DINOSAUR GENERA

since: 28-October-1995 / last updated: 23-December-2025
Thank you to DinoGeorge Olshevsky (1946-2021)
for the original listing on 27-October-1995
and also to all the other contributors from the Dinosaur Mailing Group.
printable list: d-genera.pdf

Genera count = 1879 (including 114 not presently considered to be dinosaurian)
[nomen ex dissertatione] = name appears in a dissertation
[nomen manuscriptum] = unpublished name in a manuscript for publication
[nomen dubium] = name usually based on more than one type specimen
[nomen nudum] = name lacking a description and/or a type specimen
[nomen oblitum] = name forgotten for at least 50 years
[nomen rejectum] = name rejected by the ICZN
non = incorrect reference by the first to a name by the second author
vide = name attributed to the first author by the second author
/ = name preoccupied by the second author
JOS → Junior Objective Synonym of the indicated genus
JSS → Junior Subjective Synonym of the indicated genus
PSS → Possible Subjective Synonym of the indicated genus
SSS → Suppressed Senior Synonym of the indicated genus

Aardonyx: A.M. Yates, M.F. Bonnan, J. Neveling, A. Chinsamy & M.G. Blackbeard, 2009
"Abdallahsaurus": G. Maier, 2003 [nomen nudum → Giraffatitan]
Abdarainurus: A.O. Averianov & A.V. Lopatin, 2020
Abditosaurus: B. Vila, A. Sellés, M. Moreno-Azanza, N.L. Razzolini, A. Gil-Delgado, J.I. Canudo & À. Galobart, 2022
Abelisaurus: J.F. Bonaparte & F.E. Novas, 1985
Abrictosaurus: J.A. Hopson, 1975
Abrosaurus: Ouyang H, 1989
Abydosaurus: D. Chure, B.B. Britt, J.A. Whitlock & J.A. Wilson, 2010
Acantholipan: H.E. Rivera-Sylva, E. Frey, W. Stinnesbeck, G. Carbot-Chanona, I.E. Sanchez-Uribe & J.R. Guzmán-Gutiérrez, 2018
Acanthopholis: T.H. Huxley, 1867 [nomen dubium]
Achelousaurus: S.D. Sampson, 1995
Acheroraptor: D.C. Evans, D.W. Larson & P.J. Currie, 2013
Achillesaurus: A.G. Martinelli & E.I. Vera, 2007
Achillobator: A. Perle, M.A. Norell & J.M. Clark, 1999
Acracanthus: W.R. Langston, 1947 vide N.J. Czaplewski, R.L. Cifelli & W.R. Langston, 1994 [nomen ex dissertatione → Acrocanthosaurus]
Acristavus: T.A. Gates, J.R. Horner, R.R. Hanna & C.R. Nelson, 2011
Acrocanthosaurus: J.W. Stovall & W.R. Langston, 1950
Acrotholus: D.C. Evans, R.K. Schott, D.W. Larson, C.M. Brown & M.J. Ryan, 2013
Adamantisaurus: R.A. Santucci & Bertini, 2006
Adasaurus: R. Barsbold, 1983
Adelolophus: T.A. Gates, Z.A. Jinnah, C. Levitt & M.A. Getty, 2014
Adeopapposaurus: R.N. Martínez, 2009
Adratiklit: S.C.R. Maidment, T.J. Raven, D. Ouarhache & P.M. Barrett, 2019
Adynomosaurus: A. Prieto-Márquez, V. Fondevilla, A.G. Sellés, J.R. Wagner & À. Galobart, 2018
Aegyptosaurus: E. Stromer, 1932
Aeolosaurus: J.E. Powell, 1987

Aeolosaurus maximus renamed Arrudatitan maximus, 2021.

Aepisaurus: P. Gervais, 1852 [nomen dubium]
Aepyornithomimus: Chinzorig T, Y. Kobayashi, Tsogtbaatar K, P.J. Currie, M. Watabe & R. Barsbold, 2017
Aerosteon: P.C. Sereno, R.N. Martínez, J.A. Wilson, D.J. Varricchio, O.A. Alcober & H.C.E. Larsson, 2008
Aetonyx: R. Broom, 1911 [JSS → Massospondylus]
Afromimus: P.C. Sereno, 2017
Afrovenator: P.C. Sereno, J.A. Wilson, H.C.E. Larsson, D.B. Dutheil & H-D Sues, 1994
Agathaumas: E.D. Cope, 1872 [nomen dubium; PSS → Nedoceratops, Torosaurus or Triceratops]
Agilisaurus: Peng G, 1990
Agnosphitys: Fraser, Padian, Walkden & Davis, 2002
Agrosaurus: H.G. Seeley, 1891 [JSS → Thecodontosaurus]
Agujaceratops: S.G. Lucas, R.M. Sullivan & A.P. Hunt, 2006
Agustinia: J.F. Bonaparte, 1999
Ahshislepelta: M.E. Burns & R.M. Sullivan, 2011
Ahshislesaurus: S.G. Dalman, S.E. Jasinski, D.E. Malinzak, S.G. Lucas, M. Kundrát & A.R. Fiorillo, 2025
Ahvaytum: D.M. Lovelace, A.M. Kufner, A.J. Fitch, K.C. Rogers, M. Schmitz, D.M. Schwartz, A. LeClair-Diaz, L. St.Clair, J. Mann & R. Teran, 2025
Airakoraptor: A. Perle, M.A. Norell & J.M. Clark, 1999 [nomen nudum]
Ajancingenia: J. Easter, 2013
Ajkaceratops: Ösi A, R.J. Butler & D.B. Weishampel, 2010
Ajnabia: N.R. Longrich, X.P. Suberbiola, R.A. Pyron & N-E Jalil, 2020
Akainacephalus: J.P. Wiersma & R.B. Irmis, 2018
Alamosaurus: C.W. Gilmore, 1922
Alamotyrannus: S.G. Dalman & S.G. Lucas, 2013 [nomen nudum; PSS → Tyrannosaurus]
Alashansaurus: D. Chure, 2001 [nomen ex dissertatione → Shaochilong]
Alaskacephale: R.M. Sullivan, 2006
Albalophosaurus: T. Ohashi & P.M. Barrett, 2009
Albertaceratops: M.J. Ryan, 2007
Albertadromeus: C.M. Brown, D.C. Evans, M.J. Ryan & A.P. Russell, 2013
Albertavenator: D.C. Evans, T.M. Cullen, D.W. Larson & A. Rego, 2017
Albertonykus: N.R. Longrich & P.J. Currie, 2008
Albertosaurus: H.F. Osborn, 1905
Albinykus: S.J. Nesbitt, J.A. Clarke, A.H. Turner & M.A. Norell, 2011
Alcmonavis: O.W.M. Rauhut, H. Tischlinger & C. Foth, 2019 [possible bird]
Alcovasaurus: P.M. Galton & K. Carpenter, 2016
Alectrosaurus: C.W. Gilmore, 1933
Aletopelta: Ford & J.I. Kirkland, 2001
Algoasaurus: R. Broom, 1904 [nomen dubium]
Alioramus: S.M. Kurzanov, 1976
Aliwalia: P.M. Galton, 1985 [JSS → Eucnemesaurus]
Allosaurus: O.C. Marsh, 1877
Almas: Pei R, M.A. Norell, D.E. Barta, G.S. Bever, M. Pittman, & Xu X, 2017
Alnashetri: P.J. Makovicky, S. Apesteguía & F.A. Gianechini, 2012
Alocodon: Thulborn, 1973
Alpkarakush: O.W.M. Rauhut, A.A. Bakirov, O. Wings, A.E. Fernandes & T.R. Hübner, 2024
Altirhinus: D.B. Norman, 1998
Altispinax: F. von Huene, 1923 [nomen dubium; PSS → Becklespinax]
Alvarezsaurus: J.F. Bonaparte, 1991
Alwalkeria: S. Chatterjee & Creisler, 1994
Alxasaurus: D.A. Russell & Dong Z-M, 1994 (not 1993)
Amanzia: D. Schwarz, P.D. Mannion, O. Wings & C.A. Meyer, 2020
Amargasaurus: L. Salgado & J.F. Bonaparte, 1991
Amargastegos: R.E. Ulansky, 2014
Amargatitanis: S. Apesteguía, 2007
Amazonsaurus: I. de Souza Carvalho, L.S. Avilla & L. Salgado, 2003
Ambopteryx: Wang M, J.K. O'Connor, Xu X. & Zhou Z, 2019
Ammosaurus: O.C. Marsh, 1891
Ampelognathus: R.S. Tykoski, D.L. Contreras & C. Noto, 2023
Ampelosaurus: J. LeLoeuff, 1995
Amphicoelias: E.D. Cope, 1877 [nomen dubium]

Amphicoelias fragillimus renamed Maraapunisaurus fragillimus, 2018.

Amphicoelicaudia: Cheng Z, etal, 1994 vide Li K, 1998 [nomen nudum → Huabeisaurus]
Amphisaurus: O.C. Marsh, 1877 / Barkas, 1870 → Anchisaurus
Amtocephale: M. Watabe, Tsogtbaatar K. & R.M. Sullivan, 2011
Amtosaurus: S.M. Kurzanov & T.A. Tumanova, 1978 [nomen dubium]
Amurosaurus: Y.L. Bolotsky & S.M. Kurzanov, 1991
Amygdalodon: Cabrera, 1947 [nomen dubium]
Anabisetia: R.A. Coria & J.O. Calvo, 2002
Analong: Ren X-X, T. Sekiya, Wang T, Yang Z-W & You H-L, 2020
Anasazisaurus: A.P. Hunt & S.G. Lucas, 1993 [PSS → Gryposaurus or Kritosaurus]
Anatosaurus: Lull & Wright, 1942 [JSS → Edmontosaurus]

Species of Anatosaurus, except Anatosaurus copei,
were assimilated into Edmontosaurus, 1979.
Anatosaurus copei renamed Anatotitan copei, 1990.

Anatotitan: M.K. Brett-Surman vide R.E. Chapman & M.K. Brett-Surman, 1990 [PSS → Edmontosaurus]
Anchiceratops: B. Brown, 1914
Anchiornis: Xu X, Zhao Q, M.A. Norell, C. Sullivan, Hone, G.M. Erickson, Wang X-L, Han F. & Guo Y, 2009 [possible bird]
Anchisaurus: O.C. Marsh, 1885
Andesaurus: J.O. Calvo & J.F. Bonaparte, 1991
Andhrasaurus: R.E. Ulansky, 2014
Angaturama: A.W.A. Kellner & D.A. Campos, 1996 [JSS → Irritator]
Angloposeidon: D. Naish, 2010 [nomen nudum; in Tetrapod Zoology Book One]
Angolatitan: O. Mateus, L.L. Jacobs, A.S. Schulp, M.J. Polcyn, T.S. Tavares, A.B. Neto, M.L. Morais & M.T. Antunes, 2011
Angulomastacator: J.R. Wagner & T.M. Lehman, 2009
Anhuilong: Ren X-X, Huang J-D & You H-L, 2018
Aniksosaurus: R.D. Martínez & F.E. Novas, 2006
Animantarx: K. Carpenter, J.I. Kirkland, Burge & J. Bird, 1999
Ankylosaurus: B. Brown, 1908
Anodontosaurus: C.M. Sternberg, 1929
Anomalipes (genus also refers to a specie for a fly, wasps & crab): Yu Y, Wang K, Chen S, C. Sullivan, Wang S, Wang P. & Xu X, 2018
Anoplosaurus: H.G. Seeley, 1879
Anserimimus: R. Barsbold, 1988
Antarctopelta: L. Salgado & Z. Gasparini, 2006 [nomen dubium]
Antarctosaurus: F. von Huene, 1929
Anteavis: R.N. Martínez, C.E. Colombi, M.D. Ezcurra, D.O. Abelín, I. Cerda & O.A. Alcober, 2025
Antetonitrus: A.M. Yates & Kitching, 2003
Antrodemus: J. Leidy, 1870 [nomen dubium; PSS → Allosaurus]
Anzu: M.C. Lamanna, H-D Sues, E.R. Schachner & T.R. Lyson, 2014
Aoniraptor: M.J. Motta, A.M. Aranciaga Rolando, S. Rozadilla, F.L. Agnolín, N.R. Chimento, F. Brissón-Eglí & F.E. Novas, 2016
Aorun: J.N. Choiniere, J.M. Clark, C.A. Forster, M.A. Norell, D.A. Eberth, G.M. Erickson, Chu H-J & Xu X, 2013
Apatodon: O.C. Marsh, 1877 [nomen dubium; PSS → Allosaurus]
Apatoraptor: G.F. Funston & P.J. Currie, 2016
Apatosaurus: O.C. Marsh, 1877
Appalachiosaurus: T.D. Carr, T.E. Williamson & Schwimmer, 2005
Aquilarhinus: A. Prieto-Márquez, J.R. Wagner & T. Lehman, 2019
Aquilops: A,A. Farke, W.D. Maxwell, R.L. Cifelli & M.J. Wedel, 2014
Arackar: D. Rubilar-Rogers, A.O. Vargas, B. González Riga, S. Soto-Acuña, J. Alarcón-Muñoz, J. Iriarte-Díaz, C. Arévalo & C.S. Gutstein, 2021
Aragosaurus: J.L. Sanz, Buscalioni, Casanovas-Cladellas (as Casanovas) & Santafe, 1987
Aralosaurus: Rozhdestvensky, 1968
Aratasaurus: J. Manso Sayão, A.Á. Feitosa Saraiva, A. Souza Brum, R.A. Machado Bantim, R.C. Lima Pedroso de Andrade, Cheng X, F. Jorge de Lima, Helder de Paula Silva & A.W.A. Kellner, 2020
Araucanoraptor: F.E. Novas, 1997 [nomen dubium → Neuquenraptor]
Archaeoceratops: Dong Z-M & Y. Azuma, 1997
Archaeocursor: Yao X, Zhao Q, Ren T-C, Wei G-B & Xu X, 2024 (announced), 2025 (published)
Archaeodontosaurus: E. Buffetaut, 2005
Archaeoraptor: Czerkas vide C.P. Sloan, 1999 vide Olson, 2000 [nomen nudum; JOS → Microraptor]
Archaeornithoides: Elzanowski & Wellnhofer, 1992
Archaeornithomimus: D.A. Russell, 1972

Archaeornithomimus bissektensis renamed Dzharacursor bissektensis, 2025.

Arcovenator: T. Tortosa, E. Buffetaut, N. Vialle, Y. Dutour, E. Turini & G. Cheylan, 2013
Arcusaurus: A.M. Yates, M.F. Bonnan & J. Neveling, 2011
Ardetosaurus: T.T.P. van der Linden, E. Tschopp, R.B. Sookias, J.J.W. Wallaard, F.M. Holwerda & A.S. Schulp, 2024
Arenysaurus: X. Pereda-Suberbiola, J.I. Canudo, P. Cruzado-Caballero, J.L. Barco, N. López-Martínez, O. Oms & J.I. Ruíz-Omeñaca, 2009
Argentinosaurus: J.F. Bonaparte & R.A. Coria, 1993
Argyrosaurus: R. Lydekker, 1893
Aristosaurus: van Hoepen, 1920 [JSS → Massospondylus]
Aristosuchus: H.G. Seeley, 1887 [nomen dubium]
Arkansaurus: R.K. Hunt & J.H. Quinn, 2018 [previously nomen nudum as "Arkanosaurus", H.R. Sattler, 1983]
Arkharavia: V.R. Alifanov & Y.L. Bolotsky, 2010
Arrhinoceratops: Parks, 1925
Arrudatitan: J.C.G. Silva Jr, A.G. Martinelli, F.V. Iori, T.S. Marinho, E.M. Hechenleitner & M.C. Langer, 2021
Arstanosaurus: Suslov vide Suslov & Shilin, 1982 [nomen dubium]
Asfaltovenator: O.W.M Rauhut & D. Pol, 2019
Asiaceratops: Nessov & Kaznyshkina vide Nessov, Kaznyshkina & Cherepanov, 1989
Asiamericana: Nessov, 1995 [nomen dubium]
Asiatosaurus: H.F. Osborn, 1924 [nomen dubium]
Asiatyrannus: Zheng W-J, Jin X-S, Xie J-F & Du T-M, 2024
Asilisaurus: S.J. Nesbitt, C.A. Sidor, R.B. Irmis, K.D. Angielczyk, R.M.H. Smith, & Tsuji L-A, 2010
Astigmasaura: F. Bellardini, L.S. Filippi, J.L. Carballido, A.C. Garrido & M.A. Baiano, 2025
Astrodon: Johnston, 1859 [nomen dubium; PSS → Pleurocoelus]
Astrodonius: Kuhn, 1961 [JOS → Astrodon]
Astrodontaurus: C. Johnston, 1858 vide Kranz, 2004 [JOS → Astrodon]
Astrophocaudia: M.D. D'Emic, 2012
Asylosaurus: P.M. Galton, 2007
Atacamatitan: A.W.A. Kellner, D. Rubilar-Rogers, Vargas & Suárez, 2011
Athenar: J.A. Whitlock, J.P. Garderes, P. Gallina & M.C. Lamanna, 2025
Atlantosaurus: O.C. Marsh, 1877 [nomen dubium; PSS → Apatosaurus or Camarasaurus]
Atlasaurus: Monbaron, D.A. Russell & P. Taquet, 1999
Atlascopcosaurus: T. Rich & P. Vickers-Rich (as P. Rich), 1989
Atrociraptor: P.J. Currie & D.J. Varricchio, 2004
Atsinganosaurus: G. Garcia, S. Amico, F. Fournier, E. Thouand & X. Valentin, 2010
Aublysodon: J. Leidy, 1868 [nomen dubium; PSS → Albertosaurus or Deinodon]
Aucasaurus: R.A. Coria, L.M. Chiappe & L. Dingus, 2002
Augustia (genus also refers to a beetle): J.F. Bonaparte, 1998 / Zariquiey, 1927 → Agustinia
Augustynolophus: A. Prieto-Márquez, J.R. Wagner, P.R. Bell & L.M. Chiappe, 2014
Auroraceratops: You H-L, Li D-Q, Ji Q, M.C. Lamanna & P. Dodson, 2005
Aurornis: P. Godefroit, A. Cau, Hu D-Y, F. Escuillié, Wu W-H & G. Dyke, 2013 [possible bird; PSS → Anchiornis]
Australodocus: Remes, 2007
Australotitan: S.A. Hocknull, M. Wilkinson, R.A. Lawrence, V. Konstantinov, S. Mackenzie & R. Mackenzie, 2021
Australovenator: S.A. Hocknull, M.A. White, T.R. Tischler, A.G. Cook, N.D. Calleja, T. Sloan & D.A. Elliott, 2009
Austrocheirus: M.D. Ezcurra, F.L. Agnolín & F.E. Novas, 2010
Austroposeidon: K.L.N. Bandeira, F. Medeiros Simbras, E. Batista Machado, D.A. Campos, G.R. Oliveira & A.W.A. Kellner, 2016
Austroraptor: F.E. Novas, D. Pol, Canale, J.D. Porfiri & J.O. Calvo, 2008
Austrosaurus: Longman, 1933
Avaceratops: P. Dodson, 1986
Aviatyrannis: O.W.M. Rauhut, 2003
Avimimus: S.M. Kurzanov, 1981
Avipes: F. von Huene, 1932 [nomen dubium]

