ozraptor*

P

* *Pachycephalosaurus*
* *Pachyrhinosaurus*
* *Pachysauriscus* – junior synonym of *Plateosaurus*
* *Pachysaurops* – junior synonym of *Plateosaurus*
* "*Pachysaurus*" – preoccupied name, now known as *Pachysauriscus*; junior synonym of *Plateosaurus*
* *Pachyspondylus* – junior synonym of *Massospondylus*
* *Pachysuchus*
* *Padillasaurus*
* "Pakisaurus" – *nomen nudum*
* *Palaeoctonus* – subsequently found to be a phytosaur
* *Palaeocursornis* – subsequently found to be an azhdarchoid pterosaur
* "Palaeolimnornis" – *nomen nudum*; *Palaeocursornis*, pterodactyloid pterosaur belonging to Azhdarchoidea
* *Palaeopteryx* – possibly a bird
* *Palaeosauriscus* – junior synonym of *Palaeosaurus*
* *Palaeosaurus* – subsequently found to be a non-dinosaurian reptile
* "*Palaeosaurus*" – preoccupied name, now known as *Sphenosaurus* and considered to be a non-dinosaurian procolophonid
* *Palaeoscincus*
* *Paleosaurus* – subsequently found to be a non-dinosaurian archosaur; junior synonym (unneeded replacement name) of *Palaeosaurus*
* *Paludititan*
* *Paluxysaurus* – junior synonym of *Sauroposeidon*
* *Pampadromaeus*

[[null|link=https://en.m.wikipedia.org/wiki/File:Pachycephalosaurus\_Reconstruction.jpg%7Calt=%7Cthumb%7CLife restoration of *Pachycephalosaurus*.]]

* *Pamparaptor*
* *Panamericansaurus*
* *Pandoravenator*
* *Panguraptor*
* *Panoplosaurus*
* *Panphagia*
* *Pantydraco* – possible synonym of *Thecodontosaurus*
* *Papiliovenator*
* "Paraiguanodon" – *nomen nudum*; *Bactrosaurus*
* *Paralitherizinosaurus*
* *Paralititan*
* *Paranthodon*
* *Pararhabdodon*
* *Parasaurolophus*
* *Paraxenisaurus*
* *Pareiasaurus* – subsequently found to be a pareiasaur
* *Pareisactus*
* *Parksosaurus*
* *Paronychodon*
* *Parrosaurus* – now known as *Hypsibema missouriensis*
* *Parvicursor*
* *Patagonykus*
* *Patagopelta*
* *Patagosaurus*
* *Patagotitan*
* *Pawpawsaurus*
* *Pectinodon*
* *Pedopenna*
* *Pegomastax*
* *Peishansaurus*
* *Pekinosaurus* – subsequently found to be a pseudosuchian; junior synonym of *Revueltosaurus*
* *Pelecanimimus*
* *Pellegrinisaurus*
* *Peloroplites*
* *Pelorosaurus*
* "*Peltosaurus*" – preoccupied name, now known as *Sauropelta*
* *Pendraig*
* *Penelopognathus*
* *Pentaceratops*

[[null|link=https://en.m.wikipedia.org/wiki/File:Plateosaurus\_BW.jpg%7Calt=%7Cthumb%7CArtist's restoration of *Plateosaurus*.]]

* *Perijasaurus*
* *Petrobrasaurus*
* *Phaedrolosaurus*
* *Philovenator*
* *Phuwiangosaurus*
* *Phuwiangvenator*
* *Phyllodon*
* *Piatnitzkysaurus*
* *Picrodon* – possibly non-dinosaurian
* *Pilmatueia*
* *Pinacosaurus*
* *Pisanosaurus* — possibly non-dinosaurian
* *Pitekunsaurus*
* *Piveteausaurus*
* *Planicoxa*
* *Plateosauravus*
* *Plateosaurus*
* *Platyceratops* – possible junior synonym of *Bagaceratops*
* *Platypelta*
* *Platytholus*
* *Plesiohadros*
* *Pleurocoelus* – possible junior synonym of *Astrodon*
* *Pleuropeltus* – junior synonym of *Struthiosaurus*
* *Pneumatoarthrus* – subsequently found to be a turtle
* *Pneumatoraptor*
* *Podokesaurus*
* *Poekilopleuron*
* *Polacanthoides* – chimera of *Hylaeosaurus*and *Polacanthus*
* *Polacanthus*
* *Polyodontosaurus*
* *Polyonax*
* *Ponerosteus* – subsequently found to be a non-dinosaurian archosaur
* *Poposaurus* – subsequently found to be a non-dinosaurian archosaur
* *Portellsaurus*
* *Postosuchus* – subsequently found to be a rauisuchian
* *Powellvenator*
* *Pradhania*
* *Prenocephale*
* *Prenoceratops*
* *Priconodon*
* *Priodontognathus*