Baalsaurus: J.O. Calvo & B.J. González-Riga, 2018
Bactrosaurus: C.W. Gilmore, 1933
Bagaceratops: T. Maryanska & H. Osmólska, 1975
Bagaraatan: H. Osmólska, 1996
Bagualia: D. Pol, J. Ramezani, K. Gomez, J.L. Carballido, A.P. Carabajal, O.W.M. Rauhut, I.H. Escapa & N.R. Cúneo, 2020
Bagualosaurus: F.A. Pretto, M.C. Langer & C.L. Schultz, 2018
Bahariasaurus: E. Stromer, 1934
Bainoceratops: Tereschenko & V.R. Alifanov, 2003
Baiyinosaurus: Ning L, S.C.R. Maidment, Daqing L, Hailu Y. & Guangzhao P, 2024
Bajadasaurus: P.A. Gallina, S. Apesteguía, J.I. Canale & A. Haluza, 2019
Bakesaurus: Zhou S, 2005 [nomen nudum]
Balaur: Z. Csiki, M. Vremir, S.L. Brusatte & M.A. Norell, 2010
Balochisaurus: M.S. Malkani, 2006
Bambiraptor: D.A. Burnham, K.L. Derstler, P.J. Currie, R.T. Bakker, Zhou Z. & J.H. Ostrom, 2000
Banji: Xu X. & Han F, 2010
Bannykus: Xu X, J.N. Choiniere, Tan Q, R.B.J. Benson, J.M. Clark, C. Sullivan, Zhao Q, Han F, Ma Q, He Y, Wang S, Xing H. & Tan L, 2018
Baotianmansaurus: Zhang X-L, Lü J-C, Xu L, Li J-H, Yang L-K, Hu W, Jia S, Ji Q. & Zhang C, 2009
Barackosaurus: [Anonymous], 2010 [nomen nudum; in The Dana Quarry Report]
Barapasaurus: Jain, T.S. Kutty, Roy-Chowdhury & S. Chatterjee, 1975
Barilium: D.B. Norman, 2010
Barosaurus: O.C. Marsh, 1890
Barrosasaurus: L. Salgado & R.A. Coria, 2009
Barsboldia: T. Maryanska & H. Osmólska, 1981
Baryonyx: A.J. Charig & A.C. Milner, 1986
Bashanosaurus: Dai H, Li N, S.C.R. Maidment, Wei G-B, Zhou Y-X, Hu X-F, Ma Q-Y, Wang X-Q, Hu H-Q. & Peng G-Z, 2022
Bashunosaurus: Li K, 1998 [nomen nudum; possibly → Datousaurus]
Batyrosaurus: P. Godefroit, F. Escuillié, Y.L. Bolotsky & P. Lauters, 2012
Baurutitan: A.W.A. Kellner, D.A. Campos & Trotta, 2005
Bayannurosaurus: Xu X, Tan Q, Gao Y, Bao Z, Yin Z, Guo B, Wang J, Tan L, Zhang Y. & Xing H, 2018
Bayosaurus: R.A. Coria, P.J. Currie & Carabajal, 2006 [nomen nudum]
Becklespinax: G. Olshevsky, 1991 [PSS → Altispinax]
"Beelemodon": R.T. Bakker, 1997 [nomen nudum]
Beg: Yu C-Y, A. Prieto-Marquez [Prieto-Márquez], Chinzorig T, Badamkhatan Z. & M.A. Norell, 2020
Beibeilong: Pu H-Y, D.K. Zelenitsky, Lü J-C, P.J. Currie, K. Carpenter, Xu L, E.B. Koppelhus, Jia S-H, Xiao L, Chuang H, Li T-R, M. Kundrát & Shen C, 2017
Beipiaognathus: Hu Y, Wang X-R & Huang J-D, 2016
Beipiaosaurus: Xu X, Tang Z. & Wang X-L, 1999
Beishanlong: P.J. Makovicky, Li D-Q, Gao K-Q, M. Lewin, G.M. Erickson & M.A. Norell, 2009
Bellusaurus: Dong Z-M, 1990
Berberosaurus: R. Allain, R.S. Tykoski, Aquesbi, Jalil, Monbaron, D.A. Russell & P. Taquet, 2007
Berthasaura: G. Alves de Souza, M.B. Soares, L.C. Weinschütz, E. Wilner, R.T. Lopes, O.M. Oliveira de Araüjo & A.W.A. Kellner, 2021
Betasuchus: F. von Huene, 1932 [nomen dubium]
Bicentenaria: F.E. Novas, M.D. Ezcurra, F.L. Agnolín, D. Pol & R. Ortíz, 2012
Biconcavoposeidon: M.P. Taylor & M.J. Wedel, 2017 [nomen manuscriptum; published in symposium poster]
Bienosaurus: Dong Z-M, 2001 [nomen dubium]
Bihariosaurus: Marinescu, 1989
Bilbeyhallorum: Burge, J. Bird, McClelland & Cicconetti, 1999 [nomen nudum → Cedarpelta]
Bissektipelta: Parish & P.M. Barrett, 2004
Bistahieversor: T.D. Carr & T.E. Williamson, 2010
Bisticeratops: S.G. Dalman, S.E. Jasinski & S.G. Lucas, 2022
"Blancocerosaurus": G. Maier, 2003 [nomen nudum → Giraffatitan]
Blasisaurus: P. Cruzado-Caballero, X. Pereda-Suberbiola & J.I. Ruíz-Omeñaca, 2010
Blikanasaurus: P.M. Galton & van Heerden, 1985
Bolong: Wu W-H, P. Godefroit & Hu D, 2010
Bonapartenykus: F.L. Agnolín, J.E. Powell, F.E. Novas & M. Kundrát, 2011
Bonapartesaurus: P. Cruzado-Caballero & J. Powell, 2017
Bonatitan: A.G. Martinelli & A.M. Forasiepi, 2004
Bonitasaura: S. Apesteguía, 2004
Borealopelta: C.M. Brown, D.M. Henderson, J. Vinther, I. Fletcher, A. Sistiaga, J. Herrera, R.E. Summons, 2017
Borealosaurus: You H-L, Ji Q, M.C. Lamanna, Li J-L. & Li Y-X, 2004
Boreonykus: P.R. Bell & P.J. Currie, 2015
Borogovia: H. Osmólska, 1987
Bothriospondylus: R. Owen, 1875
Brachiosaurus: Riggs, 1903
Brachyceratops: C.W. Gilmore, 1914
Brachylophosaurus: C.M. Sternberg, 1953
Brachypodosaurus: Chakravarti, 1934 [nomen dubium]
Brachyrophus: E.D. Cope, 1878 [JSS → Camptosaurus]
Brachytrachelopan: O.W.M. Rauhut, K. Remes, R. Fechner, G. Cladera & P. Puerta, 2005
Bradycneme: C.J.O. Harrison & C.A. Walker, 1975 [nomen dubium; PSS → Elopteryx]
Brasilotitan: E.B. Machado, L.S. Avilla, W.R. Nava, D.A. Campos & A.W.A. Kellner, 2013
Bravasaurus: E.M. Hechenleitner, L. Leuzinger, A.G. Martinelli, S. Rocher, L.E. Fiorelli, J.R.A. Taborda & L. Salgado, 2020
Bravoceratops: S.L. Wick & T.M. Lehman, 2013
Breviceratops: S.M. Kurzanov, 1990
Brighstoneus: J.A.F. Lockwood, D.M. Martill & S.C.R. Maidment, 2021
Brohisaurus: M.S. Malkani, 2003
Brontodiplodocus: [Anonymous], 2010 [nomen nudum; in The Dana Quarry Report]
Brontomerus: M.P. Taylor, M.J. Wedel & R.L. Cifelli, 2011
Brontoraptor: Redman, 1995 [nomen nudum]
Brontosaurus: O.C. Marsh, 1879
Brontotholus: D.C. Woodruff, J.R. Horner, M.B. Goodwin & D.C. Evans, 2025
Bruhathkayosaurus: P. Yadagiri & K. Ayyasami, 1987 [nomen dubium]
Bugenasaura: P.M. Galton, 1995 [PSS → Thescelosaurus]
Buitreraptor: P.J. Makovicky, S. Apesteguía & F.L. Agnolín, 2005
Burianosaurus: D. Madzia, C.A. Boyd & M. Mazuch, 2017
Buriolestes: S.F. Cabreira, A.W.A. Kellner, S. Dias-da-Silva, L.R. da Silva, M. Bronzati, J.C. de Almeida Marsola, R. Temp Müller, J. de Souza Bittencourt, B.J.A. Batista, T. Raugust, R. Carrilho, A. Brodt & M.C. Langer, 2016
Bustingorrytitan: M.E. Simón & L. Salgado, 2023
Byranjaffia: Novacek, 2002 [nomen nudum → Byronosaurus]
Byronosaurus: M.A. Norell, P.J. Makovicky & J.M. Clark, 2000

Caenagnathasia: P.J. Currie, Godfrey & Nessov, 1994 (not 1993)
Caenagnathus: R.M. Sternberg, 1940
Caieiria: J.C.G. Silva Jr, A.G. Martinelli, T.S. Marinho, J.I. da Silva & M.C. Langer, 2022
Caihong: Hu D-Y, J.A. Clarke, C.M. Eliason, Qiu R, Li Q-G, M.D. Shawkey, Zhao C-L, L. D'Alba, Jiang J-K & Xu X, 2018
Calamosaurus: R. Lydekker, 1891 [nomen dubium]
Calamospondylus: W.D. Fox vide [Anonymous], 1866 [nomen dubium]

Calamospondylus foxi renamed Calamosaurus foxi, 1891.

Caletodraco: E. Buffetaut, Tong H-Y, J. Girard, B. Hoyez & J. Párraga, 2024
Callovosaurus: P.M. Galton, 1980
Calvarius: A. Prieto-Márquez & A. Sellés, 2023
Camarasaurus: E.D. Cope, 1877
Camarillasaurus: B. Sánchez-Hernández & M.J. Benton, 2012 [online publication, published in 2014]
Camelotia: P.M. Galton, 1985
Campananeyen: L.N. Lerzo, F.T. Fernández-Baldor, J.I. Canale, J.A. Whitlock, A. Otero & P.A. Gallina, 2024
Camposaurus: A.P. Hunt, S.G. Lucas, Heckert, R. Sullivan & Lockley, 1998
Camptonotus: O.C. Marsh, 1879 / Uhler, 1864 → Camptosaurus
Camptosaurus: O.C. Marsh, 1885

Camptosaurus aphanoecetes renamed Uteodon aphanoecetes, 2011.
Camptosaurus depressus renamed Osmakasaurus depressus, 2011.

Campylodon: F. von Huene, 1929 / G. Cuvier & A. Valenciennes, 1832 → Campylodoniscus
Campylodoniscus: Kuhn, 1961 [nomen dubium]
Canardia: A. Prieto-Márquez, F.M. Dalla Vecchia, R. Gaete & À. Galobart, 2013
"Capitalsaurus": Kranz, 1998 [nomen nudum]
Carcharodontosaurus: E. Stromer, 1931
Cardiodon: R. Owen, 1841 [nomen dubium; PSS → Cetiosaurus]
Cariocecus: F. Bertozzo, B. Camilo, R. Araújo, F. Manucci, J.C. Kullberg, D.G. Cerio, V.F. de Carvalho, P. Marrecas, S.D. Figueiredo & P. Godefroit, 2025
Carnosaurus: F. von Huene, 1929 [nomen nudum]
Carnotaurus: J.F. Bonaparte, 1985
Caseosaurus: A.P. Hunt, S.G. Lucas, Heckert, R. Sullivan & Lockley, 1998
Cathartesaura: P.A. Gallina & S. Apesteguía, 2005
Cathetosaurus: J.A. Jensen, 1988 [PSS → Camarasaurus]
Caudipteryx: Ji Q, P.J. Currie, M.A. Norell & Ji S, 1998
Caudocoelus: F. von Huene, 1932 [JOS → Teinurosaurus]
Caulodon: E.D. Cope, 1877 [JSS → Camarasaurus]
Cedarosaurus: Tidwell, K. Carpenter & Brooks, 1999
Cedarpelta: K. Carpenter, J.I. Kirkland, Burge & J. Bird, 2001
Cedrorestes: Gilpin, DiCroce & K. Carpenter, 2006
Centrosaurus: Lambe, 1904 / L.J. Fitzinger, 1843 → Eucentrosaurus

Centrosaurus brinkmani renamed Coronosaurus brinkmani, 2012.

Cerasinops: Chinnery & J.R. Horner, 2007
Ceratonykus: V.R. Alifanov & R. Barsbold, 2009
Ceratops: O.C. Marsh, 1888 / C.S. Rafinesque, 1815 → Proceratops [nomen dubium]
Ceratosaurus: O.C. Marsh, 1884
Ceratosuchops: C.T. Barker, D.W.E. Hone, D. Naish, A. Cau, J.A.F. Lockwood, B. Foster, C.E. Clarkin, P. Schneider & N.J. Gostling, 2021
Cetiosauriscus: F. von Huene, 1927
Cetiosaurus: R. Owen, 1841
Chadtitan: F.L. Agnolín, M.J. Motta, J.G. Marsà, M.A. Aranciagarolando, G. Álvarez-Herrera, N.R. Chimento, S. Rozadilla, F. Brissón-Egli, M.A. Cerroni, K.M. Panzeri, S. Bogan, S. Casadio, J. Sterli, S.E. Miquel, S. Martínez, L.M. Pérez, D. Pol & F.E. Novas, 2025
Chakisaurus: R. Alvarez Nogueira, S. Rozadilla, F.L. Agnolín, J.A. Garcia Marsà, M.J. Motta & F.E. Novas, 2024
Changchunsaurus: Zan S-Q, Chen J, Jin L-Y. & Li T, 2005
Changmiania: Yang Y-Q, Wu W-H, P-E Dieudonné & P. Godefroit, 2020
Changtusaurus: Zhao X, 1983 [nomen nudum]
Changyuraptor: Han G, L.M. Chiappe, Ji S-A, M. Habib, A.H. Turner, A. Chinsamy, Liu X. & Han L, 2014
Chaoyangsaurus: Zhao X, Cheng Z. & Xu X, 1999
Charonosaurus: P. Godefroit, Zan & Jin L-Y, 2000
Chasmosaurus: Lambe, 1914

Chasmosaurus irvinensis renamed Vagaceratops irvinensis, 2010.

Chassternbergia: R.T. Bakker, 1988
Chebsaurus: Mahammed, Läng, Mami, Mekahli, Benhamou, Bouterfa, Kacemi, Chérief, Chaouati & P. Taquet, 2005
Chenanisaurus: N.R. Longrich, X. Pereda-Suberbiola, N-E Jalil, F. Khaldoune & E. Jourani, 2017
Cheneosaurus: Lambe, 1917 [JSS → Hypacrosaurus]
Chialingosaurus: Yang Z.J. (as Young C.C.), 1959
Chiayusaurus: B. Bohlin, 1953 [nomen dubium]
Chihuahuasaurus: Ratkevich vide [Anonymous], 1997 [nomen nudum → Sonorasaurus]
Chilantaisaurus: Hu S, 1964
Chilesaurus: F.E. Novas, L. Salgado, M. Suárez, F.L. Agnolín, M.D. Ezcurra, N.R. Chimento, R. de la Cruz, M.P. Isasi, A.O. Vargas & D. Rubilar-Rogers, 2015
Chindesaurus: R.A. Long & Murry, 1995
Chingkankousaurus: Yang Z.J. (as Young C.C.), 1958 [JSS → Tarbosaurus]
Chinshakiangosaurus: Yeh, 1975 vide Dong Z-M, 1992 vide P. Upchurch, P.M. Barrett, Zhao X. & Xu X, 2007
Chirostenotes: C.W. Gilmore, 1924
Choconsaurus: E. Simón, L. Salgado & J.O. Calvo, 2017
Chondrosteosaurus: R. Owen, 1876 [nomen dubium]
Choyrodon: T.A. Gates, Tsogtbaatar K, L.E. Zanno, Chinzorig T. & M. Watabe, 2018
Chromogisaurus: M.D. Ezcurra, 2010
Chuandongocoelurus: He X, 1984
Chuanjiesaurus: Fang, Pang, Lü J-C, Zhang Z, Pan S, Wang Y, Li X-K. & Cheng Z, 2000
Chuanqilong: Han F, Zheng W, Hu D, Xu X & P.M. Barrett, 2014
Chubutisaurus: del Corro, 1974
Chucarosaurus: F.L. Agnolin, B.J. Gonzalez Riga, A.M. Aranciaga Rolando, S. Rozadilla, M.J. Motta, N.R. Chimento & F.E. Novas, 2023
Chungkingosaurus: Dong Z-M, Zhou S. & Zhang Y.H, 1983
Chuxiongosaurus: Lü J-C, Y. Kobayashi, Li T-G & Zhong S, 2010 [PSS → Jingshanosaurus]
Cienciargentina: M.E. Simón & L. Salgado, 2025
Cinizasaurus: Heckert, 1997 vide S.J. Nesbitt, R.B. Irmis & Parker, 2007 [nomen ex dissertatione]
Cionodon: E.D. Cope, 1874 [nomen dubium]
Citipati: J.M. Clark, M.A. Norell & R. Barsbold, 2001
Citipes: G.F. Funston, 2020
Claorhynchus: E.D. Cope, 1892 [nomen dubium; PSS → Triceratops]
Claosaurus: O.C. Marsh, 1890

Claosaurus annectens renamed Anatosaurus annectens, 1942.

Clasmodosaurus: F. Ameghino, 1898 [nomen dubium]
Clevelanotyrannus: R.T. Bakker, Williams & P.J. Currie vide P.J. Currie, 1987 [nomen nudum → Nanotyrannus]
Coahuilaceratops: M.A. Loewen, S.D. Sampson, E.K. Lund, A.A. Farke, M.C. Aguillón-Martínez, de Leon, R.A. Rodríguez de la Rosa, M.A. Getty & D.A. Eberth, 2010
Coahuilasaurus: N.R. Longrich, A.A. Ramirez Velasco, J. Kirkland, A.E. Bermúdez Torres & C.I. Serrano-Brañas, 2024
Coelophysis: E.D. Cope, 1889
Coelosaurus: J. Leidy, 1865 / [Anonymous, known to be R. Owen], 1854 → Ornithomimus
Coeluroides: F. von Huene & C.A. Matley, 1933 [nomen dubium]
Coelurosaurus: F. von Huene, 1929 [nomen nudum]
Coelurus: O.C. Marsh, 1879
Colepiocephale: R. Sullivan, 2003
Coloradia: J.F. Bonaparte, 1978 / Blake, 1863 → Coloradisaurus
Coloradisaurus: Lambert, 1983
Colossosaurus: G. Mantell, 1849 vide Torrens, 1997 [nomen nudum → Pelorosaurus]
Comahuesaurus: J.L. Carballido, L. Salgado, D. Pol, J.I. Canudo & A.C. Garrido, 2012
Comanchesaurus: A.P. Hunt, 1994 vide S.J. Nesbitt, R.B. Irmis & Parker, 2007 [nomen ex dissertatione]
Compsognathus: J.A. Wagner, 1859
Compsosuchus: F. von Huene & C.A. Matley, 1933
Comptonatus: J.A.F. Lockwood, D.M. Martill & S.C.R. Maidment, 2024
Concavenator: F. Ortega, F. Escaso & J.L. Sanz, 2010
Conchoraptor: R. Barsbold, 1986
Condorraptor: O.W.M. Rauhut, 2005
Convolosaurus: K.A. Andrzejewski, D.A. Winkler & L.L. Jacobs, 2019
Coronosaurus: M.J. Ryan, D.C. Evans & K.M. Shepherd, 2012
Corythoraptor: Lü J-C, Li G-Q, M. Kundrát, Lee Y-N, Sun Z-Y, Y. Kobayashi, Shen C, Teng F-F & Liu H-F, 2017
Corythosaurus: B. Brown, 1914
Craspedodon: L. Dollo, 1883
Crataeomus: H.G. Seeley, 1881 [nomen dubium; PSS → Struthiosaurus]
Craterosaurus: H.G. Seeley, 1874 [nomen dubium; PSS → Regnosaurus]
Creosaurus: O.C. Marsh, 1878 [nomen dubium; PSS → Allosaurus]]
Crichtonpelta: V.M. Arbour & P.J. Currie, 2015
Crichtonsaurus: Dong Z-M, 2002 [nomen dubium]

Crichtonsaurus benxiensis renamed Crichtonpelta benxiensis, 2015.

Cristatusaurus: P. Taquet & D.A. Russell, 1998
Crittendenceratops: S.G. Dalman, J.M. Hodnett, A.J. Lichtig & S.G. Lucas, 2018
Cruxicheiros: R.B.J. Benson & J.D. Radley, 2009
Cryolophosaurus: Hammer & Hickerson, 1994
Cryptodraco: R. Lydekker, 1889 [JOS → Cryptosaurus]
Cryptoraptor: A.P. Hunt, 1994 vide S.J. Nesbitt, R.B. Irmis & Parker, 2007 [nomen ex dissertatione]
Cryptosaurus: H.G. Seeley, 1869
Cryptovolans: Czerkas, Zhang D, Li J-L. & Li Y-X, 2002 [PSS → Microraptor]
Cumnoria: H.G. Seeley, 1888 [PSS → Camptosaurus]
Cylindricodon: R. Owen vide Ingles & Sawyer, 1979 / G. Jaeger, 1828 → Hylaeosaurus

Daanosaurus: Ye, Gao Y. & Jiang S, 2005
Dacentrurus: F.A. Lucas, 1902
Dachungosaurus: Zhao X. (as Chao S.), 1985 [nomen nudum]
Daemonosaurus: H-D Sues, S.J. Nesbitt, D.S. Berman & A.C. Henrici, 2011
Dahalokely: A.A. Farke & J.J.W. Sertich, 2013
Dakotadon: G.S. Paul, 2008
Dakotaraptor: R.A. DePalma, D.A. Burnham, L.D. Martin, P.L. Larson & R.T. Bakker, 2015
Dalianraptor: Gao C. & Liu J-Y, 2005 [possible bird]
Daliansaurus: Shen C-Z, Lü J-C, Liu S, M. Kundrát, S.L. Brusatte & Gao H-L, 2017
Damalasaurus: Zhao X, 1983 [nomen nudum]
Dandakosaurus: P. Yadagiri, 1982 [nomen dubium]
Danubiosaurus: E. Bunzel, 1871 [nomen dubium; PSS → Struthiosaurus]
Daptosaurus: B. Brown vide D. Chure & McIntosh, 1989 [nomen nudum → Deinonychus]
Darwinsaurus: G.S. Paul, 2012
Dashanpusaurus: Peng G, Ye, Gao Y, Shu & Jiang S, 2005
Daspletosaurus: D.A. Russell, 1970 [PSS → Albertosaurus]
Datai: Xing L, Niu K-C, J. Mallon & T. Miyashita, 2024
Datanglong: Mo J, Zhou F, Li G-N, Huang Z & Cao C-Y, 2014
Datonglong: Xu S-C, You H-L, Wang J-W, Wang S-Z, Yi J. & Jia L, 2015
Datousaurus: Dong Z-M & Tang Z, 1984
Daurlong: Wang X, Cau A, Guo B, Ma F, Qing G & Liu Y-C, 2022
Daurosaurus: V.R. Alifanov & S.V. Saveliev, 2014 [PSS → Kulindadromeus]
Daxiatitan: You H-L, Li D-Q, Zhou L. & Ji Q, 2008
Deinocheirus: H. Osmólska & Roniewicz, 1970
Deinodon: J. Leidy, 1856 [nomen dubium; PSS → Albertosaurus]
Deinonychus: J.H. Ostrom, 1969
Delapparentia: J.I. Ruíz-Omeñaca, 2011
Deltadromeus: P.C. Sereno, Duthiel, Iarochene, H.C.E. Larsson, Lyon, Magwene, C.A. Sidor, D.J. Varricchio & J.A. Wilson, 1996
Demandasaurus: F.T. Fernández-Baldor, J.I. Canudo, P. Huerta, D. Montero, X. Pereda-Suberbiola & L. Salgado, 2010
Denversaurus: R.T. Bakker, 1988
Diabloceratops: J.I. Kirkland & D.D. DeBlieux, 2010
Diamantinasaurus: S.A. Hocknull, M.A. White, T.R. Tischler, A.G. Cook, N.D. Calleja, T. Sloan & D.A. Elliott, 2009
Diceratops: Lull vide Hatcher, 1905 / Foerster, 1868 → Diceratus (unnecessary) & Nedoceratops
Diceratus: O. Mateus, 2008 [JOS → Nedoceratops]
Diclonius: E.D. Cope, 1876 [nomen dubium]
Dicraeosaurus: Janensch, 1914
Didanodon: H.F. Osborn, 1902 [nomen dubium; PSS → Lambeosaurus]
Dilong (genus also refers to a mythological Earth Dragon): Xu X, M.A. Norell, Kuang, Wang X-L, Zhao Q. & Jia C, 2004
Dilophosaurus: Welles, 1970
Diluvicursor: M.C. Herne, A.M. Tait, V. Weisbecker, M. Hall, J.P. Nair, M. Cleeland & S.W. Salisbury, 2018
Dimodosaurus: Pidancet & Chopard, 1862 [nomen dubium; PSS → Plateosaurus]
Dineobellator: S.E. Jasinski, R.M. Sullivan & P. Dodson, 2020
Dinheirosaurus: J.F. Bonaparte & O. Mateus, 1999
Dinodocus: R. Owen, 1884 [nomen dubium]
Dinosaurus: L. Rütimeyer, 1856 / Fischer von Waldheim, 1847 → Gresslyosaurus
Dinotyrannus: G. Olshevsky vide G. Olshevsky, Ford & Yamamoto, 1995 [JSS → Tyrannosaurus]
Diodorus: C.F. Kammerer, S.J. Nesbitt & N.H. Shubin, 2011
Diplodocus: O.C. Marsh, 1878

Diplodocus hayi renamed Galeamopus hayi, 2015.

Diplotomodon: J. Leidy, 1868 [nomen dubium; PSS → Dryptosaurus]
Diracodon: O.C. Marsh, 1881 [nomen dubium; PSS → Stegosaurus]
Diuqin: J.D. Porfiri, M.A. Baiano, D.D. dos Santos, F.A. Gianechini, M. Pittman & M.C. Lamanna, 2024
Dolichosuchus: F. von Huene, 1932 [nomen dubium]
Dollodon: G.S. Paul, 2008 [PSS → Mantellisaurus]
Domeykosaurus: D. Rubilar-Rogers (as Rubilar) & Vargas vide [Anonymous], 2003 [nomen nudum; in May 29, 2003 Reuters news reports]
Dongbeititan: Wang X-R, You H-L, Meng Q, Gao C, Chang X. & Liu J-Y, 2007
Dongshengosaurus: Pan R, 2015 [nomen ex dissertatione]
Dongyangopelta: Chen R, Zheng W, Y. Azuma, M. Shibata, Lou, Jin Q & Jin X, 2013 [PSS → Zhejiangosaurus]
Dongyangosaurus: Lü J-C, Y. Azuma, Chen R, Zheng W. & Jin X, 2008
Dornraptor: M.G. Baron, 2024
Doryphorosaurus: F. Nopcsa, 1916 [JOS → Kentrosaurus]
Draconyx: O. Mateus & Telles Antunes, 2001
Dracopelta: P.M. Galton, 1980
Dracoraptor: D.M. Martill, S.U. Vidovic, C. Howells & J.R. Nudds, 2016
Dracorex: R.T. Bakker, R. Sullivan, Porter, P.L. Larson & Saulsbury, 2006 [PSS → juvenile Pachycephalosaurus]
Dracovenator: A.M. Yates, 2006 [for 2005]
Dravidosaurus: P. Yadagiri & K. Ayyasami, 1979
Dreadnoughtus: K.J. Lacovara, M.C. Lamanna, L.M. Ibiricu, J.C. Poole, E.R. Schroeter, P.V. Ullmann, K.K. Voegele, Z.M. Boles, A.M. Carter, E.K. Fowler, V.M. Egerton, A.E. Moyer, C.L. Coughenour, J.P. Schein, J.D. Harris, R.D. Martínez & F.E. Novas, 2014
Drinker: R.T. Bakker, P.M. Galton, Siegwarth & Filla, 1990 [PSS → Nanosaurus]
Dromaeosauroides: P. Christiansen & Bonde, 2003
Dromaeosaurus: Matthew & B. Brown, 1922
Dromiceiomimus: D.A. Russell, 1972
Dromicosaurus: van Hoepen, 1920 [JSS → Massospondylus]
Dromomeron: R.B. Irmis, S.J. Nesbitt, Padian, N.D. Smith, A.H. Turner, Woody & A. Downs, 2007
Drusilasaura: C. Navarrete, G.A. Casal & R.D. Martínez, 2011
Dryosaurus: O.C. Marsh, 1894
Dryptosauroides: F. von Huene & C.A. Matley, 1933 [nomen dubium]
Dryptosaurus: O.C. Marsh, 1877
Dubreuillosaurus: R. Allain, 2005
Duonychus: Y. Kobayashi, D.K. Zelenitsky, A.R. Fiorillo & T. Chinzorig, 2025
Duriatitan: P.M. Barrett, R.B.J. Benson & P. Upchurch, 2010
Duriavenator: R.B.J. Benson, 2008
Dynamosaurus: H.F. Osborn, 1905 [JSS → Tyrannosaurus]
Dynamoterror: A.T. McDonald, D.G. Wolfe & A.C. Dooley Jr, 2018
Dyoplosaurus: Parks, 1924
Dysalotosaurus: Virchow, 1919 [JSS → Dryosaurus]
Dysganus: E.D. Cope, 1876 [nomen dubium]
Dyslocosaurus: McIntosh, Coombs & D.A. Russell, 1992
Dystrophaeus: E.D. Cope, 1877
Dystylosaurus: J.A. Jensen, 1985 [JSS → Supersaurus]
Dzharacursor: A.O. Averianov & H-D Sues, 2025
Dzharaonyx: A.O. Averianov & H-D Sues, 2022
Dzharatitanis: A.O. Averianov & H-D Sues, 2021

Echinodon: R. Owen, 1861
Edmarka: R.T. Bakker, Kralis, Siegwarth & Filla, 1992
Edmontonia: C.M. Sternberg, 1928
Edmontosaurus: Lambe, 1917
Efraasia: P.M. Galton, 1973
Einiosaurus: S.D. Sampson, 1995
Ekrixinatosaurus: J.O. Calvo, D. Rubilar-Rogers & Moreno, 2004
Elaltitan: P.D. Mannion & A. Otero, 2012
Elaphrosaurus: Janensch, 1920
Elemgasem: M.A. Baiano, D. Pol, F. Bellardini, G.J. Windholz, I.A. Cerda, A.C. Garrido & R.A. Coria, 2022
Elmisaurus: H. Osmólska, 1981
Elosaurus: Peterson & C.W. Gilmore, 1902 [JSS → Apatosaurus]
Elrhazosaurus: P.M. Galton, 2009
Elvisaurus: Holmes, 1993 [nomen nudum → Cryolophosaurus]
Emausaurus: Haubold, 1990
Embasaurus: Riabinin, 1931 [nomen dubium]
Emiliasaura: R.A. Coria, I.A. Cerda, F. Escaso, M.A. Baiano, F. Bellardini, A. Braun, L.M. Coria, J.M. Gutierrez, D. Pino, G.J. Windholz, P.J. Currie & F. Ortega, 2024 (announced), 2025 (published)
Enigmacursor: S.C.R. Maidment & P.M. Barrett, 2025
Enigmosaurus: R. Barsbold & A. Perle vide R. Barsbold, 1983 [JSS → Erlikosaurus]
Eoabelisaurus: D. Pol & O.W.M. Rauhut, 2012
Eobrontosaurus: R.T. Bakker, 1998
Eocarcharia: P.C. Sereno & S.L. Brusatte, 2008
Eoceratops: Lambe, 1915 [PSS → Chasmosaurus]
Eocursor: R.J. Butler, R.M.H. Smith & D.B. Norman, 2007
Eodromaeus: R.N. Martínez, P.C. Sereno, O.A. Alcober, C.E. Colombi, P.R. Renne, I.P. Montañez & B.S. Currie, 2011
"Eohadrosaurus": J.I. Kirkland, 1997 [nomen nudum → Eolambia]
Eolambia: J.I. Kirkland, 1998
Eomamenchisaurus: Lü J-C, Li T-G, Zhong S, Ji Q. & Li S-X, 2008
Eoneophron: K.L. Atkins-Weltman, D.J. Simon, H.N. Woodward, G.F. Funston & E. Snively, 2024
Eoplophysis: R.E. Ulansky, 2014
Eoraptor: P.C. Sereno, C.A. Forster, R.R. Rogers & Monetta, 1993
Eosinopteryx: P. Godefroit, H. Demuynck, G. Dyke, Hu D, F. Escuillié & P. Claeys, 2013 [possible bird]
Eotrachodon: A. Prieto-Márquez, G.M. Erickson & J.A. Ebersole, 2016
Eotriceratops: Wu X-C, D. Brinkman, D.A. Eberth & D.R. Braman, 2007
Eotyrannus: S. Hutt, D. Naish, D.M. Martill, Barker & Newberry, 2001
Eousdryosaurus: F. Escaso, F. Ortega, P. Dantas, E. Malafaia, B. Silva, J.M. Gasulla, P. Mocho, I. Narváez & J.L. Sanz, 2014
Epachthosaurus: J.E. Powell, 1990
Epanterias: E.D. Cope, 1878 [nomen dubium; PSS → Allosaurus or Saurophaganax]
Epichirostenotes: R.M. Sullivan, S.E. Jasinski & M.P.A. Van Tomme, 2011
Epidendrosaurus: Zhang F, Zhou Z, Xu X. & Wang X-L, 2002 [JOS → Scansoriopteryx]
Epidexipteryx: Zhang F, Zhou Z, Xu X, Wang X-L & C. Sullivan, 2008
Equijubus: You H-L, Luo, Shubin, Witmer, Tang Z. & Tang F, 2003
Erectopus: F. von Huene, 1922
Erketu: Ksepka & M.A. Norell, 2006
Erliansaurus: Xu X, Zhang X.H, P.C. Sereno, Zhao X, Kuang, Han J. & Tan L, 2002
Erlikosaurus: A. Perle vide R. Barsbold & A. Perle, 1980
Erythrovenator: R.T. Müller, 2020
Eshanosaurus: Xu X, Zhau X. & J.M. Clark, 2001
Euacanthus: R. Owen vide Tennyson, 1897 [nomen nudum; JOS → Polacanthus]
Eucamerotus: J.W. Hulke, 1872 [nomen dubium]
Eucentrosaurus: D. Chure & McIntosh, 1989 [JOS → Centrosaurus]
Eucercosaurus: H.G. Seeley, 1879 [nomen dubium; PSS → Acanthopholis]
Eucnemesaurus: van Hoepen, 1920
Eucoelophysis: R. Sullivan & S.G. Lucas, 1999
Eugongbusaurus: F. Knoll, 1999
Euhelopus: Romer, 1956
Euoplocephalus: Lambe, 1910
Eureodon: B. Brown vide G. Olshevsky, 1991 [nomen nudum → Tenontosaurus]
Euronychodon: Telles Antunes & Sigogneau-Russell, 1991
Europasaurus: O. Mateus, Laven & Knötschke vide P.M. Sander, O. Mateus, Laven & Knötschke, 2006
Europatitan: F.T. Fernández-Baldor, J.I. Canudo, P. Huerta, M. Moreno-Azanza & D. Montero, 2017
Europelta: J.I. Kirkland, L. Alcalá, M.A. Loewen, E. Espílez, L. Mampel & J.P. Wiersma, 2013
Euskelosaurus: T.H. Huxley, 1866
Eustreptospondylus: A.D. Walker, 1964

Fabrosaurus: Ginsburg, 1964 [nomen dubium]
Falcarius: J.I. Kirkland, L.E. Zanno, S.D. Sampson, J.M. Clark & D.D. DeBlieux, 2005
Fenestrosaurus: H.F. Osborn, 1924 [nomen nudum → Oviraptor]
Ferganasaurus: V.R. Alifanov & A.O. Averianov, 2003
Ferganastegos: R.E. Ulansky, 2014
Ferganocephale: A.O. Averianov, T. Martin & Bakirov, 2005
Ferrisaurus: V.M. Arbour & D.C. Evans, 2019
Fona: H.M. Avrahami, P.J. Makovicky, R.T. Tucker & L.E. Zanno, 2024
Foraminacephale: R.K. Schott & D.C. Evans, 2016
Fosterovenator: S.G. Dalman, 2014
Fostoria: P.R. Bell, T. Brougham, M.C. Herne, T. Frauenfelder & E.T. Smith, 2019
Frenguellisaurus: F.E. Novas, 1986 [JSS → Herrerasaurus]
Fruitadens: R.J. Butler, P.M. Galton, L.B. Porro, L.M. Chiappe, D.M. Henderson & G.M. Erickson, 2009
Fukuiraptor: Y. Azuma & P.J. Currie, 2000
Fukuisaurus: Y. Kobayashi & Y. Azuma, 2003
Fukuititan: Y. Azuma & M. Shibata, 2010
Fukuivenator: Y. Azuma, Xu X, M. Shibata, S. Kawabe, K. Miyata & T. Imai, 2016
Fulengia: Carroll & P.M. Galton, 1977 [JSS → Lufengosaurus]
Fulgurotherium: F. von Huene, 1932
Furcatoceratops: H. Ishikawa, T. Tsuihiji & M. Manabe, 2023
Fushanosaurus: Wang X-R, Wu W-H, Li T, Ji Q, Li Y-X. & Guo J-F, 2019
Fusinasus: S. Hutt, 2002 [nomen nudum → Eotyrannus]
Fusuisaurus: Mo, Wang W, Huang Z, Huang X. & Xu X, 2006
Futalognkosaurus: J.O. Calvo, J.D. Porfiri, B.J. González-Riga & A.W.A. Kellner, 2007
Fylax: A. Prieto-Márquez, M.A. Carrera Farias, 2021

Gadolosaurus: Saito, 1979 [nomen nudum, possilbe misspelling of Hadrosaurus]
Galeamopus: E. Tschopp, O.V. Mateus & R.J.B. Benson, 2015
Galleonosaurus: M.C. Herne, J.P. Nair, A.R. Evans, & A.M. Tait, 2019
Gallimimus: H. Osmólska, Roniewicz & R. Barsbold, 1972
Galveosaurus: Sánchez-Hernández, 2005
Galvesaurus: J.L. Barco, J.I. Canudo, G. Cuenca-Bescós & J.I. Ruíz-Omeñaca, 2005 [JOS → Galveosaurus]
Gandititan: Han F-G, Yang L, Lou F, C. Sullivan, Xu X, Qiu W-J, Liu H-F, Yu J, Wu R, Ke Y-H, Xu M-Y, Hu J-F & Lu P, 2024
Gannansaurus: Lü J-C, Yi L-P, Zhong H & Wei X-F, 2013
Gansutitan: You H-L, Li D-Q, Zhou L. & Ji Q, 2008 [nomen nudum → Daxiatitan]
Ganzhousaurus: Wang S, Sun C, C. Sullivan & Xu X, 2013
Gargantuavis: E. Buffetaut & J. LeLoeuff, 1998 [described as avian, possibly theropod]
Gargoyleosaurus: K. Carpenter, C.A. Miles & K. Cloward, 1998
Garrigatitan: V.D. Díaz, G. Garcia, X.P. Suberbiola, B. Jentgen-Ceschino, K. Stein, P. Godefroit & X. Valentin, 2020
Garudimimus: R. Barsbold, 1981
Garumbatitan: P. Mocho, F. Escaso, J.M. Gasulla, À. Galobart, B. Poza, A. Santos-Cubedo, J.L. Sanz & F. Ortega, 2023
Gasosaurus: Dong Z-M, 1985
Gasparinisaura: R.A. Coria & L. Salgado, 1996
Gastonia (genus also refers to a plant): J.I. Kirkland, 1998
Gavinosaurus: Kelly, 1998 [nomen nudum → Eotyrannus]
Geminiraptor: P. Senter, J.I. Kirkland, J. Bird & J.A. Bartlett, 2010
Genusaurus: Accarie, Beaudoin, Dejax, Fries, Michard & P. Taquet, 1995
Genyodectes: Woodward, 1901
Geranosaurus: R. Broom, 1911
Gideonmantellia: J.I. Ruiz-Omeñaca, J.I. Canudo, G. Cuenca-Bescós, P. Cruzado-Caballero, J.M. Gasca & M. Moreno-Azanza, 2012
Gigantoraptor: Xu X, Tan Q, Wang J, Zhao X. & Tan L, 2007
Giganotosaurus: R.A. Coria & L. Salgado, 1995
Gigantosaurus: H.G. Seeley, 1869 [nomen dubium; PSS → Pelorosaurus]
Gigantosaurus: E. Fraas, 1908 / H.G. Seeley, 1869 → Tornieria
Gigantoscelus: van Hoepen, 1916 [JSS → Euskelosaurus]
Gigantspinosaurus: Ouyang H, 1992
Gilmoreosaurus: M.K. Brett-Surman, 1979
Ginnareemimus: Kaneko, 2000 [nomen nudum → Kinnareemimus]
Giraffatitan: G.S. Paul, 1988
Glacialisaurus: N.D. Smith & D. Pol, 2007
Glishades: A. Prieto-Márquez, 2010 [nomen dubium; juvenile]
Glyptodontopelta: Ford, 2000
Gnathovorax: C. Pacheco, R.T. Müller, M. Langer, F.A. Pretto, L. Kerber & S. Dias da Silva, 2019
Gobiceratops: V.R. Alifanov, 2008 [PSS → Bagaceratops (adolescent ?)]
Gobihadros: Tsogtbaatar K, D.B. Weishampel, D.C. Evans & M. Watabe, 2019
Gobiraptor: Lee S, Lee Y-N, A. Chinsamy, Lü J, R. Barsbold & Tsogtbaatar K, 2019
Gobisaurus: Vickaryous, A.P. Russell, P.J. Currie & Zhao X, 2001
Gobititan: You H-L, Tang F. & Luo, 2003
Gobivenator: T. Tsuihiji, R. Barsbold, M. Watabe, Tsogtbaatar K, T. Chinzorig, Y. Fujiyama, S. Suzuki, 2014
Godzillasaurus: Ikejiri, 2003 [nomen nudum; JOS → Gojirasaurus (misspelled)]
Gojirasaurus: K. Carpenter, 1997
Gondwanatitan: A.W.A. Kellner & Azevedo, 1999
Gongbusaurus: Dong Z-M, Zhou S. & Zhang Y-H, 1983
Gongpoquansaurus: You H-L, Li D-Q & P. Dodson, 2014
Gongxianosaurus: He X, Wang C, Liu S, Zhou F, Liu T, Cai & Dai B, 1998
Gonkoken: J. Alarcón-Muñoz, A.O. Vargas, H.P. Püschel, S. Soto-Acuña, L. Manríquez, M. Leppe, J. Kaluza, V. Milla, C.S. Gutstein, J. Palma-Liberona, W. Stinnesbeck, E. Frey, J.P. Pino, D. Bajor, E. Núñez, H. Ortiz, D. Rubilar-Rogers & P. Cruzado-Caballero, 2023
Gorgosaurus: Lambe, 1914 [PSS → Albertosaurus]
Goyocephale: A. Perle, T. Maryanska & H. Osmólska, 1982
Graciliceratops: P.C. Sereno, 2000
Graciliraptor: Xu X. & Wang X-L, 2004
Gravisaurus: Chabli vide D.B. Norman, 1989 [nomen nudum → Lurdusaurus]
Gravitholus: Wall & P.M. Galton, 1979 [nomen dubium]
Gremlin: M.J. Ryan, L. Micucci, H. Rizo, C. Sullivan, Lee Y-N & D.C. Evans, 2023
Gresslyosaurus: L. Rütimeyer, 1856 [PSS → Plateosaurus]
"Gripposaurus": P.M. Barrett, P. Upchurch, Zhou X. & Wang X, 2007 [nomen nudum]
Gryphoceratops: M.J. Ryan, D.C. Evans, P.J. Currie, C.M. Brown & D. Brinkman, 2012
Gryphognathus (name, Griphognathus, also refers to a lungfish): M.J. Ryan, D.C. Evans, P.J. Currie, C.M. Brown & D. Brinkman, 2011 [nomen manuscriptum → Gryphoceratops]
Gryponyx: R. Broom, 1911 [JSS → Massospondylus]
Gryposaurus: Lambe, 1914
Gspsaurus: M.S. Malkani, 2014
Guaibasaurus: J.F. Bonaparte, Ferigolo & A. Ribeiro, 1999
Gualicho: S. Apesteguía, N.D. Smith, R.D. Juárez-Valieri & P.J. Makovicky, 2016
Guanlong: Xu X, J.M. Clark, C.A. Forster, M.A. Norell, G.M. Erickson, D.A. Eberth, Jia C. & Zhao Q, 2006
Guemesia: F.L. Agnolín, M.A. Cerroni, A. Scanferla, A. Goswami, A. Paulina-Carabajal, T. Halliday, A.R. Cuff & S. Reuil, 2022
Gyposaurus: R. Broom, 1911 [JSS → Massospondylus]

"Hadrosauravus": Lambert, 1990 [nomen nudum → Gryposaurus]
Hadrosaurus: J. Leidy, 1859 [nomen dubium]

Hadrosaurus agilis renamed Claosaurus agilis, 1890.

Haestasaurus: P. Upchurch, P.D. Mannion & M.P. Taylor, 2015
Hagryphus: L.E. Zanno & S.D. Sampson, 2005
Halszkaraptor: A. Cau, V. Beyrand, D.F.A.E. Voeten, V. Fernandez, P. Tafforeau, K. Stein, R. Barsbold, Tsogtbaatar K, P.J. Currie & P. Godefroit, 2017
Halticosaurus: F. von Huene, 1908 [nomen dubium]
Hamititan: Wang X-L, K.L.N. Bandeira, Qiu R, Jiang S-X, Cheng X, Ma Y-X & A.W.A. Kellner, 2021
Hanssuesia: R. Sullivan, 2003
"Hanwulosaurus": [Anonymous] 2001 [nomen nudum; in Xinhua News Service news articles]
Haplocanthosaurus: Hatcher, 1903
Haplocanthus: Hatcher, 1903 / L. Agassiz, 1845 → Haplocanthosaurus
Haplocheirus: J.N. Choiniere, Xu X, J.M. Clark, C.A. Forster, Guo Y. & Han F, 2010
Harenadraco: Lee S, Lee Y-N, Park J-Y, Kim S-H, Z. Badamkhatan, D. Idersaikhan & K. Tsogtbaatar, 2024
Harpymimus: R. Barsbold & A. Perle, 1984
Haya: P.J. Makovicky, B.M. Kilbourne, R.W. Sadleir & M.A. Norell, 2011
Hecatasaurus: B. Brown, 1910 [JOS → Telmatosaurus]
Heilongjiangosaurus: Li W. & Jin J, 2001 [nomen nudum]
Heishansaurus: B. Bohlin, 1953 [nomen dubium]
Helioceratops: Jin L-Y, Chen J, Zan S. & P. Godefroit, 2009
Helopus: Wiman, 1929 / J.G. Wagler, 1832 → Euhelopus
Heptasteornis: C.J.O. Harrison & C.A. Walker, 1975 [nomen dubium; PSS → Elopteryx]
Herrerasaurus: Reig, 1963
Hesperonychus: N.R. Longrich & P.J. Currie, 2009
Hesperonyx: F.M. Rotatori, L. Ferrari, C. Sequero, B. Camilo, O. Mateus & M. Moreno-Azanza, 2024
Hesperornithoides: S. Hartman, M. Mortimer, W.R. Wahl, D.R. Lomax, J. Lippincott & D.M. Lovelace, 2019
Hesperosaurus: K. Carpenter, C.A. Miles & K. Cloward, 2001
Heterodontosaurus: Crompton & A.J. Charig, 1962
Heterosaurus: Cornuel, 1850 [JSS → Iguanodon]
Hexing: Jin L-Y, Chen J. & P. Godefroit, 2012
Hexinlusaurus: P.M. Barrett, R.J. Butler & F. Knoll, 2005
Heyuannia: Lü J-C, 2003
Hierosaurus: Wieland, 1909
Hikanodon: G. Mantell vide J. Nöggerath, 1826 [JOS → Iguanodon]
Hippodraco: A.T. McDonald, J.I. Kirkland, D.D. DeBlieux, S.K. Madsen, J. Cavin, A.R.C. Milner & L. Panzarin, 2010
"Hironosaurus": Hisa, 1988 [nomen nudum]
"Hisanohamasaurus": Lambert, 1990 [nomen nudum]
Histriasaurus: F.M. Dalla Vecchia, 1998
Homalocephale: T. Maryanska & H. Osmólska, 1974
Honghesaurus: [Anonymous], 1981 [nomen nudum → Yandusaurus]
Hongshanosaurus: You H-L, Xu X. & Wang X-L, 2003
Hoplitosaurus: F.A. Lucas, 1902
Hoplosaurus: H.G. Seeley, 1881 [nomen dubium; PSS → Struthiosaurus]
Horshamosaurus: W.T. Blows, 2015
Hortalotarsus: H.G. Seeley, 1894 [JSS → Massospondylus]
Huabeisaurus: Pang & Cheng Z, 2000
Huadanosaurus: R. Qiu, X. Wang, S. Jiang, J. Meng & Z. Zhou, 2025
Hualianceratops: Han F, C.A. Forster, J.M. Clark & Xu X, 2015
Huallasaurus: S. Rozadilla, F. Brissón-Eglí, F.L. Agnolín, A.M. Aranciaga-Rolando & F.E. Novas, 2022
Huanansaurus: Lü J-C, Pu H-Y, Y. Kobayashi, Xu L, Chang H, Shang Y-H, Liu D, Lee Y-N, M. Kundrát & Shen C, 2015
Huanghetitan: You H-L, Li D-Q, Zhou L. & Ji Q, 2006
Huangshanlong: Huang J-D, You H-L, Yang J-T & Ren X-X, 2014
Huashanosaurus: Mo J-Y, Zhou X-Z, Fu Q-Y, Xiong D, Hu M-H & Xu X, 2025
Huaxiagnathus: Hwang, M.A. Norell, Ji Q. & Gao K-Q, 2004
Huaxiaosaurus: Zhao X, Wang K. & Li D-J, 2011 [PSS → Shantungosaurus]
"Huaxiasaurus": Rey, 2002 [nomen nudum → Huaxiagnathus]
Huaxiazhoulong: Zhu Z, Wu J, You Y, Jia Y-L, Chen C-J, Yao X, Zheng W-J & Xu X, 2024
Huayangosaurus: Dong Z-M, Tang Z. & Zhou S, 1982
Huayracursor: E.M. Hechenleitner, A.G. Martinelli, S. Rocher, L.E. Fiorelli, M. Juarez, J.R.A. Taborda & J.B. Desojo, 2025
Hudiesaurus: Dong Z-M, 1997
Huehuecanauhtlus: A.A. Ramírez-Velasco. M. Benammi, A. Prieto-Márquez, J.A. Ortega & R. Hernández-Rivera, 2012
Huinculsaurus: M.A. Baiano, R.A. Coria & A. Cau, 2020
Hulsanpes: H. Osmólska, 1982
Hungarosaurus: Ösi A, 2005
Huxleysaurus: G.S. Paul, 2012
Hylaeosaurus: G. Mantell, 1833
Hylosaurus: L.J. Fitzinger, 1840 [JOS → Hylaeosaurus]
Hypacrosaurus: B. Brown, 1913
Hypnovenator: K. Kubota, Y. Kobayashi & T. Ikeda, 2024
Hypselosaurus: Matheron, 1869
Hypselospinus: D.B. Norman, 2010
Hypsibema: E.D. Cope, 1869 [nomen dubium]
Hypsilophodon: T.H. Huxley, 1869
Hypsirophus: E.D. Cope, 1878 [nomen dubium; PSS → Stegosaurus]