[[null|link=https://en.m.wikipedia.org/wiki/File:Prosaurolophus\_maximus2.JPG%7Calt=%7Cthumb%7C*Prosaurolophus* skull.]]

* *Proa*
* *Probactrosaurus*
* *Probrachylophosaurus*
* *Proceratops* – junior synonym (unneeded replacement name) of *Ceratops*
* *Proceratosaurus*
* *Procerosaurus* – subsequently found to be a tanystropheid protorosaur, *Tanystropheus*
* "*Procerosaurus*" – preoccupied name, now known as *Ponerosteus*
* *Procheneosaurus* – junior synonym of *Lambeosaurus*
* *Procompsognathus*
* *Prodeinodon*
* "Proiguanodon" – *nomen nudum*; *Iguanodon*
* *Propanoplosaurus*
* *Proplanicoxa* – junior synonym of *Mantellisaurus*
* *Prosaurolophus*
* *Protarchaeopteryx*
* *Protathlitis*
* *Protecovasaurus* – subsequently found to be a non-dinosaurian archosauriform
* *Protiguanodon* – junior synonym of *Psittacosaurus*
* *Protoavis* – described as a bird, probably a chimera including theropod dinosaur bones
* *Protoceratops*
* *Protognathosaurus*
* "*Protognathus*" – preoccupied name, now known as *Protognathosaurus*
* *Protohadros*
* "*Protorosaurus*" – preoccupied name, now known as *Chasmosaurus*
* *Protorosaurus* – subsequently found to be a non-dinosaurian reptile
* "Proyandusaurus" – *nomen nudum*; *Hexinlusaurus*.
* *Pseudolagosuchus* – possibly non-dinosaurian; a junior synonym of *Lewisuchus*
* *Psittacosaurus*
* *Pteropelyx*
* *Pterospondylus*
* *Puertasaurus*
* *Pukyongosaurus*
* *Pulanesaura*
* *Punatitan*
* *Pycnonemosaurus*
* *Pyroraptor*

Q

* *Qantassaurus*
* *Qianlong*

[[null|link=https://en.m.wikipedia.org/wiki/File:Qiupalong\_Restoration.png%7Calt=%7Cthumb%7CArtist's reconstruction of *Qiupalong*.]]

* *Qianzhousaurus*
* *Qiaowanlong*
* *Qijianglong*
* *Qingxiusaurus*
* *Qinlingosaurus*
* *Qiupalong*
* *Qiupanykus*
* *Quaesitosaurus*
* *Quetecsaurus*
* *Quilmesaurus*

R

* *Rachitrema* – subsequently found to be a chimera primarily based on ichthyosaurfossils
* *Rahiolisaurus*
* "*Rahona*" – preoccupied name, now known as *Rahonavis*
* *Rahonavis* – possibly a bird
* *Rajasaurus*
* *Rapator*
* *Rapetosaurus*
* *Raptorex* – possible junior synonym of *Tarbosaurus*
* *Ratchasimasaurus*
* *Rativates*
* *Rayososaurus*
* *Razanandrongobe* – subsequently found to be a crocodylomorph
* *Rebbachisaurus*
* *Regaliceratops*
* *Regnosaurus*
* *Revueltosaurus* – subsequently found to be a pseudosuchian
* *Rhabdodon*
* *Rhadinosaurus* – may be non-dinosaurian, possibly crocodilian
* *Rhinorex* – possible synonym of *Gryposaurus*
* *Rhodanosaurus* – junior synonym of *Struthiosaurus*
* *Rhoetosaurus*
* *Rhomaleopakhus*
* *Rhopalodon* – subsequently found to be a synapsid
* *Riabininohadros*
* *Richardoestesia*

[[null|link=https://en.m.wikipedia.org/wiki/File:Ruyangosaurus\_skeleton.jpg%7Calt=%7Cthumb%7C*Ruyangosaurus* skeleton.]]