Iani: L.E. Zanno, T.A. Gates, H.M. Avrahami, R.T. Tucker & P.J. Makovicky, 2023
Iberospinus: O. Mateus & D. Estraviz-López, 2022
Ibirania: B.A. Navarro, A.M. Ghilardi, T. Aureliano, V. Díez Díaz, K.L.N. Bandeira, A.G.S. Cattaruzzi, F.V. Iori, A.M. Martine, A.B. Carvalho, L.E. Anelli, M.A. Fernandes & H. Zaher, 2022
"Ichabodcraniosaurus": Novacek, 1996 [nomen nudum]
Ichthyovenator: R. Allain, T. Xaisanavong, P. Richir & B. Khentavong, 2012
Igai: E. Gorscak, M.C. Lamanna, D. Schwarz, V. Díez Díaz, B.S. Salem, H.M. Sallam & M.F. Wiechmann, 2023
Ignavusaurus: F. Knoll, 2010 [PSS → Massospondylus]
Ignotosaurus: R.N. Martínez, C. Apaldetti, O.A. Alcober, C.E. Colombi, P.C. Sereno, E. Fernandez, P.S. Malnis, G.A. Correa & D. Abelin, 2013
Iguanacolossus: A.T. McDonald, J.I. Kirkland, D.D. DeBlieux, S.K. Madsen, J. Cavin, A.R.C. Milner & L. Panzarin, 2010
Iguanodon: G. Mantell, 1825

Iguanodon lakotaensis renamed Dakotadon lakotaensis, 2008.
Iguanodon anglicus renamed Kukufeldia anglicus, 2010.
Iguanodon dawsoni renamed Barilium dawsoni, 2010.
Iguanodon fittoni renamed Hypselospinus fittoni, 2010.
Iguanodon galvensis renamed Paulodon galvensis, 2025.

"Iguanoides": Conybeare vide Cadbury, 2000 [nomen nudum → Iguanodon]
Iguanosaurus: [Anonymous], 1824 [nomen nudum → Iguanodon]
Iliosuchus: F. von Huene, 1932
Ilokelesia: R.A. Coria & L. Salgado,2000 (not 1998)
Imperobator: R.C. Ely & J.A. Case, 2019
Inawentu: L.S. Filippi, R.D. Juárez Valieri, P.A. Gallina, A.H. Méndez, F.A. Gianechini & A.C. Garrido, 2023 (announced), 2024 (published)
Incisivosaurus: Xu X, Cheng Y, Wang X-L & Chang C, 2002 [PSS → Protarchaeopteryx]
Indosaurus: F. von Huene & C.A. Matley, 1933
Indosuchus: F. von Huene & C.A. Matley, 1933
Ingenia (genus also refers to a marine Nematode): R. Barsbold, 1981 / Gerlach, 1957 → Heyuannia
Ingentia: C. Apaldetti, R.N. Martínez, I.A. Cerda, D. Pol & O. Alcober, 2018
Inosaurus: de Lapparent, 1960 [nomen dubium]
Invictarx: A.T. McDonald & D.G. Wolfe, 2018
Irisosaurus: C. Peyre de Fabrègues, Bi S-D, Li H-Q, Li G, Yang L. & Xu X, 2020
Irritator: D.M. Martill, Cruickshank, Frey, P.G. Small & M. Clarke, 1996
Isaberrysaura: L. Salgado, J.I. Canudo, A.C. Garrido, M. Moreno-Azanza, L.C.A. Martínez, R.A. Coria & J.M. Gasca, 2017
Isanosaurus: E. Buffetaut, V. Suteethorn, Cuny, Tong H, J. LeLoeuff, Khansubha & Jongautchariyakul, 2000
Isasicursor: F.E. Novas, F.L. Agnolín, S. Rozadilla, A.M. Aranciaga-Rolando, F. Brissón-Eglí, M.J. Motta, M.A. Cerroni, M.D. Ezcurra, A.G. Martinelli, J.S. D'Angelo, G. Álvarez-Herrera, A.R. Gentil, S. Bogan, N.R. Chimento, J.A. García-Marsà, G. Lo Coco, S.E. Miquel, F.F. Brito, E.I. Vera, V.S. Perez Loinaze, M.S. Fernández & L. Salgado, 2019
Ischioceratops: He Y, P.J. Makovicky, Wang K, Chen S, C. Sullivan, Han F. & Xu X, 2015
Ischisaurus: Reig, 1963 [JSS → Herrerasaurus]
Ischyrosaurus: J.W. Hulke, 1874 vide R. Lydekker, 1888 / E.D. Cope, 1869
Isisaurus: J.A. Wilson & P. Upchurch, 2003
"Issasaurus": G. Maier, 2003 [nomen nudum → Dicraeosaurus]
Issi: V. Beccari, O. Mateus, O. Wings, J. Milàn & L.B. Clemmensen, 2021
Istiorachis: J.A.F. Lockwood, D.M. Martill & S.C.R. Maidment 2025
Itapeuasaurus: R.M. Lindoso, M.A.A. Medeiros, I. Carvalho, A.A. Pereira, I.D. Mendes, F.V. Iori, E.P. Sousa, S.H.S. Arcanjo & T.C.M. Silva, 2019
Itemirus: S.M. Kurzanov, 1976
Iuticosaurus: J. LeLoeuff, 1993 [nomen dubium]
Ixalerpeton: S.F. Cabreira, A.W.A. Kellner, S. Dias-da-Silva, L.R. da Silva, M. Bronzati, J.C. de Almeida Marsola, R. Temp Müller, J. de Souza Bittencourt, B.J.A. Batista, T. Raugust, R. Carrilho, A. Brodt & M.C. Langer, 2016
Iyuku: C.A. Forster, W.J. de Klerk, K.E. Poole, A. Chinsamy-Turan, E.M. Roberts & C.F. Ross, 2022

Jaculinykus: K. Kubo, Y. Kobayashi, T. Chinzorig & K. Tsogtbaatar, 2023
Jainosaurus: A.P. Hunt, Lockley, S.G. Lucas & C. Meyer, 1995 (not 1994) [nomen dubium; PSS → Titanosaurus]
Jakapil: F.J. Riguetti, S. Apesteguía & X. Pereda-Suberbiola, 2022 [nomen nudum]
Jaklapallisaurus: F.E. Novas, M.D. Ezcurra, S. Chatterjee & T.S. Kutty, 2011
Janenschia: Wild, 1991
Jaxartosaurus: Riabinin, 1937 [nomen dubium]
Jeholornis: Zhou Z. & Zhang F, 2002 [JSS → Shenzhouraptor; possible bird]
Jeholosaurus: Xu X, Wang X-L & You H-L, 2000
Jenghizkhan: G. Olshevsky vide G. Olshevsky, Ford & Yamamoto, 1995 [JSS → Tarbosaurus]
Jensenosaurus: G. Olshevsky vide B.D. Curtice, K. Stadtman & L.J. Curtice, 1996 [nomen nudum → Ultrasauros; JSS → Supersaurus]
Jeyawati: A.T. McDonald, D.G. Wolfe & J.I. Kirkland, 2010
Jianchangosaurus: Pu H-Y, Y. Kobayashi, Lü J-C, Xu L, Wu Y, Chang H, Zhang J-M & Jia S, 2013
"Jiangjunmiaosaurus": [Anonymous], 1987 [nomen nudum → Monolophosaurus & Sinraptor]
Jiangjunosaurus: Jia C, C.A. Forster (as Foster), Xu X. & J.M. Clark, 2007
Jiangshanosaurus: Tang F, Kang, Jin X, Wei F. & Wu W-T, 2001
Jiangxisaurus: Wei X-F, Pu J-Y, Xu L, Liu D & Lü J-C, 2013
Jiangxititan: Mo J-Y, Fu Q-Y, Yu Y-L & Xu X, 2023
Jianianhualong: Xu X, P.J. Currie, M. Pittman, Xing L, Meng Q, Lü J-C, Hu D. & Yu C, 2017
Jinbeisaurus: Wu X-C, Shi J-R, Dong L-Y, T.D. Carr, Yi J & Xu S-C, 2019
Jinchuanloong: Li N, Zhang X, Ren X, Li D. & You H, 2025
Jinfengopteryx: Ji Q, Ji S, Lü J-C, You H-L, Chen W, Liu Y-Q & Liu Y-X, 2005
Jingiella (was: Jingia; preoccupied by a Moth, 1983): Ren X-X, Wang X-R, Ji Y-N, Guo Z. & Ji Q, 2024
Jingshanosaurus: Zhang Y-H & Yang Z-L, 1995
Jintasaurus: You H-L & Li D-Q, 2009
Jinyunpelta: Zheng W, Jin X-S, Y. Azuma, Wang Q-Y, K. Miyata & Xu X, 2018
Jinzhousaurus: Wang X-L & Xu X, 2001
Jiutaisaurus: Wu W-H, Dong Z-M, Sun Y, Li C. & Li T, 2006
Jixiangornis: Ji Q, Ji S, Zhang H, You H-L, Zhang J-P, Wang L, Yuan & Ji X, 2002 [possible bird]
Joaquinraptor: L.M. Ibiricu, M.C. Lamanna, B.N. Alvarez, I.A. Cerda, J.L. Caglianone, N.V. Cardozo, M. Luna & R.D. Martínez, 2025
Jobaria: P.C. Sereno, Beck, D.B. Dutheil, H.C.E. Larsson, Lyon, Moussa, R.W. Sadleir, C.A. Sidor, D.J. Varricchio, G.P. Wilson & J.A. Wilson, 1999
Jubbulpuria: F. von Huene & C.A. Matley, 1933 [nomen dubium]
Judiceratops: N.R. Longrich, 2013
"Jurassosaurus": Dong Z-M vide Holden, 1992 [nomen nudum → Tianchisaurus]
Juratyrant: S.L. Brusatte & R.B.J. Benson, 2013
Juravenator: Göhlich & L.M. Chiappe, 2006

Kaatedocus: E. Tschopp & O. Mateus, 2012
"Kagasaurus": Hisa, 1988 [nomen nudum]
Kaijiangosaurus: He X, 1984
Kaijutitan (genus, Kaiju Titan, also refers to Japanese movie monsters): L.S. Filippi, L. Salgado & A.C. Garrido, 2019
Kakuru: R.E. Molnar & N.S. Pledge, 1980
Kamuysaurus: Y. Kobayashi, T. Nishimura, R. Takasaki, K. Chiba, A.R. Fiorillo, K. Tanaka, Chinzorig T, T. Sato & K. Sakurai, 2019
Kangnasaurus: Haughton, 1915
Kansaignathus: A.O. Averianov & A.V. Lopatin, 2021
Karongasaurus: Gomani, 2005 [electronically published]
Katepensaurus: L.M. Ibiricu, G.A. Casal, R.N.D. Martínez, M.C. Lamanna, M. Luna & L. Salgado, 2013
"Katsuyamasaurus": Lambert, 1990 [nomen nudum → Fukuiraptor]
Kayentavenator: R. Gay, 2010
Kazaklambia: P.R. Bell & K.S. Brink, 2013
Kelmayisaurus: Dong Z-M, 1973
Kelumapusaura: S. Rozadilla, F. Brissón-Eglí, F.L. Agnolín, A.M. Aranciaga-Rolando & F.E. Novas, 2022
Kemkemia: A. Cau & S. Maganuco, 2009
Kentrosaurus: Hennig, 1915 / Lambe, 1904 → Kentrurosaurus & Doryphorosaurus
Kentrurosaurus: Hennig, 1916 [JOS → Kentrosaurus]
Kerberosaurus: Y.L. Bolotsky & P. Godefroit, 2004
Khaan: J.M. Clark, M.A. Norell & R. Barsbold, 2001
Khankhuuluu: J.T. Voris, D.K. Zelenitsky, Y. Kobayashi, S.P. Modesto, F. Therrien, H. Tsutsumi, Tsogtbaatar C-Z. & K. Tsogtbaatar, 2025
Khetranisaurus: M.S. Malkani, 2006
Kholumolumo: C. Peyre de Fabrègues & R. Allain, 2020
Kholumolumosaurus: F.X. Gauffre, 1996 [nomen ex dissertatione → Kholumolumo]
Khulsanurus: A.O. Averianov & A.V. Lopatin, 2021
Kileskus: A.O. Averianov, S.A. Krasnolutskii & S.V. Ivantsov, 2010
Kinnareemimus: E. Buffetaut, V. Suteethorn & H. Tong, 2009
"Kitadanisaurus": Lambert, 1990 [nomen nudum]
Kittysaurus: Hargreaves, 2001 [nomen nudum → Eotyrannus]
Kiyacursor: A.O. Averianov, P.P. Skutschas, A.A. Atuchin, D.A. Slobodin, O.A. Feofanova & O.N. Vladimirova, 2024
Klamelisaurus: Zhao X, 1993
Kol (genus also refers to foot, köl in Mongolian): A.H. Turner, S.J. Nesbitt & M.A. Norell, 2009
Koleken: D. Pol, M.A. Baiano, D. C̆erný, F.E. Novas, I.A. Cerda & M. Pittman, 2024
Kongonaphon: C.F. Kammerer, S.J. Nesbitt, J.J. Flynn, L. Ranivoharimanana & A.R. Wyss, 2020 [possible basal dinosaur]
Koparion: D. Chure, 1994
Koreaceratops: Lee Y-N, M.J. Ryan & Y. Kobayashi, 2010
Koreanosaurus: H.M. Kim, 1979 [nomen nudum]
Koreanosaurus: Huh, Lee D-G, J.K. Kim, Lim & P. Godefroit, 2010
Koshisaurus: M. Shibata & Y. Azuma, 2015
Kosmoceratops: S.D. Sampson, M.A. Loewen, A.A. Farke, E.M. Roberts, C.A. Forster, J.A. Smith & A.L. Titus, 2010
Kotasaurus: P. Yadagiri, 1988
Koutalisaurus: A. Prieto-Márquez, R. Gaete, Rivas, À. Galobart & Boada, 2006 [PSS → Pararhabdodon]
Kritosaurus: B. Brown, 1910 [nomen dubium; PSS → Anasazisaurus, Gryposaurus, and/or Naashoibitosaurus]

Kritosaurus australis renamed Huallasaurus australis, 2022.

Kryptops: P.C. Sereno & S.L. Brusatte, 2008
Kukufeldia: A.T. McDonald, P.M. Barrett & S.D. Chapman, 2010
Kulceratops: Nessov, 1995
Kulindadromeus: P. Godefroit, S.M. Sinitsa, D. Dhouailly, Y.L. Bolotsky, A.V. Sizov, M.E. McNamara, M.J. Benton & P. Spagna, 2014 [PSS → Daurosaurus or Kulindapteryx]
Kulindapteryx: V.R. Alifanov & S.V. Saveliev, 2014 [PSS → Kulindadromeus]
Kunbarrasaurus: L.G. Leahey, R.E. Molnar, K. Carpenter, L.M. Witmer & S.W. Salisbury, 2015
Kundurosaurus: P. Godefroit, Y.L. Bolotsky & P. Lauters, 2012
Kunmingosaurus: Zhao X. (as Chao S.), 1985
Kuru (genus also refers to a prion disease): J.G. Napoli, A.A. Ruebenstahl, B-A.S. Bhullar, A.H. Turner, & M.A. Norell, 2021
Kurupi: F.V. Iori, H.I. de Araújo-Júnior, S.A. Simionato Tavares, T. da Silva Marinho, A.G. Martinelli, 2021
Kwanasaurus: J.W. Martz & B.J. Small, 2019

Labocania: R.E. Molnar, 1974
Labrosaurus: O.C. Marsh, 1879 [JSS → Allosaurus]
Laelaps: E.D. Cope, 1866 / Koch, 1836 → Drytosaurus

Laelaps macropus renamed Teihivenator macropus, 2017.

Laevisuchus: F. von Huene & C.A. Matley, 1933 [nomen dubium]
Lagerpeton: Romer, 1971
Lagosuchus: Romer, 1971 [nomen dubium]
Laiyangosaurus: Zhang J-L, Wang X-L, Wang Q, Jiang S-X, Cheng X, Li N. & Qiu R, 2017
Lajasvenator: R.A. Coria, P.J. Currie, F. Ortega & M.A. Baiano, 2019
Lamaceratops: V.R. Alifanov, 2003 [PSS → Bagaceratops (adolescent ?)]
Lambeosaurus: Parks, 1923

Lambeosaurus laticaudus renamed Magnapaulia laticaudus, 2012.

Lametasaurus: C.A. Matley, 1923 [nomen dubium]
Lamplughsaura: T.S. Kutty, S. Chatterjee, P.M. Galton & P. Upchurch, 2007
Lanasaurus: Gow, 1975
Lancangosaurus: Zhao X. vide Dong Z-M, Zhou S. & Zhang Y-H, 1983 [nomen nudum → Datousaurus]
Lancanjiangosaurus: Zhao X, 1983 [nomen nudum]
Lanzhousaurus: You H-L, Ji Q & Li D-Q, 2005
Laosaurus: O.C. Marsh, 1878 [nomen dubium]
Lapampasaurus: R.A. Coria, B.J. González-Riga (as González Riga) & S. Casadío, 2012
Laplatasaurus: F. von Huene, 1929
Lapparentosaurus: J.F. Bonaparte, 1986
Laquintasaura: P.M. Barrett, R.J. Butler, R. Mundil, T.M. Scheyer, R.B. Irmis & M.R. Sánchez-Villagra, 2014
Latenivenatrix: A.J. van der Reest & P.J. Currie, 2017 [PSS → Polyodontosaurus, Troödon]
Latirhinus: A. Prieto-Márquez & C.I.S. Brañas, 2012
Lavocatisaurus: J.I. Canudo, J.L. Carballido, A.C. Garrido & L. Salgado, 2018
Leaellynasaura: T. Rich & P. Vickers-Rich (as P. Rich), 1989
Ledumahadi: B.W. McPhee, R.B.J. Benson, J. Botha-Brink, E.M. Bordy & J.N. Choiniere, 2018
Leinkupal (not Leikupal): P.A. Gallina, S. Apesteguía, A. Haluza & J.I. Canale, 2014
Leipsanosaurus: F. Nopcsa, 1918 [PSS → Struthiosaurus]
Lengosaurus: Kelly, 1998 [nomen nudum → Eotyrannus]
Leonerasaurus: D. Pol, A.C. Garrido & I.A. Cerda, 2011
Lepidocheirosaurus: V.R. Alifanov & S.V. Saveliev, 2015 [PSS → Kulindadromeus]
Lepidus: S.J. Nesbitt & M.D. Ezcurra, 2015
Leptoceratops: B. Brown, 1914
Leptorhynchos (genus also refers to a plant): N.R. Longrich, K. Barnes, S. Clark & L. Millar, 2013
Leptospondylus: R. Owen, 1854 [JSS → Massospondylus]
Leshansaurus: Li F, Peng G, Ye Y, Jiang S. & Huang D, 2009
Lesothosaurus: P.M. Galton, 1978 [PSS → Fabrosaurus]
Lessemsaurus: J.F. Bonaparte, 1999
Levnesovia: H-D Sues & A.O. Averianov, 2009
Lewisuchus: Romer, 1972
Lexovisaurus: Hoffstetter, 1957
Leyesaurus: C. Apaldetti, R.N. Martínez, O.A. Alcober & D. Pol, 2011
Liaoceratops: Xu X, P.J. Makovicky, Wang X-L, M.A. Norell & You H-L, 2002
Liaoningosaurus: Xu X, Wang X-L & You H-L, 2001
Liaoningotitan: Zhou C-F, Wu W-H, Sekiya T. & Dong Z-M, 2018
Liaoningvenator: Shen C-Z, Zhao B, Gao C-L, Lü J-C & M. Kundrát, 2017
Liassaurus: Welles, H.P. Powell & Pickering vide Pickering, 1995 [nomen nudum]
Ligabueino: J.F. Bonaparte, 1996
Ligabuesaurus: J.F. Bonaparte, B.J. González-Riga (as González Riga) & S. Apesteguía, 2006
"Ligomasaurus": G. Maier, 2003 [nomen nudum → Giraffatitan]
Lijiagousaurus: Li Z-Q, 2001 [nomen nudum]
Liliensternus: Welles, 1984
Limaysaurus: L. Salgado, A.C. Garrido, S.E. Cocca & J.R. Cocca, 2004
Limnosaurus: F. Nopcsa, 1899 / O.C. Marsh, 1872

Limnosaurus transsylvanicus renamed Telmatosaurus transsylvanicus, 1903.
Limnosaurus transsylvanicus renamed Hecatasaurus transsylvanicus, 1910.

Limusaurus: Xu X, J.M. Clark, J. Mo, J.N. Choiniere, C.A. Forster, G.M. Erickson, D.W.E. Hone, C. Sullivan, D.A. Eberth, S.J. Nesbitt, Zhao Q, R. Hernández-Rivera (as R. Hernandez), Jia C-K, Han F-L, & Guo Y, 2009
Lingwulong: Xu X, P. Upchurch, P.D. Mannion, P.M. Barrett, O.R. Regalado-Fernandez, Mo J-Y, Ma J-F & Liu H-G, 2018
Lingyuanosaurus: Yao X, Liao C-C, C. Sullivan & Xu X, 2019
Linhenykus: Xing X, C. Sullivan, M. Pittman, J.N. Choiniere, D.W.E. Hone, P. Upchurch, Tan Q, Xiao D, Tan L, & Han F, 2011
Linheraptor: Xu X, J.N. Choinere, M. Pittman, Tan Q, Xiao D, Li Z-Q, Tan L, J.M. Clark, M.A. Norell, D.W.E. Hone, & C. Sullivan, 2010 [PSS → Tsaagan]
Linhevenator: Xu X, Tan Q, C. Sullivan, Han F. & Xiao D, 2011
Lirainosaurus: J.L. Sanz, J.E. Powell, J. LeLoeuff, R.D. Martínez & X. Pereda-Suberbiola, 1999
Lishulong: Zhang Q-N, Jia L, Wang T, Zhang Y-G. & You H-L, 2024
Liubangosaurus: Mo J, Xu X. & E. Buffetaut, 2010
Llukalkan: F.A. Gianechini, A.H. Méndez, L.S. Filippi, A. Paulina-Carabajal, R.D. Juárez-Valieri & A.C. Garrido, 2021
Lohuecotitan: V. Díez Díaz, P. Mocho, A. Páramo, F. Escaso, F. Marcos-Fernández, J.L. Sanz & F. Ortega, 2016
Lokiceratops: M.A. Loewen, J.J.W. Sertich, S. Sampson, J.K. O'Connor, S. Carpenter, B. Sisson, A. Øhlenschlæger, A.A. Farke, P.J. Makovicky, N. Longrich & D.C. Evans, 2024
Loncosaurus: F. Ameghino, 1898 [nomen dubium]
Longosaurus: Welles, 1984 [JSS → Coelophysis]
Lophorhothon: W.R. Langston, 1960
Lophostropheus: M.D. Ezcurra & Cuny, 2007
Loricatosaurus: S.C.R. Maidment, D.B. Norman, P.M. Barrett & P. Upchurch, 2008
Loricosaurus: F. von Huene, 1929
Losillasaurus: Casanovas-Cladellas (as Casanovas), Santafe & J.L. Sanz, 2001
Lourinhanosaurus: O. Mateus, 1998
Lourinhasaurus: P. Dantas, J.L. Sanz, C.M. da Silva, F. Ortega, V.F. Dos Santos & M. Cachao, 1998
Luanchuanraptor: Lü J-C, Xu L, Zhang X-L, Ji Q, Jia S, Hu W, Zhang J-M & Wu Y, 2007
Luanpingosaurus: Cheng Z. vide Chen P, 1996 [nomen nudum → Psittacosaurus]
Lucianosaurus: R.N. Martínez & C. Apaldetti, 2017 / A.P. Hunt & S.G. Lucas, 1994 → Lucianovenator
Lucianovenator: R.N. Martínez & C. Apaldetti, 2017
Luckyraptor: [Anonymous], 2007 [nomen nudum]
Lufengocephalus: Yang Z.J. (as Young C.C.), 1974 [JSS → Lufengosaurus]
Lufengosaurus: Yang Z.J. (as Young C.C.), 1941
Lukousaurus: Yang Z.J. (as Young C.C.), 1948
Luoyanggia: Lü J-C, Xu L, Jiang X, Jia S, Li M, Yuan, Zhang X-L & Ji Q, 2009
Luoyangosaurus: Lü J-C, 2009 [nomen nudum → Luoyanggia]
Lurdusaurus: P. Taquet & D.A. Russell, 1999
Lusitanosaurus: de Lapparent & Zbyszewski, 1957
Lusotitan: Telles Antunes & O. Mateus, 2003
Lusovenator: E. Malafaia, P. Mocho, F. Escaso & F. Ortega, 2020
Lutungutali: B.R. Peecook, C.A. Sidor, S.J. Nesbitt, R.M.H. Smith, J.S. Steyer & K.D. Angielczyk, 2013
Lycorhinus: Haughton, 1924
Lythronax: M.A. Loewen, R.B. Irmis, J.J.W. Sertich, P.J. Currie & S.D. Sampson, 2013

Machairasaurus: N.R. Longrich, P.J. Currie & Dong Z-M, 2010
Machairoceratops: E.K. Lund, P.M. O'Connor, M.A. Loewen & Z.A. Jinnah, 2016
Macrocollum: R. Temp Müller, M.C. Langer & S. Dias-da-Silva, 2018
Macrodontophion: A. Zborzewski, 1834 [nomen dubium]
Macrogryphosaurus: J.O. Calvo, J.D. Porfiri & F.E. Novas, 2007
Macrophalangia: C.M. Sternberg, 1932 [JSS → Chirostenotes]
Macrurosaurus: H.G. Seeley, 1876
"Madsenius": Lambert, 1990 [nomen nudum → Allosaurus]
Magnamanus: C. Fuentes-Vidarte, M. Meijide-Calvo, F. Meijide-Fuentes & M. Meijide-Fuentes, 2017
Magnapaulia: A. Prieto-Márquez, L.M. Chiappe & S.H. Joshi, 2012
Magnirostris: You H-L & Dong Z-M, 2003 [PSS → Bagaceratops (adolescent ?)]
Magnosaurus: F. von Huene, 1932
Magulodon: Kranz, 1996 [nomen nudum]
Magyarosaurus: F. von Huene, 1932

Magyarosaurus hungaricus, a chimera, renamed:
Petrustitan hungaricus & Uriash kadici, 2025.

Mahakala (genus also refers to a Buddhist diety): A.H. Turner, D. Pol, J.A. Clarke, G.M. Erickson & M.A. Norell, 2007
Mahuidacursor: P. Cruzado-Caballero, J.M. Gasca, L.S. Filippi, I. Cerda & A.C. Garrido, 2019
Maiasaura: J.R. Horner & Makela, 1979
Maip: A.M. Aranciaga Rolando, M.J. Motta, F.L. Agnolín, M. Manabe, T. Tsuihiji & F.E. Novas, 2022
Majungasaurus: R. Lavocat, 1955
Majungatholus: H-D Sues & P. Taquet, 1979 [JSS → Majungasaurus]
Malarguesaurus: B.J. González-Riga, Previtera & Pirrone, 2009
Malawisaurus: L.L. Jacobs, Winkler, W.R. Downs & Gomani, 1993
Maleevosaurus: K. Carpenter, 1992 [JSS → Tarbosaurus]
Maleevus: T.A. Tumanova, 1987 [nomen dubium]
Malefica: A. Prieto-Márquez & J.R. Wagner, 2022 (announced), 2023 (published)
Maleriraptor: M.D. Ezcurra, M.S. Garcia, F.E. Novas, R.T. Müller, F.L. Agnolín & S. Chatterjee, 2025
Mamenchisaurus: Yang Z.J. (as Young C.C.), 1954
Mandschurosaurus: Riabinin, 1930 [nomen dubium; PSS → Amurosaurus or Charonosaurus]

Mandschurosaurus mongoliensis renamed Gilmoreosaurus mongoliensis, 1979.

Manidens: D. Pol, O.W.M. Rauhut & M. Becerra, 2011
Manipulonyx: A.O. Averianov, A.V. Lopatin & A.A. Atuchin, 2025
Manospondylus: E.D. Cope, 1892 [nomen dubium; PSS → Tyrannosaurus]
Mansourasaurus: H.M. Sallam, E. Gorscak, P.M. O'Connor, I.A. El-Dawoudi, S. El-Sayed, S. Saber, M.A. Kora, J.J.W. Sertich, E.R. Seiffert & M.C. Lamanna, 2018
Mantellisaurus: G.S. Paul, 2006
Mantellodon: G.S. Paul, 2012
Maojandino: M.S. Malkani, 2016
Mapusaurus: R.A. Coria & P.J. Currie, 2006
Maraapunisaurus: K. Carpenter, 2018
Marasuchus: P.C. Sereno & A.B. Arcucci, 1994
Marisaurus: M.S. Malkani, 2006
Marmarospondylus: R. Owen, 1875 [nomen dubium]
Marshosaurus: J.H. Madsen, 1976
Martharaptor: P. Senter, J.I. Kirkland & D.D. DeBlieux, 2012
Masiakasaurus: S.D. Sampson, Carrano & C.A. Forster, 2001
Massospondylus: R. Owen, 1854
Matheronodon: P. Godefroit, G. Garcia, B. Gomez, K. Stein, A. Cincotta, U. Lefèvre & X. Valentin, 2017
Maxakalisaurus: A.W.A. Kellner, D.A. Campos, Azevedo, Trotta, Henriques, Craik & H.P. Silva, 2006
Mbiresaurus: C.T. Griffin, B.M. Wynd, D. Munyikwa, T.J. Broderick, M. Zondo, S. Tolan, M.C. Langer, S.J. Nesbitt & H.R. Taruvinga, 2022
Medusaceratops: M.J. Ryan, A.P. Russell & Hartman, 2010
Megacervixosaurus: Zhao X, 1983 [nomen nudum]
Megadactylus: E. Hitchcock, 1865 / L.J. Fitzinger, 1843 → Amphisaurus
"Megadontosaurus": B. Brown vide J.H. Ostrom, 1970 [nomen nudum → Deinonychus & Microvenator]
Megalosaurus: W. Buckland, 1824

Megalosaurus saharicus renamed Carcharodontosaurus saharicus, 1931.

Megapnosaurus: Ivie, Slipinski & Wegrzynowicz, 2001 [JSS → Coelophysis]
Megaraptor: F.E. Novas, 1998
Mei: Xu X, & M.A. Norell, 2004
Melanorosaurus: Haughton, 1924

Melanorosaurus thabanensis renamed Meroktenos thabanensis, 2016.

Mendozasaurus: B.J. González-Riga (as González Riga), 2003
Menefeeceratops: S.G. Dalman, S.G. Lucas, S.E. Jasinski, A.J. Lichtig & P. Dodson, 2021
Menucocelsior: M. Aranciaga Rolando, M.A. Cerroni, J.A. García-Marsà, F.L. Agnolín, M.J. Motta, S. Rozadilla, F. Brissón Eglí & F.E. Novas, 2021 (announced), 2022 (final publication)
Meraxes: J.I. Canale, S. Apesteguía, P.A. Gallina, J. Mitchell, N.D. Smith, T.M. Cullen, A. Shinya, A. Haluza, F.A. Gianechini & P.J. Makovicky, 2022
Mercuriceratops: M.J. Ryan, D.C. Evans, P.J. Currie & M.A. Loewen, 2014
Meroktenos: C.P. de Fabrègues & R. Allain, 2016
Merosaurus: Welles, H.P. Powell & Pickering vide Pickering, 1995 [nomen nudum]
Metriacanthosaurus: A.D. Walker, 1964
Mexidracon: C.I. Serrano-Brañas, B. Espinosa-Chávez, C. de León-Dávila, S.A. Maccracken, D. Barrera-Guevara, E. Torres-Rodríguez, & A. Prieto-Márquez, 2025
Microcephale: P.C. Sereno, 1997 [nomen nudum]
Microceratops: B. Bohlin, 1953 / Seyrig, 1952 → Microceratus
Microceratus: O. Mateus, 2008 [nomen dubium]
Microcoelus: R. Lydekker, 1893 [nomen dubium; PSS → Saltasaurus]
Microdontosaurus: Zhao X, 1983 [nomen nudum]
Microhadrosaurus: Dong Z-M, 1979 [nomen dubium]
Micropachycephalosaurus: Dong Z-M, 1978
Microraptor: Xu X, Zhou Z. & Wang X-L, 2000
Microsaurops: Kuhn, 1963 [JOS → Microcoelus]
Microvenator: J.H. Ostrom, 1970
Mierasaurus: R. Royo-Torres, P. Upchurch, J.I. Kirkland, D.D. DeBlieux, J.R. Foster, A. Cobos & L. Alcalá, 2017
"Mifunesaurus": Hisa, 1985 [nomen nudum]
Migmanychion: Wang X, Cau A, Wang Z-D, Yu K-F, Wu W-H, Wang Y. & Liu Y-C, 2023
Minimocursor: S. Manitkoon, U. Deesri, B. Khalloufi, T. Nonsrirach, V. Suteethorn, P. Chanthasit, W. Boonla & E. Buffetaut, 2023
Minmi: R.E. Molnar, 1980 [nomen dubium]
Minotaurasaurus: C.A. Miles & C.J. Miles, 2009 [PSS → Tarchia]
Minqaria: N.R. Longrich, X. Pereda-Suberbiola, N. Bardet & N-E. Jalil, 2024
Miragaia: O. Mateus, S.C.R. Maidment & N.A. Christiansen, 2009 [JSS → Dacentrurus]
Mirischia: D. Naish, D.M. Martill & Frey, 2004
Mnyamawamtuka: E. Gorscak & P.M. O'Connor, 2019
Moabosaurus: B.B. Britt, R.D. Scheetz, M.F. Whiting & D.R. Wilhite, 2017
Mochlodon: H.G. Seeley, 1881
"Mohammadisaurus": G. Maier, 2003 [nomen nudum → Tornieria]
Mojoceratops: N.R. Longrich, 2010 [PSS → Eoceratops or Chasmosaurus]
Mongolosaurus: C.W. Gilmore, 1933 [nomen dubium]
Mongolostegus: T.A. Tumanova & V.R. Alifanov, 2018
Monkonosaurus: Zhao X. vide Dong Z-M, 1990
Monoclonius: E.D. Cope, 1876 [nomen dubium; PSS → Centrosaurus or Styracosaurus]
Monolophosaurus: Zhao X. & P.J. Currie, 1994 (not 1993)
Mononychus: A. Perle, M.A. Norell, L.M. Chiappe & J.M. Clark, 1993 / Schueppel, 1824 → Mononykus
Mononykus: A. Perle, M.A. Norell, L.M. Chiappe & J.M. Clark, 1993
Montanoceratops: C.M. Sternberg, 1951
Morelladon: J.M. Gasulla, F. Escaso, I. Narváez, F. Ortega & J.L. Sanz, 2015
Morinosaurus: H.E. Sauvage, 1874 [nomen dubium; PSS → Pelorosaurus]
Moros: L.E. Zanno, R.T. Tucker, A. Canoville, H.M. Avrahami, T.A. Gates & P.J. Makovicky, 2019
Morosaurus: O.C. Marsh, 1878 [JSS → Camarasaurus]
Morrosaurus: S. Rozadilla, F.L. Agnolín, F.E. Novas, A.M. Aranciaga Rolando, M.J. Motta, J.M. Lirio & M.P. Isasi, 2015
Mosaiceratops: Zheng W-J, Jin X-S & Xu X, 2015
"Moshisaurus": Hisa, 1985 [nomen nudum → Mamenchisaurus]
"Mtapaiasaurus": G. Maier, 2003 [nomen nudum → Giraffatitan]
"Mtotosaurus": G. Maier, 2003 [nomen nudum → Dicraeosaurus]
Murusraptor: R.A. Coria & P.J. Currie, 2016
Musankwa: P.M. Barrett, K.E.J. Chapelle, L. Sciscio, T.J. Broderick, M. Zondo, D. Munyikwa & J.N. Choiniere, 2024
Mussaurus: J.F. Bonaparte & Vince, 1979
Muttaburrasaurus: Bartholomai & R.E. Molnar, 1981
Muyelensaurus: J.O. Calvo, B.J. González-Riga & J.D. Porfiri, 2007
Mymoorapelta: J.I. Kirkland & K. Carpenter, 1994

Naashoibitosaurus: A.P. Hunt & S.G. Lucas, 1993 [PSS → Gryposaurus or Kritosaurus]
Nambalia: F.E. Novas, M.D. Ezcurra, S. Chatterjee & T.S. Kutty, 2011
Nankangia: Lü J-C, Yi L-P, Zhong H. & Wei X-F, 2013
Nanningosaurus: Mo, Zhao Z, Wang W. & Xu X, 2007
"Nanoraptor": David Grimaldi vide Nicholas St. Fleur, 2017 [nomen nudum; in New York Times]
Nanosaurus: O.C. Marsh, 1877
Nanotyrannus: R.T. Bakker, Williams & P.J. Currie, 1988
Nanshiungosaurus: Dong Z-M, 1979
Nanuqsaurus: A.R. Fiorillo & R.S. Tykoski, 2014
Nanyangosaurus: Xu X, Zhao X, Lü J-C, Huang W, Li Z-Y & Dong Z-M, 2000
Napaisaurus: Ji S-A & Zhang P, 2021 (announced), 2022 (final publication)
Narambuenatitan: L.S. Filippi, R.A. García & A.C. Garrido, 2010
Narindasaurus: R. Royo-Torres, A. Cobos, P. Mocho & L. Alcalá, 2020
Nasutoceratops: S.D. Sampson, E.K. Lund, M.A. Loewen, A.A. Farke & K.E. Clayton, 2013
Nasutuceratops: E.K. Lund, 2010 [nomen ex dissertatione → Nasutoceratops]
Natovenator: Lee S-J, Lee Y-N, P.J. Currie, R. Sissons, Park J-Y, Kim S-H, R. Barsbold & Tsogtbaatar K, 2022
Natronasaurus: R.E. Ulansky, 2014 [SSS → Alcovasaurus]
Navajoceratops: D.W. Fowler & E.A. Freedman Fowler, 2020
Nebulasaurus: Xing L, T. Miyashita, P.J. Currie, You H-L & Dong Z, 2013
Nectosaurus: Versluys, 1910 / Merriam, 1905 → Kritosaurus
Nedcolbertia: J.I. Kirkland, B.B. Britt, Whittle, S.K. Madsen & Burge, 1998
Nedoceratops: Ukrainsky, 2007 [PSS → Triceratops]
Neimongosaurus: Zhang X-H, Xu X, Zhao X, P.C. Sereno, Kuang & Tan L, 2001
Nemegtia: Lü J-C, Tomida, Y. Azuma, Dong Z-M & Lee Y-N, 2004 / Szczechura, 1978 → Nemegtomaia
Nemegtonykus: Lee S-J, Park J-Y, Lee Y-N, Kim S-H, Lü J-C, R. Barsbold & Tsogtbaatar K, 2019
Nemegtomaia: Lü J-C, Tomida, Y. Azuma, Dong Z-M & Lee Y-N, 2005
Nemegtosaurus: Nowinski, 1971
Neosaurus: C.W. Gilmore vide C.W. Gilmore & D.R. Stewart, 1945 / F. Nopcsa, 1923

Neosaurus missouriensis renamed Parrosaurus missouriensis, 1945.

Neosodon: M. de la Moussaye, 1885
Neovenator: S. Hutt, D.M. Martill & Barker, 1996
Neuquenraptor: F.E. Novas & D. Pol, 2005 [PSS → Unenlagia]
Neuquensaurus: J.E. Powell, 1992
Nevadadromeus: J.W. Bonde, R.L. Hall, L.J. Krumenacker & D.J. Varricchio, 2022
Newtonsaurus: Welles vide Welles & Pickering, 1999 [nomen nudum]
Newtonsaurus: O. Evans, C. Howells, N. Wintle & M.J. Benton, 2025
Ngexisaurus: Zhao X, 1983 [nomen nudum]
Ngwevu: K.E.J. Chapelle, P.M. Barrett, J. Botha & J.N. Choiniere, 2019
Nhandumirim: J.C.A. Marsola, J.S. Bittencourt, R.J. Butler, A.A.S. Da Rosa. J.M. Sayão & M.C. Langer, 2019
Nicksaurus: M.S. Malkani, 2016
Niebla: M. Aranciaga Rolando, M.A. Cerroni, J.A. García-Marsà, F.L. Agnolín, M.J. Motta, S. Rozadilla, F. Brissón Eglí & F.E. Novas, 2020
Nigersaurus: P.C. Sereno, Beck, D.B. Dutheil, H.C.E. Larsson, Lyon, Moussa, R.W. Sadleir, C.A. Sidor, D.J. Varricchio, G.P. Wilson & J.A. Wilson, 1999
Ningyuansaurus: Ji Q, Lü J-C, Wei X-F. & Wang X-R, 2012
Ninjatitan: P.A. Gallina, J.I. Canale & J.L. Carballido, 2021
Niobrarasaurus: K. Carpenter, Dilkes & D.B. Weishampel, 1995
Nipponosaurus: Nagao, 1936
Noasaurus: J.F. Bonaparte & J.E. Powell, 1980
Nodocephalosaurus: R. Sullivan, 1999
Nodosaurus: O.C. Marsh, 1889
Nomingia: R. Barsbold, H. Osmólska, M. Watabe, P.J. Currie & Tsogtbaatar K, 2000
Nopcsaspondylus: S. Apesteguía, 2007
Normanniasaurus: J. LeLoeuff, S. Suteethorn & E. Buffetaut
Notatesseraeraptor: M. Zahner & W. Brinkmann, 2019
Nothronychus: J.I. Kirkland & Wolfe, 2001
Notoceratops: A. Tapia, 1918 [nomen dubium]
Notocolossus: B.J. González Riga, M.C. Lamanna, L.D. Ortiz David, J.O. Calvo & J.P. Coria, 2016
Notohypsilophodon: R.D. Martínez, 1998
Nototyrannus: [Anonymous] 2011 vide S. Apesteguía, N.D. Smith, R.D. Juárez-Valieri & P.J. Makovicky, 2016 [nomen nudum → Gualicho]
Nqwebasaurus: W.J. de Klerk, C.A. Foster, S.D. Sampson, A. Chinsamy & C.F. Ross, 2000
"Nteregosaurus": G. Maier, 2003 [nomen nudum → Janenschia]
Nullotitan: F.E. Novas, F.L. Agnolín, S. Rozadilla, A.M. Aranciaga-Rolando, F. Brissón-Eglí, M.J. Motta, M.A. Cerroni, M.D. Ezcurra, A.G. Martinelli, J.S. D'Angelo, G. Álvarez-Herrera, A.R. Gentil, S. Bogan, N.R. Chimento, J.A. García-Marsà, G. Lo Coco, S.E. Miquel, F.F. Brito, E.I. Vera, V.S. Perez Loinaze, M.S. Fernández & L. Salgado, 2019
Nuoersaurus: Dong Z-M & Li X-M, 1991 [nomen nudum; later spelled Nuoerosaurus & Nurosaurus but neither formally described nor named]
Nuthetes: R. Owen, 1854
Nyasasaurus: A.J. Charig, 1967 vide S.J. Nesbitt, P.M. Barrett, S. Werning, C.A. Sidor & A.J. Charig, 2012
"Nyororosaurus": G. Maier, 2003 [nomen nudum → Dicraeosaurus]

Obelignathus: Ł. Czepiński & D. Madzia, 2025
Oblitosaurus: S. Sánchez-Fenollosa, F.J. Verdú & A. Cobos, 2023
Oceanotitan: P. Mocho, R. Royo-Torres & F. Ortega, 2019
Ohmdenosaurus: Wild, 1978
Ojoceratops: R. Sullivan & S.G. Lucas, 2010
Ojoraptorsaurus: R.M. Sullivan, S.E. Jasinski & M.P.A. Van Tomme, 2011
Oksoko: G.F. Funston, Chinzorig T, Tsogtbaatar K, Y. Kobayashi, C. Sullivan & P.J. Currie, 2020
Oligosaurus: H.G. Seeley, 1881 [nomen dubium; PSS → Rhabdodon]
Olorotitan: P. Godefroit, Y.L. Bolotsky & V.R. Alifanov, 2003
Omeisaurus: Yang Z.J. (as Young C.C.), 1939
Omnivoropteryx: Czerkas & Ji Q, 2002
Omosaurus: R. Owen, 1875 / J. Leidy, 1856 → Dacentrurus

Omosaurus armatus renamed Dacentrusrus armatus, 1902.
Omosaurus durobrivensis renamed Lexovisaurus durobrivensis, 1957.
Omosaurus vetustus renamed Eoplophysis vetustus, 2014.