* "*Rileya*" – preoccupied name, now known as *Rileyasuchus*
* *Rileyasuchus* – subsequently found to be a phytosaur
* *Rinchenia*
* *Rinconsaurus*
* *Rioarribasaurus* – junior synonym of *Coelophysis*
* "Riodevasaurus" – *nomen nudum*; *Turiasaurus*
* *Riojasaurus*
* *Riojasuchus* – subsequently found to be a non-dinosaurian archosaur
* *Riparovenator*
* *Rocasaurus*
* "Roccosaurus" – *nomen nudum*; *Melanorosaurus*
* "Ronaldoraptor" – *nomen nudum*
* *Rubeosaurus* – junior synonym of *Styracosaurus*
* *Ruehleia*
* *Rugocaudia*
* *Rugops*
* *Ruixinia*
* *Rukwatitan*
* *Ruyangosaurus*

S

* *Sacisaurus* – possibly non-dinosaurian
* *Sahaliyania*
* *Saichania*
* "Saldamosaurus" – *nomen nudum*
* "Salimosaurus" – *nomen nudum*, synonym of *Giraffatitan*
* *Saltasaurus*
* *Saltopus* – possibly non-dinosaurian
* "Saltriosaurus" – *nomen nudum*
* *Saltriovenator*
* "Sanchusaurus" – *nomen nudum*, possible *Gallimimus*
* "Sangonghesaurus" – *nomen nudum*, *Tianchisaurus*
* *Sanjuansaurus*
* *Sanpasaurus*
* *Santanaraptor*
* *Sanxiasaurus*
* *Sarahsaurus*
* *Saraikimasoom* – *nomen manuscriptum*
* *Sarcolestes*
* *Sarcosaurus*
* *Sarmientosaurus*
* *Saturnalia*
* "Sauraechinodon" – *nomen nudum*; *Echinodon*

[[null|link=https://en.m.wikipedia.org/wiki/File:Scelidosaurus\_harrisonii.png%7Calt=%7Cthumb%7CArtist's restoration of *Scelidosaurus*.]]

* "Sauraechmodon" – *nomen nudum*; *Echinodon*
* "Saurechinodon" – *nomen nudum*; *Echinodon*
* *Saurolophus*
* *Sauroniops*
* *Sauropelta*
* *Saurophaganax*
* "*Saurophagus*" – preoccupied name, now known as *Saurophaganax*
* *Sauroplites*
* *Sauroposeidon*
* *Saurornithoides*
* *Saurornitholestes*
* *Savannasaurus*
* *Scansoriopteryx*
* *Scaphonyx* – subsequently found to be a rhynchosaur, *Hyperodapedon*
* *Scelidosaurus*
* *Schleitheimia*
* *Scipionyx*
* *Sciurumimus*
* *Scleromochlus* – subsequently found to be a non-dinosaurian avemetatarsalian
* *Scolosaurus*
* *Scutellosaurus*
* *Secernosaurus*
* *Sefapanosaurus*
* *Segisaurus*
* *Segnosaurus*
* *Seismosaurus* – junior synonym of *Diplodocus*
* *Seitaad*
* *Sektensaurus*
* "Selimanosaurus" – *nomen nudum*; *Dicraeosaurus*
* *Sellacoxa* – junior synonym of *Barilium*
* *Sellosaurus* – junior synonym of *Plateosaurus*
* *Serendipaceratops*
* *Serikornis*
* *Shamosaurus*
* *Shanag*
* *Shanshanosaurus* – junior synonym of *Tarbosaurus*
* *Shantungosaurus*
* *Shanxia*
* *Shanyangosaurus*
* *Shaochilong*

[[null|link=https://en.m.wikipedia.org/wiki/File:Sinosaurus\_triassicus.JPG%7Calt=%7Cthumb%7C*Sinosaurus* skeleton, Museo delle Scienze of Trento, Italy.]]

* *Shenzhousaurus*
* *Shidaisaurus*
* *Shingopana*
* *Shishugounykus*
* *Shixinggia*
* *Shri*
* *Shuangbaisaurus* – possible synonym of *Sinosaurus*
* *Shuangmiaosaurus*
* *Shunosaurus*
* *Shuvosaurus* – subsequently found to be a rauisuchian
* *Shuvuuia*
* *Siamodon*
* "Siamodracon" – *nomen nudum*
* *Siamosaurus*
* *Siamotyrannus*
* *Siamraptor*
* *Siats*
* "Sibirosaurus" – *nomen nudum*, now known as *Sibirotitan*
* *Sibirotitan*
* *Sidersaura*
* "Sidormimus" – *nomen nudum*
* *Sierraceratops*
* *Sigilmassasaurus* – possible junior synonym of *Spinosaurus*
* *Silesaurus* – possibly non-dinosaurian
* *Siluosaurus*
* *Silutitan*
* *Silvisaurus*
* *Similicaudipteryx*
* *Sinankylosaurus*
* *Sinocalliopteryx*
* *Sinocephale*
* *Sinoceratops*
* *Sinocoelurus*
* "Sinopelta" – *nomen nudum*; synonym of *Sinopeltosaurus*
* "Sinopeltosaurus" – *nomen nudum*
* *Sinopliosaurus* – a pliosaur; one species, *"S." fusuiensis*, is actually a dinosaur that may be synonymous with *Siamosaurus*
* *Sinornithoides*

[[null|link=https://en.m.wikipedia.org/wiki/File:Skorpiovenator\_skull.jpg%7Calt=%7Cthumb%7C*Skorpiovenator* skull.]]

* *Sinornithomimus*
* *Sinornithosaurus*
* *Sinosauropteryx*
* *Sinosaurus*
* *Sinotyrannus*
* *Sinovenator*
* *Sinraptor*
* *Sinusonasus*
* *Sirindhorna*
* *Skorpiovenator*
* "*Smilodon*" – preoccupied name, now known as *Zanclodon*
* *Smitanosaurus*
* *Smok* — possibly non-dinosaurian
* *Sonidosaurus*
* *Sonorasaurus*
* *Soriatitan*
* *Soumyasaurus* – possibly non-dinosaurian
* *Spectrovenator*
* *Sphaerotholus*
* *Sphenosaurus* – subsequently found to be a non-dinosaurian reptile
* *Sphenospondylus* – junior synonym of *Mantellisaurus*
* *Spiclypeus*
* *Spicomellus*
* *Spinophorosaurus*
* *Spinops*
* *Spinosaurus*
* *Spinostropheus*
* *Spinosuchus* – subsequently found to be a non-dinosaurian reptile
* *Spondylosoma* – subsequently found to be an aphanosaur
* *Squalodon* – subsequently found to be a cetacean
* *Staurikosaurus*
* *Stegoceras*
* *Stegopelta*
* *Stegosaurides*
* *Stegosaurus*
* *Stegouros*
* *Stellasaurus*
* *Stenonychosaurus*

[[null|link=https://en.m.wikipedia.org/wiki/File:Stegosaurus\_stenops\_sophie\_wiki\_martyniuk.png%7Calt=%7Cthumb%7CArtist's restoration of *Stegosaurus*.]]

* *Stenopelix*
* *Stenotholus* – junior synonym of *Stygimoloch*, which is a possible junior synonym of *Pachycephalosaurus*
* *Stephanosaurus*
* "*Stereocephalus*" – preoccupied name, now known as *Euoplocephalus*
* *Sterrholophus* – junior synonym of *Triceratops*
* *Stokesosaurus*
* *Stormbergia* – junior synonym of *Lesothosaurus*
* *Strenusaurus* – junior synonym of *Riojasaurus*
* *Streptospondylus*
* *Struthiomimus*
* *Struthiosaurus*
* *Stygimoloch* – junior synonym of *Pachycephalosaurus*
* *Stygivenator* – junior synonym of *Tyrannosaurus*
* *Styracosaurus*
* *Succinodon* – subsequently found to be fossilized mollusc borings
* *Suchomimus*
* *Suchoprion* – subsequently found to be a phytosaur
* *Suchosaurus* – possible synonym of *Baryonyx*
* "Sugiyamasaurus" – *nomen nudum*
* "Sulaimanisaurus" – *nomen nudum*
* *Supersaurus*
* *Suskityrannus*
* *Suuwassea*
* *Suzhousaurus*
* *Symphyrophus* – junior synonym of *Camptosaurus*
* *Syngonosaurus*
* "*Syntarsus*" – preoccupied name, sometimes assigned to *Coelophysis* or *Megapnosaurus*
* *Syrmosaurus* – junior synonym of *Pinacosaurus*
* *Szechuanosaurus*