Ondogurvel: A.O. Averianov & A.V. Lopatin, 2022
Onychosaurus: F. Nopcsa, 1902 [nomen dubium; PSS → Rhabdodon]
Oohkotokia: P. Penkalski, 2013 [published in 2014; PSS → Scolosaurus]
Opisthocoelicaudia: Borsuk-Bialynicka, 1977 [PSS → Nemegtosaurus]
Oplosaurus: P. Gervais, 1852 [nomen dubium; PSS → Pelorosaurus]
Orcomimus: Triebold, 1997 [nomen nudum]
Orinosaurus: R. Lydekker, 1889 [JOS → Orosaurus]
Orkoraptor: F.E. Novas, M.D. Ezcurra & A. Lecuona, 2008
Ornatops: A.T. McDonald, D.G. Wolfe, E.A. Freedman Fowler & T.A. Gates, 2021
Ornatotholus: P.M. Galton & H-D Sues, 1983 [JSS → Stegoceras]
Ornithodesmus: H.G. Seeley, 1887
Ornithoides: H.F. Osborn, 1924 [nomen nudum → Saurornithoides]
Ornitholestes: H.F. Osborn, 1903
Ornithomerus: H.G. Seeley, 1881 [JSS → Rhabdodon]
Ornithomimoides: F. von Huene & C.A. Matley, 1933 [nomen dubium]
Ornithomimus: O.C. Marsh, 1890

Ornithomimus elegans renamed Citipes elegans, 2020.

Ornithopsis: H.G. Seeley, 1870 [nomen dubium]

Ornithopsis greppini renamed Amanzia greppini, 2020.

Ornithotarsus: E.D. Cope, 1869 [nomen dubium; PSS → Hadrosaurus]
Orodromeus: J.R. Horner & D.B. Weishampel, 1988
Orosaurus: T.H. Huxley, 1867 [JSS → Euskelosaurus]
Orthogoniosaurus: Das-Gupta, 1931 [nomen dubium]
Orthomerus: H.G. Seeley, 1883 [nomen dubium; PSS → Telmatosaurus]

Orthomerus weberae renamed Riabininohadros weberae, 2020.

Oryctodromeus: D.J. Varricchio, A.J. Martin & Katsura, 2007
Oshanosaurus: Zhao X. (as Chao S.), 1985 [nomen nudum]
Osmakasaurus: A.T. McDonald, 2011
Ostafrikasaurus: E. Buffetaut, 2012 [PSS → Spinosaurus]
Othnielia: P.M. Galton, 1977 [PSS → Nanosaurus]
Othnielosaurus: P.M. Galton, 2006 [PSS → Nanosaurus]
Otogosaurus: Zhao X. & Tan L, 2004 [citation not seen, author's name(s) may change]
Ouranosaurus: P. Taquet, 1976
Overoraptor: M.J. Motta, F.L. Agnolín, F. Brissón-Eglí & F.E. Novas, 2020
Overosaurus: R.A. Coria, L.S. Filippi, L.M. Chiappe, R.A. García & A.B. Arcucci, 2013
Oviraptor: H.F. Osborn, 1924
Ovoraptor: H.F. Osborn, 1924 [nomen nudum → Velociraptor]
Owenodon: P.M. Galton, 2009
Oxalaia: A.W.A. Kellner, Azevedo, E.B. Machado, L.B. Carvalho & Henriques, 2011 [PSS → Spinosaurus]
Ozraptor: J.A. Long & R.E. Molnar, 1998

Pachycephalosaurus: B. Brown & E.M. Schlaikjer, 1943
Pachyrhinosaurus: C.M. Sternberg, 1950
Pachysauriscus: Kuhn, 1959 [nomen dubium; PSS → Plateosaurus]
Pachysaurops: F. von Huene, 1961 (not 1959) [JOS → Pachysauriscus]
Pachysaurus: F. von Huene, 1908 / L.J. Fitzinger, 1843 → Pachysauriscus
Pachyspondylus: R. Owen, 1854 [JSS → Massospondylus]
Padillasaurus: J.L. Carballido, D. Pol, M.L. Parra Ruge, S. Padilla Bernal, M.E. Páramo-Fonseca & F. Etayo-Serna, 2015
Pakisaurus: M.S. Malkani, 2006
Palaeopteryx: J.A. Jensen, 1981
Palaeoscincus: J. Leidy, 1856 [nomen dubium; PSS → Edmontonia or Panoplosaurus]

Palaeoscincus africanus renamed Paranthodon africanus, 1929.

Paludititan: Z. Csiki, V. Codrea, C. Jipa-Murzea & P. Godefroit, 2010
Paluxysaurus: Rose, 2007 [electronically published; PSS → Sauroposeidon]
Pampadromaeus: S.F. Cabreira, C.L. Schultz, J.S. Bittencourt, M.B. Soares, D.C. Fortier, L.R. Silva & M.C. Langer, 2011
Pamparaptor: J.D. Porfiri, J.O. Calvo & D. Dos Santos, 2011
Panamericansaurus: J.O. Calvo & J.D. Porfiri, 2010
Pandoravenator: O.W.M. Rauhut & D. Pol, 2017
Panguraptor: You H-L, Y. Azuma, Wang T, Wang Y-M & Dong Z-M, 2014
Panoplosaurus: Lambe, 1919
Panphagia: R.N. Martínez & O.A. Alcober, 2009
Pantydraco: P.M. Galton, A.M. Yates & D. Kermack, 2007
Papiliovenator: Pei R, Qin Y-Y, Wen A-S, Zhao Q, Wang Z, Liu Z-M, Guo W-L, Liu P, Ye W-M, Wang L-Y, Yin Z-G, Dai R-M & Xu X, 2021 (announced), 2022 (final publication)
Paraiguanodon: B. Brown vide G. Olshevsky, 1991 [nomen nudum → Bactrosaurus]
Paralitherizinosaurus: Y. Kobayashi, R. Takasaki, A.R. Fiorillo, Tsogtbaatar C. & Y. Hikida, 2022
Paralititan: J.B. Smith, M.C. Lamanna, K.J. Lacovara, P. Dodson, J.R. Smith, J.C. Poole, R. Giegengack & Attia, 2001
Paranthodon: F. Nopcsa, 1929
Pararhabdodon: Casanovas-Cladellas, Santafé-Llopis & Isidro-Llorens, 1993
Parasaurolophus: Parks, 1922
Paraxenisaurus: C.I. Serrano-Brañas, B. Espinosa-Chávez, S.A. Maccracken, C. Gutiérrez-Blando, C. deLeón-Dávila & J. Flores Ventura, 2020
Pareisactus: J. Párraga & A. Prieto-Márquez, 2019
Parksosaurus: C.M. Sternberg, 1937
Paronychodon: E.D. Cope, 1876 [nomen dubium]
Parrosaurus: C.W. Gilmore, 1945 [nomen dubium; PSS → Hypsibema]

Parrosaurus missouriensis renamed Hypsibema missouriensis, 1945.

Parvicursor: Karhu & Rautian, 1996
Patagonykus: F.E. Novas, 1996
Patagopelta: F. Riguetti, X. Pereda-Suberbiola, D. Ponce, L. Salgado, S. Apesteguía, S. Rozadilla & V. Arbour, 2022
Patagosaurus: J.F. Bonaparte, 1979
Patagotitan: J.L. Carballido, D. Pol, A. Otero, I.A. Cerda, L. Salgado, A.C. Garrido, J. Ramezani, N.R. Cúneo & J.M. Krause, 2017
Paulodon: F. Sancarlo, D. Mandorlo & T.L. Ford, 2025
Pawpawsaurus: Lee Y-N, 1996
Pectinodon: K. Carpenter, 1982
Pedopenna: Xu X. & Zhang F, 2005
Pegomastax: P.C. Sereno, 2012
Peishansaurus: B. Bohlin, 1953 [nomen dubium]
Pelecanimimus: Perez-Moreno, J.L. Sanz, Buscalioni, Moratalla, F. Ortega & Rasskin-Gutman, 1994
Pellegrinisaurus: L. Salgado, 1996
Peloroplites: K. Carpenter, J.A. Bartlett, J. Bird & Barrick, 2008
Pelorosaurus: G. Mantell, 1850

Pelorosaurus becklesii renamed Haestasaurus becklesii, 2015.

Peltosaurus: B. Brown vide D. Chure & McIntosh, 1989 (see also Glut, 1972) / E.D. Cope, 1873 → Sauropelta
Pendraig: S.N.F. Spiekman, M.D. Ezcurra, R.J. Butler, N.C. Fraser & S.C.R. Maidment, 2021
Penelopognathus: P. Godefroit, Li Hong & Shang C-Y, 2005
Pentaceratops: H.F. Osborn, 1923
Perijasaurus: A.F. Rincón, D.A. Raad Pájaro, H.F. Jiménez Velandia, M.D. Ezcurra & J.A. Wilson Mantilla, 2022
Petrobrasaurus: L.S. Filippi, J.I. Canudo, L. Salgado, A.C. Garrido, R.A. García, I.A. Cerda & A. Otero, 2011
Petrustitan: V. Díez Díaz, P.D. Mannion, Z. Csiki-Sava & P. Upchurch, 2025 [type species is "Magyarosaurus" hungaricus, von Huene, 1932]
Phaedrolosaurus: Dong Z-M, 1973
Philovenator: Xu X, Zhao Q, C. Sullivan, Tan Q-W, P.M. Sander & Ma Q-Y, 2012
Phuwiangosaurus: V. Martin, E. Buffetaut & V. Suteethorn, 1994
Phuwiangvenator: A. Samathi, P. Chanthasit & P.M. Sander, 2019
Phyllodon: Thulborn, 1973
Piatnitzkysaurus: J.F. Bonaparte, 1979
Pilmatueia: R.A. Coria, G.J. Windholz, F. Ortega & P.J. Currie, 2018
Pinacosaurus: C.W. Gilmore, 1933
Pisanosaurus: Casamiquela, 1967
Pitekunsaurus: L.S. Filippi & A.C. Garrido, 2008
Piveteausaurus: P. Taquet & Welles, 1977
Planicoxa: DiCroce & K. Carpenter, 2001
Plateosauravus: F. von Huene, 1932 [JSS → Euskelosaurus]
Plateosaurus: von Meyer, 1837
Platyceratops: V.R. Alifanov, 2003 [PSS → Bagaceratops (adolescent ?)]
Platypelta: P. Penkalski, 2018
Platytholus: J.R. Horner, M.B. Goodwin & D.C. Evans, 2023
Plesiohadros: Tsogtbaatar K, D.B. Weishampel, D.C. Evans & M. Watabe, 2014
Pleurocoelus: O.C. Marsh, 1888
Pleuropeltus: H.G. Seeley, 1881 [nomen dubium; PSS → Struthiosaurus]
Pneumatoraptor: Ösi A, S. Apesteguía & Kowalewski, 2010
Podischion: B. Brown & Kaisen, 1911 vide L. Dingus & M.A. Norell, 2010
Podokesaurus: Talbot, 1911 [JSS → Coelophysis]
Poekilopleuron: J.A. Eudes-Deslongchamps, 1838
Polacanthoides: F. Nopcsa, 1928 [PSS → Hylaeosaurus]
Polacanthus: R. Owen vide [Anonymous], 1865

Polacanthus rudgwickensis renamed Horshamosaurus rudgwickensis, 2015.

Polyodontosaurus: C.W. Gilmore, 1932 [nomen dubium; PSS → Latenivenatrix, Stenonychosaurus, Troödon]
Polyonax: E.D. Cope, 1874 [JSS → Triceratops]
Ponerosteus: G. Olshevsky, 2000 [nomen dubium]
Portellsaurus: A. Santos-Cubedo, C. deSantisteban, B. Poza & S. Meseguer, 2021
Powellvenator: M.D. Ezcurra, 2017
Pradhania: T.S. Kutty, S. Chatterjee, P.M. Galton & P. Upchurch, 2007
Prenocephale: T. Maryanska & H. Osmólska, 1974
Prenoceratops: Chinnery, 2004
Priconodon: O.C. Marsh, 1888 [nomen dubium]
Priodontognathus: H.G. Seeley, 1875 [nomen dubium]
Proa: A.T. McDonald, E. Espílez, L. Mampel, J.I. Kirkland & L. Alcalá, 2012
Probactrosaurus: Rozhdestvensky, 1966

Probactrosaurus mazongshanensis renamed Gongpoquansaurus mazongshanensis, 2014.

"Probarodiplodocus": Fuller, 2009 [nomen nudum]
Probrachylophosaurus: E.A. Freedman Fowler & J.R. Horner, 2015
Proceratops: Lull, 1906 [JOS → Ceratops]
Proceratosaurus: F. von Huene, 1926
Procerosaurus: Fritsch, 1905 / F. von Huene, 1902 → Ponerosteus
Procheneosaurus: Matthew, 1920 [JSS → Lambeosaurus]

Procheneosaurus convincens renamed Kazaklambia convincens, 2013.

Procompsognathus: E. Fraas, 1913
Prodeinodon: H.F. Osborn, 1924 [nomen dubium]
Proiguanodon: van den Broeck, 1900 [nomen nudum → Iguanodon]
Propanoplosaurus: R. Stanford, D.B. Weishampel & V.B. Deleon, 2011
Proplanicoxa: K. Carpenter & Y. Ishida, 2010 [PSS → Mantellisaurus]
Prosaurolophus: B. Brown, 1916
Protarchaeopteryx: Ji Q. & Ji S, 1997
Protathlitis: A. Santos-Cubedo,C. de Santisteban, B. Poza & S. Meseguer, 2023
Protiguanodon: H.F. Osborn, 1923 [JSS → Psittacosaurus]
Protoavis: S. Chatterjee, 1991
Protoceratops: Granger & Gregory, 1923
Protognathosaurus: G. Olshevsky, 1991
Protognathus: Zhang Y-H, 1988 / Basilewsky, 1950 → Protognathosaurus
Protohadros: Head, 1998
Protorosaurus: Lambe, 1914 / H. von Meyer, 1830 → Chasmosaurus
Protrachodon: F. Nopcsa, 1923 [nomen nudum → Orthomerus]
Proyandusaurus: F. Knoll, 1999
Pseudolagosuchus: A.B. Arcucci, 1987
Psittacosaurus: H.F. Osborn, 1923
Pteropelyx: E.D. Cope, 1889 [nomen dubium]
Pterospondylus: Jaekel, 1913 [PSS → Procompsognathus]
Puertasaurus: F.E. Novas, L. Salgado, J.O. Calvo & F.L. Agnolín, 2005
Pukyongosaurus: Dong Z-M, Paik & H.J. Kim, 2001
Pulanesaura: B.W. McPhee, M.F. Bonnan, A.M. Yates, J. Neveling & J.N. Choiniere, 2015
Pulaosaurus: Yang Y-F, J.L. King & Xu X, 2025
Punatitan: E.M. Hechenleitner, L. Leuzinger, A.G. Martinelli, S. Rocher, L.E. Fiorelli, J.R.A. Taborda & L. Salgado, 2020
Pycnonemosaurus: A.W.A. Kellner & D.A. Campos, 2002
Pyroraptor: R. Allain & P. Taquet, 2000

Qantassaurus: T. Rich & P. Vickers-Rich, 1999
Qianjiangsaurus: Dai H, Ma Q-Y, Xiong C, Lin Y, Zeng H, Tan C, Wang J, Zhang Y-G & Xing H, 2024 (announced), 2025 (published)
Qianlong: Han F, Yu Y, Zhang S, Zeng R, Wang X, Cai H, Wu T, Wen Y, Cai S, Li C, Wu R, Zhao W. & Xu X, 2023
Qianzhousaurus: Lü J-C, Yi L, S.L. Brusatte, Yang L, Li Hua & Chen L, 2014
Qiaowanlong: You H-L & Li D-Q, 2009
Qijianglong: Xing L, T. Miyashita, Zhang J-P, Li D-Q, Ye Y, T. Sekiya, Wang F-P & P.J. Currie, 2015
Qingxiusaurus: Mo, Huang C, Zhao Z, Wang W. & Xu X, 2008
Qinlingosaurus: Xue, Zhang Y-X, Bi, Yue & Chen D, 1996
Qiupalong: Xu L, Y. Kobayashi, Lü J-C, Lee Y-N, Liu Y-Q, Tanaka, Zhang X-L, Jia S. & Zhang J-M, 2011
Qiupanykus: Lü J-C, Xu L, Chang H-L, Jia S-H, Zhang J-M, Gao D-S, Zhang Y-Y, Zhang C-J & Ding F, 2018
Quaesitosaurus: A. Bannikov & S.M. Kurzanov vide S.M. Kurzanov & A. Bannikov, 1983
Quetecsaurus: B.J. González-Riga (as González Riga) & L. Ortiz David, 2014
Quilmesaurus: R.A. Coria, 2001
Qunkasaura: P. Mocho, F. Escaso, F. Marcos-Fernández, A. Páramo, J.L. Sanz, D. Vidal & F. Ortega, 2024

Rahiolisaurus: F.E. Novas, S. Chatterjee, D.K. Rudra & P.M. Datta, 2010
Rahona (genus also refers to a moth): C.A. Forster, S.D. Sampson, L.M. Chiappe & D.W. Krause, 1998 / Griveaud, 1975 → Rahonavis
Rahonavis: C.A. Forster, S.D. Sampson, L.M. Chiappe & D.W. Krause, 1998
Rajasaurus: J.A. Wilson, P.C. Sereno, S. Srivastava, D.K. Bhatt, A. Khosla & A. Sahni, 2003
Rapator: F. von Huene, 1932 [nomen dubium]
Rapetosaurus: K.C. Rogers & C.A. Forster, 2001
Raptorex: P.C. Sereno, Tan L, S.L. Brusatte, H.J. Kriegstein, Zhao X. & K. Cloward, 2009
Ratchasimasaurus: M. Shibata, P. Jintasakul & Y. Azuma, 2011
Rativates: B. McFeeters, M.J. Ryan, C. Schröder-Adams & T.M. Cullen, 2016
Rayososaurus: J.F. Bonaparte, 1996
Rebbachisaurus: R. Lavocat, 1954
Regaliceratops: C.M. Brown & D.M. Henderson, 2015
Regnosaurus: G. Mantell, 1848
Revueltoraptor: A.P. Hunt, 1994 vide S.J. Nesbitt, R.B. Irmis & Parker, 2007 [nomen ex dissertatione → Gojirasaurus]
Rhabdodon: Matheron, 1869

Rhabdodon septimanicus renamed Obelignathus septimanicus, 2025.

Rhadinosaurus: H.G. Seeley, 1881 [nomen dubium]
Rhinorex: T.A. Gates & R. Scheetz, 2014
Rhodanosaurus: F. Nopcsa, 1929 [JSS → Struthiosaurus]
Rhoetosaurus: Longman, 1926
Rhomaleopakhus: P. Upchurch, P.D. Mannion, Xing Xu & P.M. Barrett, 2021
Riabininohadros: R.E. Ulansky, 2015 vide A.V. Lopatin & A.O. Averianov, 2020
Ricardoestesia: P.J. Currie, K.J. Rigby & R.E. Sloan, 1990
Rileya: F. von Huene, 1902 / W.H. Ashmead, 1888 → Rileyasuchus [nomen dubium]
Rileyasuchus: Kuhn, 1961 [nomen dubium]
Rinchenia: R. Barsbold, 1997 vide H. Osmólska, P.J. Currie & R. Barsbold, 2004
Rinconsaurus: J.O. Calvo & B.J. González-Riga (as González Riga), 2003
Rioarribasaurus: A.P. Hunt & S.G. Lucas, 1991 [nomen rejectum → Coelophysis]
Riojasaurus: J.F. Bonaparte, 1969
Riojavenatrix: E. Isasmendi, E. Cuesta, I. Díaz-Martínez, J. Company, P. Sáez-Benito, L.I. Viera, A. Torices & X. Pereda-Suberbiola, 2024
Riparovenator: C.T. Barker, D.W.E. Hone, D. Naish, A. Cau, J.A.F. Lockwood, B. Foster, C.E. Clarkin, P. Schneider & N.J. Gostling, 2021
Rocasaurus: L. Salgado & C. Azpilicueta, 2000
Roccosaurus: van Heerden vide Anderson & Cruickshank, 1978 [nomen nudum → Melanorosaurus]
Rubeosaurus: A.T. McDonald & J.R. Horner, 2010 [PSS → Styracosaurus]
Ruehleia: P.M. Galton, 2001
Rugocaudia: D.C. Woodruff, 2012
Rugops: P.C. Sereno, J.A. Wilson & Conrad, 2004
Ruixinia: Mo J, Ma F, Yu Y & Xu X, 2022
Rukwatitan: E. Gorscak, P.M. O'Connor, N.J. Stevens & E.M. Roberts, 2014
Rutellum: E. Lhuyd, 1699 [nomen oblitum; pre-Linnaean name: cf. J.B. Delair & W.A.S. Sarjeant, 2002]
Ruyangosaurus: Lü J-C, Xu L, Jia S, Zhang X-L, Zhang J-M, Yang L, You H-L & Ji Q, 2009

Sacisaurus: Ferigolo & M.C. Langer, 2006
Sahaliyania: P. Godefroit, Hai, Yu T. & Lauters, 2008
Saichania: T. Maryanska, 1977
Saldamosaurus: R.E. Ulansky, 2014
"Salimosaurus": G. Maier, 2003 [nomen nudum → Giraffatitan]
Saltasaurus: J.F. Bonaparte & J.E. Powell, 1980
Saltillomimus: M.C. Aguillón Martínez, 2014 [nomen ex dissertatione, 2010]
Saltopus: F. von Huene, 1910
"Saltriosaurus": C. Dal Sasso, 2000 [nomen nudum → Saltriovenator]
Saltriovenator: C. Dal Sasso, S. Maganuco & A. Cau, 2018
"Sanchusaurus": Hisa, 1985 [nomen nudum → Gallimimus]
Sangonghesaurus: Zhao X, 1983 [nomen nudum → Tianchisaurus]
Sanjuansaurus: O.A. Alcober & R.N. Martínez, 2010
Sanpasaurus: Yang Z.J. (as Young C.C.), 1944 [nomen dubium]
Santanaraptor: A.W.A. Kellner, 1999
Sanxiasaurus: Li N, Dai H, Tan C, Hu X-F, Wei Z-Y, Lin Y, Wei G-B, Li D-L, Meng L, Hao B-Q, You H-L & Peng G-Z, 2019
Sarahsaurus: T.B. Rowe, H-D Sues & R.R. Reisz, 2010
Saraikimasoom: M.S. Malkani, 2014
Sarcolestes: R. Lydekker, 1893
Sarcosaurus: Andrews, 1921
Sarmientosaurus: R.D.F. Martínez, M.C. Lamanna, F.E. Novas, R.C. Ridgely, G.A. Casal, J.E. Martínez, J.R. Vita & L.M. Witmer, 2016
Sasayamagnomus: T. Tanaka, K. Chiba, T. Ikeda & M.J. Ryan, 2024
Saturnalia: M.C. Langer, F. Abdala, M. Richter & M.J. Benton, 1999
Sauraechmodon: H. Falconer, 1861 [nomen nudum → Echinodon]
Saurolophus: B. Brown, 1912

Saurolophus morrisi renamed Augustynolophus morrisi, 2014.

Sauroniops: A. Cau, F.M. Dalla Vecchia & M. Fabbri, 2012
Sauropelta: J.H. Ostrom, 1970
Saurophaganax: D. Chure, 1995
Saurophagus: J.W. Stovall vide Ray, 1941 / W.J. Swainson 1831
Sauroplites: B. Bohlin, 1953 [nomen dubium]
Sauroposeidon: M.J. Wedel, R.L. Cifelli & R.K. Sanders, 2000
Saurornithoides: H.F. Osborn, 1924
Saurornitholestes: H-D Sues, 1978
Savannasaurus: S.F. Poropat, P.D. Mannion, P. Upchurch, S.A. Hocknull, B.P. Kear, M. Kundrát, T.R. Tischler, T. Sloan, G.H.K. Sinapius, J.A. Elliott & D.A. Elliott, 2016
Scansoriopteryx: Czerkas & Yuan, 2002
Scelidosaurus: R. Owen, 1859
Schleitheimia: O.W.M. Rauhut, F.M. Holwerda & H. Furrer, 2020
Scipionyx: C. Dal Sasso & Signore, 1998
Sciurumimus: O.W.M. Rauhut, C. Foth, H. Tischlinger & M.A. Norell, 2012
Scolosaurus: F. Nopcsa, 1928
Scrotum: R. Brookes, 1763 [nomen oblitum; PSS → Megalosaurus]
Scutellosaurus (not to be confused with Scutosaurus): Colbert, 1981
Secernosaurus: M.K. Brett-Surman, 1979
Sefapanosaurus: A. Otero, E. Krupandan, D. Pol, A. Chinsamy & J.N. Choiniere, 2015
Segisaurus: Camp, 1936
Segnosaurus: A. Perle, 1979
Seismosaurus: Gillette, 1991
Seitaad: J.J.W. Sertich & M.A. Loewen, 2010
Sektensaurus: L.M. Ibiricu, G.A. Casal, R.D. Martínez, M. Luna, J.I. Canale, B.N. Álvarez & B. González-Riga, 2019
"Selimanosaurus": G. Maier, 2003 [nomen nudum → Dicraeosaurus]
Sellacoxa: K. Carpenter & Y. Ishida, 2010
Sellosaurus: F. von Huene, 1908
Serendipaceratops: T. Rich & P. Vickers-Rich, 2003
Serikornis: U. Lefèvre, A. Cau, A. Cincotta, Hu D-Y, A. Chinsamy, F. Escuillié & P. Godefroit, 2017 [possible bird]
Shamosaurus: T.A. Tumanova, 1983
Shanag: A.H. Turner, Hwang & M.A. Norell, 2007
Shanshanosaurus: Dong Z-M, 1977 [JSS → Tarbosaurus]
Shantungosaurus: Hu C, 1973
Shanxia: P.M. Barrett, You H-L, P. Upchurch & A.C. Burton, 1998 [PSS → Saichania]
Shanyangosaurus: Xue, Zhang Y-H, Bi, Yue & Chen D, 1996
Shaochilong: S.L. Brusatte, R.B.J. Benson, D. Chure, Xu X, C. Sullivan, & D.W.E. Hone, 2009
Shenzhouraptor: Ji Q, Ji S, You H-L, Zhang J.P, Yuan, Ji X, Li J-L. & Li Y-X, 2002 [possible bird]
Shenzhousaurus: Ji Q, M.A. Norell, P.J. Makovicky, Gao K-Q, Ji S. & Yuan, 2003
Shidaisaurus: Wu X, P.J. Currie, Dong Z-M, Pan S. & Wang T, 2009
Shingopana: E. Gorscak, P.M. O'Connor, E.M. Roberts & N.J. Stevens, 2017
Shishugounykus: Qin Z-C, J.M. Clark, J.N. Choiniere & Xu X, 2019
Shixinggia: Lü J-C & Zhang B, 2005
Shri: A.H. Turner, S. Montanari & M.A. Norell, 2021
Shuangbaisaurus: Wang G-F, You H-L, Pan S-G & Wang T, 2017
Shuangmiaosaurus: You H-L, Ji Q, Li J-L. & Li Y-X, 2003
Shunosaurus: Dong Z-M, Zhou S. & Zhang Y-H, 1983
Shuvuuia: L.M. Chiappe, M.A. Norell & J.M. Clark, 1998
Siamodon: E. Buffetaut & V. Suteethorn, 2011
Siamodracon: R.E. Ulansky, 2014
Siamosaurus: E. Buffetaut & Ingavat, 1986 [PSS → Spinosaurus]
Siamotyrannus: E. Buffetaut, V. Suteethorn & Tong H, 1996
Siamraptor: D. Chokchaloemwong, S. Hattori, E. Cuesta, P. Jintasakul, M. Shibata & Y. Azuma, 2019
Siats: L.E. Zanno & P.J. Makovicky, 2013
Sibirotitan: A.O. Averianov, S. Ivantsov, P. Skutschas, A. Faingertz & S. Leshchinskiy, 2017
Sidersaura: L.N. Lerzo, P.A. Gallina, J.I. Canale, A. Otero, J.L. Carballido, S. Apesteguía & P.J. Makovicky, 2024
Sierraceratops: S.G. Dalma, S.G. Lucas, S.E. Jasinski & N.R. Longrich, 2021 (announced), 2022 (final publication)
Sigilmassasaurus: D.A. Russell, 1996 [PSS → Spinosaurus]
Silesaurus: Dzik, 2003
Siluosaurus: Dong Z-M, 1997 [nomen dubium]
Silutitan: Wang X-L, K.L.N. Bandeira, Qiu R, Jiang S-X, Cheng X, Ma Y-X & A.W.A. Kellner, 2021
Silvisaurus: Eaton, 1960
Similicaudipteryx: He T, Wang X-L & Zhou Z, 2008
Sinankylosaurus: Wang K, Zhang Y, Chen J, Chen S. & Wang P, 2020
Sinocalliopteryx: Ji S, Ji Q, Lü J-C & Yuan, 2007
Sinocephale: D.C. Evans, C.M. Brown, You H-L & N.E. Campione, 2021
Sinoceratops: Xu X, Wang K, Zhao X & Li D-J, 2010
Sinocoelurus: Yang Z.J. (as Young C.C.), 1942
"Sinopelta": R.E. Ulansky, 2014 / Xue & Zhang, 1996 → Sinopeltosaurus
Sinopeltosaurus: R.E. Ulansky, 2014
Sinornithoides: D.A. Russell & Dong Z-M, 1994 (not 1993)
Sinornithomimus: Y. Kobayashi & Lü J-C, 2003
Sinornithosaurus: Xu X, Wang X-L & Wu X, 1999
Sinosauropteryx: Ji Q. & Ji S, 1996
Sinosaurus: Yang Z.J. (as Young C.C.), 1948
Sinotyrannus: Ji Q, Ji S-A & Zhang L-J, 2009
Sinovenator: Xu X, M.A. Norell, Wang X-L, P.J. Makovicky & Wu X, 2002
Sinraptor: P.J. Currie & Zhao X, 1994 (not 1993)
Sinucerasaurus: Xu X. & Wang X-L, 2004 vide Xu X. & M.A. Norell, 2006 [JOS → Sinusonasus]
Sinusonasus: Xu X. & Wang X-L, 2004
Sirindhorna: M. Shibata, P. Jintasakul, Y. Azuma & You H-L, 2015
Skaladromeus: C.A. Boyd, 2012 [nomen ex dissertatione]
Skorpiovenator: Canale, Scanferla, F.L. Agnolín & F.E. Novas, 2009
Smitanosaurus: J.A. Whitlock & J.A. Wilson Mantilla, 2020
Sonidosaurus: Xu X, Zhang X-H, Tan Q, Zhao X. & Tan L, 2006
Sonorasaurus: Ratkevich, 1998
Soriatitan: R. Royo-Torres, C. Fuentes, M. Meijide, F. Meijide-Fuentes & M. Meijide-Fuentes, 2017
Soumyasaurus: V. Sangül, F.L. Agnolín & S. Chatterjee, 2018
Spectrovenator: H. Zaher, D. Pol, B.A. Navarro, R. Delcourt & A.B. Carvalho, 2020
Sphaerotholus: T.E. Williamson & T.D. Carr, 2003 [PSS → Prenocephale]
Sphenospondylus: H.G. Seeley, 1882 [JSS → Iguanodon]
Spiclypeus: J.C. Mallon, C.J. Ott, P.L. Larson, E.M. Iuliano & D.C. Evans, 2016
Spicomellus: S.C.R. Maidment, S.J. Strachan, D. Ouarhache, T.M. Scheyer, E.E. Brown, V. Fernandez, Z. Johanson, T.J. Raven & P.M. Barrett, 2021
Spinophorosaurus: K. Remes, F. Ortega, I. Fierro, U. Joger, R. Kosma, J.M.M. Ferrer, L.M. Chiappe, P. Dantas, F. Escaso, Gasulla, López, Pomares, B. Ribeiro, J.L. Sanz, Tent-Manclús, Faust, H. Joger, J. Joger, Krüger, Mudroch, Rabe, Ritter, Sommer, O.A. Ide & A. Maga, 2009
Spinops: A.A. Farke, M.J. Ryan, P.M. Barrett, D.H. Tanke, D.R. Braman, M.A. Loewen & M.R. Graham, 2011
Spinosaurus: E. Stromer, 1915
Spinostropheus: P.C. Sereno, J.A. Wilson & Conrad, 2004
Staurikosaurus: Colbert, 1970
Stegoceras: Lambe, 1902

Stegoceras brevis renamed Foraminacephale brevis, 2016.

Stegopelta: Williston, 1905 [PSS → Nodosaurus]
Stegosaurides: B. Bohlin, 1953 [nomen dubium]
Stegosaurus: O.C. Marsh, 1877

Stegosaurus marshi renamed Hoplitosaurus marshi, 1902.
Stegosaurus longispinus renamed Alcovasaurus longispinus, 2016.

Stegouros: S. Soto-Acuña, A.O. Vargas, J. Kaluza, M.A. Leppe, J.F. Botelho, J. Palma-Liberona, C. Simon-Gutstein, R.A. Fernández, H. Ortiz, V. Milla, B. Aravena, L.M.E. Manríquez, J. Alarcón-Muñoz, J.P. Pino, C. Trevisan, H. Mansilla, L.F. Hinojosa, V. Muñoz-Walther & D. Rubilar-Rogers, 2021
Stellasaurus: J.P. Wilson, M.J. Ryan & D.C. Evans, 2020
Stenonychosaurus: C.M. Sternberg, 1932 [PSS → Polyodontosaurus, Troödon]
Stenopelix: H. von Meyer, 1857
Stenotholus: Giffin, Gabriel & Johnson, 1988 [JSS → Stygimoloch]
Stephanosaurus: Lambe, 1914 [nomen dubium; PSS → Lambeosaurus]
Stereocephalus: Lambe, 1902 / Lynch-Arribalzaga, 1884 → Euoplocephalus
Sterrholophus: O.C. Marsh, 1891 [JSS → Triceratops]
Stokesosaurus: J.H. Madsen, 1974

Stokesosaurus langhami renamed Juratyrant langhami, 2013.

Stormbergia: R.J. Butler, 2005
Strenusaurus: J.F. Bonaparte, 1969 [JSS → Riojasaurus]
Streptospondylus: H. von Meyer, 1830 [nomen dubium]
Struthiomimus: H.F. Osborn, 1916
Struthiosaurus: E. Bunzel, 1870
Stygimoloch: P.M. Galton & H-D Sues, 1983 [PSS → teen Pachycephalosaurus]
Stygivenator: G. Olshevsky vide G. Olshevsky, Ford & Yamamoto, 1995 [JSS → Tyrannosaurus]
Styracosaurus: Lambe, 1913

Styracosaurus ovatus renamed Rubeosaurus ovatus, 2010.

Suchomimus: P.C. Sereno, Beck, D.B. Dutheil, Gado, H.C.E. Larsson, Lyon, Marcot, O.W.M. Rauhut, R.W. Sadleir, C.A. Sidor, D.J. Varricchio, G.P. Wilson & J.A. Wilson, 1998
Suchosaurus: R. Owen, 1841 [nomen dubium; PSS → Baryonyx]
"Suciasaurus": B.R. Peecook & C.A. Sidor, 2015 [PSS → Daspletosaurus; various Burke Museum products]
"Sugiyamasaurus": Lambert, 1990 [nomen nudum]
Sulaimanisaurus: M.S. Malkani, 2006
Supersaurus: J.A. Jensen, 1985
Suskityrannus: S.J. Nesbitt, R.K. Denton Jr, M.A. Loewen, S.L. Brusatte, N.D. Smith, A.H. Turner, J.I. Kirkland, A.T. McDonald & D.G. Wolfe, 2019
Suuwassea: J.D. Harris & P. Dodson, 2004
Suzhousaurus: Li D-Q, Peng C, You H-L, M.C. Lamanna, J.D. Harris, K.J. Lacovara & Zhang J-P, 2007
Symphyrophus: E.D. Cope, 1878 [JSS → Camptosaurus]
Syngonosaurus: H.G. Seeley, 1879 [nomen dubium]
Syntarsus (genus also refers to a beetle): Raath, 1969 / L. Fairmaire, 1869 → Megapnosaurus
Syrmosaurus: Maleev, 1952 [JSS → Pinacosaurus]
Szechuanoraptor: D. Chure, 2001 [nomen ex dissertatione]
Szechuanosaurus: Yang Z.J. (as Young C.C.), 1942 [nomen dubium]

Tachiraptor: M.C. Langer, A.D. Rincón, J. Ramezani, A. Solórzano & O.W.M. Rauhut, 2014
Talarurus: Maleev, 1952
Talenkauen: F.E. Novas, A.V. Cambiaso & A. Ambrosio, 2004
Taleta: N.R. Longrich, X. Pereda-Suberbiola, N. Bardet & N-E Jalil, 2025
Talos: L.E. Zanno, D.J. Varricchio, P.M. O'Connor, A.L. Titus & M.J. Knell, 2011
Tamarro: A.G. Sellés, B. Vila, S.L. Brusatte, P.J. Currie & À. Galobart, 2021
Tambatitanis: H. Saegusa & T. Ikeda, 2014
Tameryraptor: M. Kellermann, E. Cuesta & O.W.M. Rauhut, 2025
Tangvayosaurus: R. Allain, P. Taquet, Battail, Dejax, P. Richir, Veran, Limon-Duparcmeur, Vacant, O. Mateus, Sayarath, Khenthavong & Phouyavong, 1999
Tanius: Wiman, 1929
Tanycolagreus: K. Carpenter, C.A. Miles & K. Cloward, 2005
Tanystrosuchus: Kuhn, 1963 [nomen dubium; PSS → Halticosaurus or Liliensternus]
Taohelong: Yang J-T, You H-L, Li D-Q & Kong D-L, 2013
Tapuiasaurus: H. Zaher, D. Pol, A.B. Carvalho, P.M. Nascimento, C. Riccomini, P.L. Larson, R.D. Juárez-Valieri, R. Pires-Domingues, N.J. da Silva Jr & D.A. Campos, 2011
Tarascosaurus: J. LeLoeuff & E. Buffetaut, 1991
Tarbosaurus: Maleev, 1955
Tarchia: T. Maryanska, 1977
Tastavinsaurus: J.I. Canudo, R. Royo-Torres & Cuenca-Bescós, 2008
Tatankacephalus: W.L. Parsons & K.M. Parsons, 2009
Tatankaceratops: C.J. Ott & P.L. Larson, 2010
Tataouinea: F. Fanti, A. Cau, M. Hassine & M. Contessi, 2013
Tatisaurus: Simmons, 1965
Taurovenator: M.J. Motta, A.M. Aranciaga Rolando, S. Rozadilla, F.L. Agnolín, N.R. Chimento, F. Brissón-Eglí & F.E. Novas, 2016
Taveirosaurus: Telles Antunes & Sigogneau-Russell, 1991
Tawa (genus also refers to a Hopi mythological solar diety): S.J. Nesbitt, N.D. Smith, R.B. Irmis, A.H. Turner, A. Downs & M.A. Norell, 2009
Tawasaurus: Yang Z.J. (as Young C.C.), 1982
Tazoudasaurus: R. Allain, Aquesbi, Dejax, C. Meyer, Monbaron, Montenat, P. Richir, Rochdy, D.A. Russell & P. Taquet, 2004
Technosaurus: S. Chatterjee, 1984
Tehuelchesaurus: T. Rich, P. Vickers-Rich, Gimenez, Cúneo, Puerta & Vacca, 1999
Teihivenator: Yun C-G, 2017 [nomen dubium; composite genotype]
Teinurosaurus: F. Nopcsa, 1928 vide F. Nopcsa, 1929 [nomen dubium]
Teleocrater: S.J. Nesbitt, R.J. Butler, M.D. Ezcurra, P.M. Barrett, M.R. Stocker, K.D. Angielczyk, R.M.H. Smith, C.A. Sidor, G. Niedzwiedzki, A.G. Sennikov & A.J. Charig, 2017 [formerly Teleocrater: A.J. Charig, 1956 nomen nudum; non-dinosaurian archosaur]
Telmatosaurus: F. Nopcsa, 1903
Tenantosaurus: B. Brown vide D. Chure & McIntosh, 1989 [nomen nudum → Tenontosaurus]
Tendaguria: J.F. Bonaparte, Heinrich & Wild, 2000
Tengrisaurus: A.O. Averianov & P. Skutschas, 2017
Tenontosaurus: J.H. Ostrom, 1970
Teratophoneus: T.D. Carr, T.E. Williamson, B.B. Britt & K. Stadtman, 2011
Terminocavus: D.W. Fowler & E.A. Freedman Fowler, 2020
Tethyshadros: F.M. Dalla Vecchia, 2009
Tetragonosaurus: Parks, 1931 [nomen rejectum → Procheneosaurus]
Texacephale: N.R. Longrich, J. Sankey, & D. Tanke, 2010
Texasetes: Coombs, 1995
Teyuwasu: Kischlat, 1999
Thanatotheristes: J.T. Voris, F. Therrien, D.K. Zelenitsky & C.M.Brown, 2020
Thanos: R. Delcourt & F.V. Iori, 2018
Tharosaurus: S. Bajpai, D. Datta, P. Pandey, T. Ghosh, K. Kumar & D. Bhattacharya, 2023
Thecocoelurus: F. von Huene, 1923 [nomen dubium]
Thecodontosaurus: Riley & Stutchbury, 1836
Thecospondylus: H.G. Seeley, 1882 [nomen dubium]
Theiophytalia: Brill & K. Carpenter, 2006
Therizinosaurus: Maleev, 1954
Therosaurus: L.J. Fitzinger, 1840 [JOS → Iguanodon]
Thescelosaurus: C.W. Gilmore, 1913
Thespesius: J. Leidy, 1856 [nomen dubium]
Thotobolosaurus: Ellenberger, 1972 [nomen nudum → Kholumolumo]
Thyreosaurus: O. Zafaty, M. Oukassou, F. Riguetti, J. Company, S. Bendrioua, R. Tabuce, A. Charrière & X. Pereda-Suberbiola, 2024
Tiamat: P.V.L.G.C. Pereira, K.L.N. Bandeira, L.S. Vidal, T.B. Ribeiro, C.R. dos A. Candeiro & L.P. Bergqvist, 2024
Tianchisaurus: Dong Z-M, 1993 [nomen dubium]
Tianchungosaurus: Zhao X, 1983 [nomen nudum]
Tiantaisaurus: Dong Z-M, Chen K-Q. & Jiang y, 2007 [nomen manuscriptum]
Tianyulong: Zheng X-T, You H-L, Xu X. & Dong Z-M, 2009
Tianyuraptor: Zheng X-T, Xu X, You H-L, Zhao Q, & Dong Z-M, 2009
Tianzhenosaurus: Pang & Cheng Z, 1998
Tichosteus: E.D. Cope, 1877 [nomen dubium]
Tienshanosaurus: Yang Z.J. (as Young C.C.), 1937
Tietasaura: K.L.N. Bandeira, B.A. Navarro, R.V. Pêgas, N.S. Brilhante, A.S. Brum, L.G. de Souza, R.C. da Silva & V. Gallo, 2024
Timimus: T. Rich & P. Vickers-Rich, 1994
Timurlengia: S.L. Brusatte, A.O. Averianov, H-D Sues, A. Muir & I.B. Butler, 2016
Titanoceratops: N.R. Longrich, 2011 [PSS → Pentaceratops]
Titanomachya: A. Pérez-Moreno, L. Salgado, J.L. Carballido, A. Otero & D. Pol, 2024
Titanosaurus: R. Lydekker, 1877 [nomen dubium]
Titanosaurus: O.C. Marsh, 1877 / R. Lydekker, 1877 → Atlantosaurus [nomen dubium]
Tlatolophus: Á.A. Ramírez-Velasco, F.J. Aguilar, R. Hernández-Rivera, J.L. Gudiño Maussán, M.L. Rodríguez & J. Alvarado-Ortega, 2021
Tochisaurus: S.M. Kurzanov & H. Osmólska, 1991
Tomodon: J. Leidy, 1865 / A. Duméril, 1853 → Diplotomodon
Tonganosaurus: Li K, Yang C-Y, Liu J. & Wang Z-X, 2010
Tongnanlong: Wei X-F, Tan Y-J, Jiang S, Ding J, Li L, Wang X-B, Liu Y-Y, Wei G-B, Li D-L, Liu Y, Peng G-Z, Zhang S-H & Lao C-L, 2025
Tongtianlong (not to be confused with Tongtiandong): Lü J-C, Chen R, S.L. Brusatte, Zhu Y-X & Shen C, 2016
Tonouchisaurus: R. Barsbold, 1994 [nomen nudum]
Torilion: K. Carpenter & Y. Ishida, 2010 [JOS → Barilium]
Tornieria: Sternfeld, 1911
Torosaurus: O.C. Marsh, 1891 [PSS → Triceratops]
Torvosaurus: P.M. Galton & J.A. Jensen, 1979
Tototlmimus: C.I. Serrano-Brañas, E. Torres-Rodríguez, P.C. Reyes-Luna, I. González-Ramírez, C. González-León, 2015
Trachodon: J. Leidy, 1856 [nomen dubium] (The original material has turned out to be from two different types of dinosaurs. This makes the name useless for scientific purposes.)

Trachodon altidens renamed Didanodon altidens, 1902.
Trachodon amurensis renamed Mandschurosaurus amurensis, 1930.