T

* *Tachiraptor*

[[null|link=https://en.m.wikipedia.org/wiki/File:Thecondontosaurus\_life\_restoration\_2018.jpg%7Calt=%7Cthumb%7CArtist's restoration of *Thecodontosaurus*.]]

* *Talarurus*
* *Talenkauen*
* *Talos*
* *Tamarro*
* *Tambatitanis*
* *Tangvayosaurus*
* *Tanius*
* *Tanycolagreus*
* *Tanystropheus* – subsequently found to be a protorosaur
* *Tanystrosuchus*
* *Taohelong*
* *Tapinocephalus* – subsequently found to be a therapsid
* *Tapuiasaurus*
* *Tarascosaurus*
* *Tarbosaurus*
* *Tarchia*
* *Tastavinsaurus*
* *Tatankacephalus*
* *Tatankaceratops* – probable junior synonym of *Triceratops*
* *Tataouinea*
* *Tatisaurus*
* *Taurovenator*
* *Taveirosaurus*
* *Tawa*
* *Tawasaurus* – junior synonym of *Lufengosaurus*
* *Tazoudasaurus*
* *Technosaurus* – possibly non-dinosaurian
* *Tecovasaurus* – subsequently found to be a non-dinosaurian archosauriform
* *Tehuelchesaurus*
* "Teihivenator" – *nomen nudum*
* *Teinurosaurus*
* *Teleocrater* – subsequently found to be a basal avemetatarsalian
* *Telmatosaurus*
* "Tenantosaurus" – *nomen nudum*; *Tenontosaurus*
* "Tenchisaurus" – *nomen nudum*; an unpublished museum name for *Tianchisaurus*
* *Tendaguria*
* *Tengrisaurus*
* *Tenontosaurus*
* *Teratophoneus*
* *Teratosaurus* – subsequently found to be a non-dinosaurian archosaur
* *Termatosaurus* – subsequently found to be a phytosaur
* *Terminocavus*

[[null|link=https://en.m.wikipedia.org/wiki/File:Coast\_watch\_(1979)\_(20472080340).jpg%7Calt=%7Cthumb%7C*Thescelosaurus* fossil.]]

* *Tethyshadros*
* *Tetragonosaurus* – junior synonym of *Lambeosaurus*
* *Texacephale*
* *Texasetes*
* *Teyuwasu* – possibly junior synonym of *Staurikosaurus*
* *Thanatotheristes*
* *Thanos*
* *Tharosaurus*
* *Thecocoelurus*
* *Thecodontosaurus*
* *Thecospondylus*
* *Theiophytalia*
* *Therizinosaurus*
* *Therosaurus* – a synonym of *Iguanodon*
* *Thescelosaurus*
* *Thespesius*
* "Thotobolosaurus" – *nomen nudum*; *Kholumolumo*
* *Tianchiasaurus* – alternate spelling of *Tianchisaurus*
* *Tianchisaurus*
* "Tianchungosaurus" – *nomen nudum*; *Dianchungosaurus* (crocodilian)
* *Tianyulong*
* *Tianyuraptor*
* *Tianzhenosaurus*
* *Tichosteus*
* *Tienshanosaurus*
* *Timimus*
* *Timurlengia*
* *Titanoceratops*
* *Titanosaurus*
* "*Titanosaurus*" – preoccupied name, now known as *Atlantosaurus*
* *Tlatolophus*
* *Tochisaurus*
* "*Tomodon*" – preoccupied name, now known as *Diplotomodon*
* *Tonganosaurus*
* *Tongtianlong*
* "Tonouchisaurus" – *nomen nudum*
* *Torilion* – junior synonym of *Barilium*
* *Tornieria*
* *Torosaurus*

[[null|link=https://en.m.wikipedia.org/wiki/File:Triceratops\_Specimen\_at\_the\_Houston\_Museum\_of\_Natural\_Science.JPG%7Calt=%7Cthumb%7CSkeleton of *Triceratops* at the Houston Museum of Natural Science.]]

* *Torvosaurus*
* *Tototlmimus*
* *Trachodon*
* *Tralkasaurus*
* *Transylvanosaurus*
* *Tratayenia*
* *Traukutitan*
* *Trialestes* – subsequently found to be a basal crocodylomorph
* "*Triassolestes*" – preoccupied name, now known as *Trialestes*
* *Tribelesodon* – junior synonym of *Tanystropheus*, a protorosaur
* *Triceratops*
* *Trierarchuncus*
* *Trigonosaurus*
* *Trimucrodon*
* *Trinisaura*
* *Triunfosaurus*
* *Troodon*
* *Tsaagan*
* *Tsagantegia*
* *Tsintaosaurus*
* *Tuebingosaurus*
* *Tugulusaurus*
* *Tuojiangosaurus*
* *Turanoceratops*
* *Turiasaurus*
* *Tylocephale*
* *Tylosteus* – synonym of *Pachycephalosaurus*
* *Tyrannomimus*
* *Tyrannosaurus*
* *Tyrannotitan*

U

* *Uberabatitan*
* "Ubirajara" – *nomen nudum*
* *Udanoceratops*
* *Ugrosaurus* – junior synonym of *Triceratops*
* *Ugrunaaluk* – junior synonym of *Edmontosaurus*
* *Uintasaurus* – junior synonym of *Camarasaurus*
* *Ultrasauros* – junior synonym of *Supersaurus*
* "*Ultrasaurus*" – preoccupied name, renamed *Ultrasauros* which is now a junior synonym of *Supersaurus*
* *Ultrasaurus*
* *Ulughbegsaurus*
* "Umarsaurus" – *nomen nudum*; *Barsboldia*
* *Unaysaurus*
* *Unenlagia*
* *Unescoceratops*
* "Unicerosaurus" – *nomen nudum*, subsequently found to be a fish
* *Unquillosaurus*
* *Urbacodon*
* *Utahceratops*
* *Utahraptor*
* *Uteodon*

V

* *Vagaceratops*
* *Vahiny*
* *Valdoraptor* – possible synonym of *Thecocoelurus*
* *Valdosaurus*
* *Vallibonavenatrix*
* *Variraptor*
* *Vayuraptor*
* *Vectaerovenator*
* *Vectensia* – junior synonym of *Polacanthus*or *Hylaeosaurus*
* *Vectidromeus*
* *Vectipelta*
* *Vectiraptor*

[[null|link=https://en.m.wikipedia.org/wiki/File:Velociraptor\_Restoration.png%7Calt=%7Cthumb%7CLife restoration of *Velociraptor*.]]

* *Vectisaurus* – junior synonym of *Mantellisaurus*
* *Velafrons*
* *Velocipes*
* *Velociraptor*
* *Velocisaurus*
* *Venaticosuchus* – subsequently found to be a non-dinosaurian archosaur
* *Venenosaurus*
* *Vespersaurus*
* *Veterupristisaurus*
* *Viavenator*
* "Vitakridrinda" – *nomen nudum*
* "Vitakrisaurus" – *nomen nudum*
* *Volgatitan*
* *Volkheimeria*
* *Vouivria*
* *Vulcanodon*

W

* *Wadhurstia* – junior synonym of *Hypselospinus*
* *Wakinosaurus*
* *Walgettosuchus* – possible synonym of *Rapator*
* "*Walkeria*" – preoccupied name, now known as *Alwalkeria*
* "Walkersaurus" – *nomen nudum*; *Duriavenator*
* *Wamweracaudia*
* "Wangonisaurus" – *nomen nudum*, synonym of *Giraffatitan*
* *Wannanosaurus*
* *Weewarrasaurus*

[[null|link=https://en.m.wikipedia.org/wiki/File:%D0%9D%D0%BE%D0%B2%D0%B0%D1%8F\_%D1%80%D0%B5%D0%BA%D0%BE%D0%BD%D1%81%D1%82%D1%80%D1%83%D0%BA%D1%86%D0%B8%D1%8F\_%D0%9C%D0%BE%D0%BD%D1%81%D1%82%D1%80%D0%B0\_%D0%B8%D0%B7\_%D0%9C%D0%B8%D0%BD%D0%B4%D0%B5%D0%BD%D0%B0.jpg%7Calt=%7Cthumb%7CArtist's restoration of *Wiehenvenator*.]]

* *Wellnhoferia* – subsequently found to be a bird, possible junior synonym of *Archaeopteryx*
* *Wendiceratops*
* *Wiehenvenator*
* *Willinakaqe*
* *Wintonotitan*
* *Wuerhosaurus*
* *Wulagasaurus*
* *Wulatelong*
* *Wulong*
* *Wyleyia* – subsequently found to be a bird
* "Wyomingraptor" – *nomen nudum*, synonym of *Allosaurus*

X

* *Xenoceratops*
* *Xenoposeidon*
* *Xenotarsosaurus*
* *Xianshanosaurus*
* *Xiaosaurus*

[[null|link=https://en.m.wikipedia.org/wiki/File:Xiongguanlong\_NT.jpg%7Calt=%7Cthumb%7CArtist's reconstruction of *Xiongguanlong*.]]

* *Xiaotingia*
* *Xingtianosaurus*
* *Xingxiulong*
* *Xinjiangovenator*
* *Xinjiangtitan*
* *Xiongguanlong*
* *Xixianykus*
* *Xixiasaurus*
* *Xixiposaurus*
* *Xiyunykus*
* *Xuanhanosaurus*
* *Xuanhuaceratops*
* "Xuanhuasaurus" – *nomen nudum*; *Xuanhuaceratops*
* *Xunmenglong*
* *Xuwulong*

Y

* *Yaleosaurus* – junior synonym of *Anchisaurus*
* *Yamaceratops*
* *Yamanasaurus*
* *Yamatosaurus*
* *Yandusaurus*
* *Yangchuanosaurus*
* *Yaverlandia*
* *Yehuecauhceratops*
* "Yezosaurus" – *nomen nudum*; subsequently found to be a junior synonym of the mosasaur *Taniwhasaurus*
* *Yi*
* "Yibinosaurus" – *nomen nudum*

[[null|link=https://en.m.wikipedia.org/wiki/File:Yangchuanosaurus\_NT\_small.jpg%7Calt=%7Cthumb%7CArtist's restoration of *Yangchuanosaurus*.]]

* *Yimenosaurus*
* *Yingshanosaurus*
* *Yinlong*
* *Yixianosaurus*
* *Yizhousaurus*
* *Yongjinglong*
* *Ypupiara*
* "Yuanmouraptor" – *nomen nudum*
* *Yuanmousaurus*
* *Yueosaurus*
* *Yulong*
* *Yunganglong*
* *Yunmenglong*
* *Yunnanosaurus*
* "Yunxianosaurus" – *nomen nudum*
* *Yunyangosaurus*
* *Yurgovuchia*
* *Yutyrannus*
* *Yuxisaurus*
* *Yuzhoulong*

Z

* *Zalmoxes*
* *Zanabazar*
* *Zanclodon* – subsequently found to be non-dinosaurian
* *Zapalasaurus*
* *Zapsalis*
* *Zaraapelta*
* *Zatomus* – subsequently found to be a non-dinosaurian archosaur
* *Zby*
* *Zephyrosaurus*
* *Zhanghenglong*
* *Zhejiangosaurus*
* *Zhenyuanlong*

[[null|link=https://en.m.wikipedia.org/wiki/File:Zby\_NT\_small.jpg%7Calt=%7Cthumb%7CLife restoration of *Zby*.]]

* *Zhongjianosaurus*
* *Zhongornis* – subsequently found to be a bird
* *Zhongyuansaurus* – possible junior synonym of *Gobisaurus*
* *Zhuchengceratops*
* *Zhuchengosaurus* – junior synonym of *Shantungosaurus*
* *Zhuchengtitan*
* *Zhuchengtyrannus*
* *Ziapelta*
* *Zigongosaurus*
* *Zizhongosaurus*
* *Zuniceratops*
* "Zunityrannus" – *nomen nudum*, *Suskityrannus*
* *Zuolong*
* *Zuoyunlong*
* *Zupaysaurus*
* *Zuul*