Tralkasaurus: M.A. Cerroni, M.J. Motta, F.L. Agnolín, A.M. Aranciaga Rolando, F. Brissón-Eglí & F.E. Novas, 2019
Transylvanosaurus: F.J. Augustin, D. Bastiaans, M.D. Dumbravă & Z. Csiki-Sava, 2022
Tratayenia: J.D. Porfiri, R.D. Juárez-Valieri, D.D.D. Santos & M.C. Lamanna, 2018
Traukutitan: R.D. Juárez-Valieri & J.O. Calvo, 2011
Triceratops: O.C. Marsh, 1889
Trierarchuncus: D.W. Fowler, J.P. Wilson, E.A. Freedman Fowler, C.R. Noto, D. Anduza & J.R. Horner, 2020
Trigonosaurus: D.A. Campos, A.W.A. Kellner, Bertini & R.A. Santucci, 2005
Trimucrodon: Thulborn, 1973
Trinisaura: R.A. Coria, J.J. Moly, M. Reguero, S. Santillana & S. Marenssi, 2013
Triunfosaurus: I. de Souza Carvalho, L. Salgado, R.M. Lindoso, H.I. de Araújo-Júnior, F.C. Costa Nogueira, J.A. Soares, 2017
Troödon: J. Leidy, 1856 [nomen dubium; PSS → Latenivenatrix, Polyodontosaurus, Stenonychosaurus]

Troödon bexelli renamed Sinocephale bexelli, 2021.

Tsaagan: M.A. Norell, J.M. Clark, A.H. Turner, P.J. Makovicky, R. Barsbold & T. Rowe, 2006
Tsagantegia: T.A. Tumanova, 1993
Tsintaosaurus: Yang Z.J. (as Young C.C.), 1958
Tuebingosaurus: O.R. Regalado Fernández & I. Werneburg, 2022
Tugulusaurus: Dong Z-M, 1973
Tuojiangosaurus: Dong Z-M, Li X-M, Zhou S. & Zhang Y-H, 1977
Turanoceratops: Nessov & Kaznyshkina vide Nessov, Kaznyshkina & Cherepanov, 1989
Turiasaurus: R. Royo-Torres, A. Cobos & L. Alcalá, 2006
Tylocephale: T. Maryanska & H. Osmólska, 1974
Tylosteus: J. Leidy, 1872 [nomen oblitum; SSS → Pachycephalosaurus]
Tyrannomimus: S. Hattori, M. Shibata, S. Kawabe, T. Imai, H. Nishi & Y. Azuma, 2023
Tyrannosaurus: H.F. Osborn, 1905
Tyrannotitan: F.E. Novas, S. de Valai, P. Vickers-Rich & T. Rich, 2005
Tyreophorus: F. von Huene, 1929 [nomen nudum]

Uberabatitan: L. Salgado & I. de Souza Carvalho, 2008
Ubirajara: R.S.H. Smyth, D.M. Martill, E. Frey, H.E. Rivera-Sylva & N. Lenz, 2020
Udanoceratops: S.M. Kurzanov, 1992
Udelartitan: M. Soto, J.I. Carballido, M.C. Langer, J.C.G. Silva Jr, F. Montenegro & D. Perea, 2024
Ugrosaurus: Cobabe & Fastovsky, 1987 [JSS → Triceratops]
Ugrunaaluk: H. Mori, P.S. Druckenmiller & G.M. Erickson, 2015 [PSS → Edmontosaurus]
Uintasaurus: Holland, 1919 [JSS → Camarasaurus]
Ultrasauros: J.A. Jensen vide G. Olshevsky, 1991 [JSS → Supersaurus]
Ultrasaurus: H.M. Kim, 1983 [nomen dubium]
Ultrasaurus: J.A. Jensen, 1985 / H.M. Kim, 1983 → Ultrasauros
Ulughbegsaurus: K. Tanaka, O.U.O. Anvarov, D.K. Zelenitsky, A.S. Ahmedshaev & Y. Kobayashi, 2021
Umarsaurus: T. Maryanska & H. Osmólska, 1981 vide G. Olshevsky, 1992 [nomen nudum → Barsboldia]
Unaysaurus: L.A. Leal, S.A.K. Azevedo, A.W.A. Kellner & A.A.S. Da Rosa, 2004
Unenlagia: Nova & Puerta, 1997
Unescoceratops: M.J. Ryan, D.C. Evans, P.J. Currie, C.M. Brown & D. Brinkman, 2011 [2012]
Unquillosaurus: J.E. Powell, 1979
Urbacodon: A.O. Averianov & H-D Sues, 2007
Uriash: V. Díez Díaz, P.D. Mannion, Z. Csiki-Sava & P. Upchurch, 2025
Utahceratops: S.D. Sampson, M.A. Loewen, A.A. Farke, E.M. Roberts, C.A. Forster, J.A. Smith & A.L. Titus, 2010
Utahraptor: J.I. Kirkland, Burge & Gaston, 1993
Uteodon: A.T. McDonald, 2011 [PSS → Camptosaurus]
Utetitan: G.S. Paul, 2025

Vagaceratops: S.D. Sampson, M.A. Loewen, A.A. Farke, E.M. Roberts, C.A. Forster, J.A. Smith & A.L. Titus, 2010
Vahiny: K.C. Rogers & J.A. Wilson, 2014
Valdoraptor: G. Olshevsky, 1991
Valdosaurus: P.M. Galton, 1977
Vallibonavenatrix: E. Malafaia, J.M. Gasulla, F. Escaso, I. Narváez, J.L. Sanz & F. Ortega, 2019
Variraptor: J. LeLoeuff & E. Buffetaut, 1998
Vayuraptor: A. Samathi, P. Chanthasit & P.M. Sander, 2019
Vectaerovenator: C.T. Barker, D. Naish, C.E. Clarkin, P. Farrell, G. Hullmann, J. Lockyer, P. Schneider, R.K.C. Ward & N.J. Gostling, 2020
Vectensia: J.B. Delair, 1982 [nomen nudum → Hylaeosaurus]
Vectidromeus: N.R. Longrich, D.M. Martill, M. Munt, M. Green, M. Penn & S. Smith, 2023 (announced), 2024 (published)
Vectipelta: S.Pond, S.J. Strachan, T.J. Raven, M.I. Simpson, K. Morgan & S.C.R. Maidment, 2023
Vectiraptor: N.R. Longrich, D.M. Martill & M.L. Jacobs, 2021
Vectisaurus: J.W. Hulke, 1879 [JSS → Iguanodon]
Velafrons: T.A. Gates, S.D. Sampson, Delgado deJesús, L.E. Zanno, D.A. Eberth, R. Hernández-Rivera, M.C. Aguillón-Martínez & J.I. Kirkland, 2007
Velocipes: F. von Huene, 1932 [nomen dubium]
Velociraptor: H.F. Osborn, 1924
Velocisaurus: J.F. Bonaparte, 1991
Venenosaurus: Tidwell, K. Carpenter & S. Meyer, 2001
Vespersaurus: M.C. Langer, N. de Oliveira Martins, P.C. Manzig, G. de Souza Ferreira, J.C. de Almeida Marsola, E. Fortes, R. Lima, L.C.F. Sant´ana, L. da Silva Vidal, R.H. da Silva Lorençato & M.D. Ezcurra, 2019
Veterupristisaurus: O.W.M. Rauhut, 2011
Viavenator: L.S. Filippi, A.H. Méndez, R.D. Juárez Valieri & A.C. Garrido, 2016
Vitakridrinda: M.S. Malkani, 2006
Vitakrisaurus: M.S. Malkani, 2010
Vitosaura: H.J. Velandia, M.D. Ezcurra, E.M. Hechenleitner, G. Basilici, A.G. Martinelli & L.E. Fiorelli, 2025
Volgatitan: A.O. Averianov & V. Efimov, 2018
Volkheimeria: J.F. Bonaparte, 1979
Vouivria: P.D. Mannion, R. Allain & O. Moine, 2017
Vulcanodon: Raath, 1972

Wadhurstia: K. Carpenter & Y. Ishida, 2010 [JOS → Hypselospinus]
Wakinosaurus: Okazaki, 1992
Walgettosuchus: F. von Huene, 1932
Walkeria (genus also refers to a bryozoa): S. Chatterjee, 1987 / J. Fleming, 1823 → Alwalkeria
Walkersaurus: Welles, H.P. Powell & Pickering vide Pickering, 1995 [nomen nudum → Duriavenator]
Wamweracaudia: P.D. Mannion, P. Upchurch, D. Schwarz & O. Wings, 2019
"Wangonisaurus": G. Maier, 2003 [nomen nudum → Giraffatitan]
Wannanosaurus: Hou, 1977
Weewarrasaurus: P.R. Bell, M.C. Herne, T, Brougham & E.T. Smith, 2018
Wendiceratops: D.C. Evans & M.J. Ryan, 2015
Wiehenvenator: O.W.M. Rauhut, Tom R. Hübner & K-P Lanser, 2016
Willinakaqe: R.D. Juárez-Valieri, J.A. Haro, L.E. Fiorelli & J.O. Calvo, 2011
Wintonotitan: S.A. Hocknull, M.A. White, T.R. Tischler, A.G. Cook, N.D. Calleja, T. Sloan, D.A. Elliott, 2009
Wudingloong: Wang Y-M, Zhang Q-N, Wang Y-C, Xu H, Chen J, Feng Z, Xu X, Wang T & You H-L, 2025
Wuerhosaurus: Dong Z-M, 1973 [PSS → Stegosaurus]
Wulagasaurus: P. Godefroit, Hai, Yu T. & Lauters, 2008
Wulatelong: Xu X, Tan Q-W, Wang S, C. Sullivan, D.W.E. Hone, Han F-L, Ma Q-Y, Tan L. & Xiao D, 2013
Wulong: A.W. Poust, Gao C-L, D.J. Varriccho, Wu J-L & Zhang F-J, 2020
Wyomingraptor: [Anonymous], 1997 [nomen nudum → Allosaurus]

Xenoceratops: M.J. Ryan, D.C. Evans & K.M. Shepherd, 2012
Xenoposeidon: M.P. Taylor & D. Naish, 2007
Xenotarsosaurus: R.D. Martínez, Gimenez, Rodriguez & Bochatey, 1986
Xianshanosaurus: Lü J-C, Xu L, Jiang X, Jia S, Li M, Yuan, Zhang X-L & Ji Q, 2009
Xiaosaurus: Dong Z-M & Tang Z, 1983
Xiaotingia: Xu X, You H-L, Du K. & Han F, 2011 [possible bird]
Xinghesaurus: Y. Hasegawa, K. Carpenter, M.C. Lamanna & Xu X, 2009 [nomen nudum; in Japanese guidebook "Dinosaur Expo 2009: The Miracle of Deserts"]
Xingtianosaurus: Qiu R, Wang X-L, Wang Q, Li N, Zhang J-L & Ma Y, 2019
Xingxiulong: Wang Y-M, You H-L & Wang T, 2017
Xinjiangovenator: O.W.M. Rauhut & Xu X, 2005
Xinjiangtitan: Wu W-H, Zhou C-F, O. Wings, T. Sekiya & Dong Z-M, 2013
Xiongguanlong: Li D-Q, M.A. Norell, Gao K-Q, N.D. Smith & P.J. Makovicky, 2009
Xixianykus: Xu X, Wang D-Y, C. Sullivan, D.W.E. Hone, Han F-L, Yan R-H, & Du F-M, 2010
Xixiasaurus: Lü J-C, Xu L, Liu Y-Q, Zhang X-L, Jia S. & Ji Q, 2010
Xixiposaurus: Sekiya T, 2010
Xiyunykus: Xu X, J.N. Choiniere, Tan Q, R.B.J. Benson, J.M. Clark, C. Sullivan, Zhao Q, Han F, Ma Q, He Y, Wang S, Xing H. & Tan L, 2018
Xuanhanosaurus: Dong Z-M, 1984
Xuanhuaceratops: Zhao X, Cheng Z, Xu X. & P.J. Makovicky, 2006
Xuanhuasaurus: Zhao X. (as Chao S.), 1985 [nomen nudum → Xuanhuaceratops]
Xunmenglong: Xing L, T. Miyashita, Wang D-H, Niu K-C. & P.J. Currie, 2019
Xuwulong: You H-L, Li D-Q & Liu W, 2011

Yaleosaurus: F. von Huene, 1932 [JSS → Anchisaurus]
Yamaceratops: P.J. Makovicky & M.A. Norell, 2006
Yamanasaurus: S. Apesteguía, J.E. Soto Luzuriaga, P.A. Gallina, J.T. Granda & G.A. Guamán Jaramillo, 2019
Yamatosaurus: Y. Kobayashi, R. Takasaki, K. Kubota & A.R. Fiorillo, 2021
Yanbeilong: Jia L, Li N, Dong L-Y, Shi J-R, Kang Z-S, Wang S-Z, Xu S-C & You H-L, 2024
Yandusaurus: He X, 1979
Yangchuanosaurus: Dong Z-M, Chang Y-H. (as Chang Y.), Li X-M. & Zhou S, 1978
Yaverlandia: P.M. Galton, 1971
Yehuecauhceratops: H.E. Rivera-Sylva, E. Frey, W. Stinnesbeck, J.R. Guzmán-Gutiérrez & A.H. González-González, 2017
Yi (Yi qi): Xu X,Zheng X-T, C. Sullivan, Wang X-L, Xing L, Wang Y, Zhang X-M, J.K. O'Connor, Zhang F-C & Pan Y-H, 2015
Yibinosaurus: Ouyang H, 2001
Yimenosaurus: Bai vide Bai, Yang J. & Wang G-H, 1990
Yingshanosaurus: Zhou S, 1994
Yinlong: Xu X, C.A. Forster, J.M. Clark & Mo, 2006
Yixianosaurus: Xu X. & Wang X-L, 2003 [possible bird]
Yizhousaurus: Zhang Q-N, You H-L, Wang T. & S. Chatterjee, 2018
Yongjinglong: Li L-G, Li D-Q, You H-L & P. Dodson, 2014
Ypupiara: A.S. Brum, R.V. Pêgas, K.L.N. Bandeira, L.G. Souza, D.A. Campos & A.W.A. Kellner, 2021
Yuanmouraptor: Zou Y, Chen L, Wang T, Wang G-F, Zhang W-G, Zhang X-Q, Wang Z-J, Wu X-C & You H-L, 2025
Yuanmousaurus: Lü J-C, Li S, Ji Q, Wang G-F, Zhang J-H & Dong Z-M, 2006
Yuanyanglong: Mingze Hao, Zhiyu Li, Zhili Wang, Shuqiong Wang, Feimin Ma, Qinggele, J. Logan King, Rui Pei, Qi Zhao & Xing Xu, 2024 (announced), 2025 (published)
Yubasaurus: He X, 1975 ? [nomen nudum → Yandusaurus]
Yueosaurus: Zheng W, Jin X, M. Shibata, Y. Azuma & Yu F, 2011
Yulong: Lü J-C, P.J. Currie, Xu L, Zhang X-L, Pu H & Jia S, 2013
Yunganglong: Wang R-F, You H-L, Xu S-C, Wang S-Z, Yi J, Xie L-J, Jia L & Li Y-X, 2013
Yunmenglong: Lü J-C, Xu L, Pu H, Zhang X-L, Zhang Y-Y, Jia S, Chang H, Zhang J-M & Wei X-F, 2013
Yunnanosaurus: Yang Z.J. (as Young C.C.), 1942
Yunxianosaurus: Li Z-Q, 2001 [nomen nudum]
Yunyangosaurus: Dai H, R. Benson, Hu X, Ma Q, Tan C, Li N, Xiao M, Hu H-J, Zhou Y, Wei Z-Y, Zhang F, Jiang S, Li D-L, Peng G-Z, Yu Y & Xu X, 2020
Yurgovuchia: P. Senter, J.I. Kirkland, D.D. DeBlieux, S.K. Madsen & N. Toth, 2012
Yutyrannus: Xu X, Wang K, Zhang K, Ma Q, Xing L, C. Sullivan, Hu D, Cheng S. & Wang S, 2012
Yuxisaurus: Yao X, P.M. Barrett, Yang L, Xu X. & Bi S-D, 2022
Yuzhoulong: Dai H, Tan C, Xiong C, Ma Q, Li N, Yu H, Wei Z, Wang P, Yi J, Wei G, You H & Ren X, 2022

Zalmoxes: D.B. Weishampel, Jianu, Z. Csiki & D.B. Norman, 2003
Zanabazar: M.A. Norell, P.J. Makovicky, G.S. Bever, A.M. Balanoff, J.M. Clark, R. Barsbold & T. Rowe, 2009
Zapalasaurus: L. Salgado, I. de Souza Carvalho & A.C. Garrido, 2006
Zapsalis: E.D. Cope, 1876
Zaraapelta: V.M. Arbour, P.J. Currie & D. Badamgarav, 2014
Zavacephale: T. Chinzorig, R. Takasaki, J. Yoshida, R.T. Tucker, B. Buyantegsh, B. Mainbayar, K. Tsogtbaatar & L.E. Zanno, 2025
Zby: O. Mateus, P.D. Mannion & P. Upchurch, 2014
Zephyrosaurus: H-D Sues, 1980
Zhanghenglong: Xing H, Wang D, Han F, C. Sullivan, Ma Q, He Y, D.W.E. Hone, Yan R, Du F. & Xu X, 2014
Zhejiangosaurus: Lü J-C, Jin X, Sheng, Li Y-H, Wang G-P & Y. Azuma, 2007 [nomen dubium]
Zhenyuanlong: Lü J-C, S.L. Brusatte, 2015
Zhongjianosaurus: Xu X. & Qin Z-C, 2017
Zhongornis: Gao C, L.M. Chiappe, Meng Q, J.K. O'Connor, Wang X-R, Cheng X. & Liu J-Y, 2008
Zhongyuansaurus: Xu L, Lü J-C, Zhang X-L, Jia S, Hu W, Zhang J-M, Wu Y. & Ji Q, 2007 [PSS → Gobisourus]
Zhuchengceratops: Xu X, Wang K, Zhao X, C. Sullivan & Chen S, 2010
Zhuchengosaurus: Zhao X, Li D-J, Han G, Zhao H, Liu F, Li L. & Fang X, 2007 [PSS → Shantungosaurus]
Zhuchengtitan: Mo J-Y, Wang K-B, Chen S-Q, Wang P-Y & Xu X, 2017
Zhuchengtyrannus: D.W.E. Hone, Wang K, C. Sullivan, Zhao X, Chen S, Li D, Ji S, Ji Q & Xu X, 2011
Ziapelta: V.M. Arbour, M.E. Burns, R.M. Sullivan, S.G. Lucas, A.K. Cantrell, J. Fry & T.L. Suazo, 2014
Zigongosaurus: Hou L-H, Chao & Chu S, 1976 [JSS → Mamenchisaurus]
Zizhongosaurus: Dong Z-M, Zhou S. & Zhang Y-H, 1983
Zuniceratops: Wolfe & J.I. Kirkland, 1998
Zuolong: J.N. Choiniere, J.M. Clark, C.A. Forster & Xu X, 2010
Zuoyunlong: Wang R-F, You H-L, Wang S-Z, Xu S-C, Yi J, Xie L-J, Jia L. & Xing H, 2015
Zupaysaurus: A.B. Arcucci & R.A. Coria, 2003
Zuul: V.M. Arbour & D.C. Evans, 2017

not presently considered to be dinosaurian (*)

Aachenosaurus: G. Smets, 1888 * [nomen dubium; petrified wood]
Actiosaurus: H.E. Sauvage, 1882 * [nomen dubium; probably ichthyosaur]
Aggiosaurus: Ambayrac, 1913 * [metriorhychid crocodilian]
Albisaurus: Fritsch, 1905 * [nomen dubium; possible marine reptile]
Ankistrodon: T.H. Huxley, 1865 * [proterosuchian archosaur]
Anthodon: R. Owen, 1876 * [pareiasaur]
Archaeopteryx: H. von Meyer, 1861 * [bird]
Archaeornis: Petronievics vide Petronievics & Woodward, 1917 * [bird; PSS → Archaeopteryx]
Archaeovolans: Czerkas & Xu X, 2002 * [bird, originally part of Archaeoraptor specimen; PSS → Yanornis]
Arctosaurus: Adams, 1875 * [nomen dubium; non-dinosaurian reptile
Arizonasaurus: Welles, 1947 * [ctenosauriscid rauisuchian]
Avalonia: H.G. Seeley, 1898 / C.D. Walcott, 1889 * → Avalonianus [non-dinosaurian anchosaur]
Avalonianus: Kuhn, 1961 * [nomen dubium; non-dinosaurian archosaur]
Avisaurus: M.K. Brett-Surman & G.S. Paul, 1985 * [enantiornithan bird]
Azendohsaurus: J-M Dutuit, 1972 * [non-dinosaurian archosaur]
Basutodon: F. von Huene, 1932 * [nomen dubium; non-dinosaurian archosaur]
Bathygnathus: J. Leidy, 1854 * [nomen dubium; pelycosaur]
Belodon: H. von Meyer, 1842 * [phytosaur]
Brachytaenius: H. von Meyer, 1842 * [nomen dubium; non-dinosaurian reptile]
Brasileosaurus: F. von Huene, 1931 * [non-dinosaurian archosaur]
Centemodon: Lea, 1856 * [nomen dubium; phytosaur]
Chienkosaurus: Yang Z.J. (as Young C.C.), 1942 * [nomen dubium; crocodilian]
Cladeiodon: R. Owen, 1841 * [nomen dubium; non-dinosaurian archosaur]
Clarencea: A.S. Brink, 1959 * [sphenosuchian archosaur]
Clepsysaurus: I. Lea, 1851 * [phytosaur]
Coelurosauravus: Piveteau, 1926 * [gliding prolacertiform reptile]
Colonosaurus: O.C. Marsh, 1872 * [ichthyornithid bird, probably Ichthyornis]
Crosbysaurus: Heckert, 2004 * [non-dinosaurian archosaur]
Cystosaurus: Geoffroy Saint-Hilaire, 1833 * [nomen oblitum; probable teleosaurid crocodyliform]
Dakosaurus: F.A. Quenstedt, 1856 * [crocodilian]
Dasygnathoides: Kuhn, 1961 * [pseudosuchian archosaur, PSS → Ornithosuchus]
Dasygnathus: T.H. Huxley, 1877 / MacLeay, 1819 * → Dasygnathoides [pseudosuchian archosaur]
Deuterosaurus: Eichwald, 1860 * [therapsid]
Dianchungosaurus: Yang Z.J. (as Young C.C.), 1982 * [crocodilian]
Doratodon: H.G. Seeley, 1881 * [crocodilian]
Elachistosuchus: Janensch, 1949 * [rhynchocephalian]
Elopteryx: Andrews, 1913 * [nomen dubium; probable bird, possible troödontid dinosaur]
Ephoenosaurus: [Anonymous], 1839 * [nomen nudum; PSS → Machimosaurus; crocodilian]
Epicampodon: R. Lydekker, 1885 * [PSS → Ankistrodon; proterosuchid archosaur]
Eupodosaurus: G.A. Boulenger, 1891 * [nomen dubium; probable marine reptile]
Eurolimnornis: Kessler & Jurcsak, 1986 * [probable bird]
Futabasaurus: Lambert, 1990 [nomen nudum; this name has since been used for a plesiosaur (T. Sato, Y. Hasegawa & M. Manabe, 2006)]
Galesaurus: R. Owen, 1859 * [therapsid]
Galtonia: Huber, S.G. Lucas & A.P. Hunt, 1993 * [non-dinosaurian archosaur; PSS → Revueltosaurus]
Gobipteryx: Elzanowski, 1974 * [enantiornithan bird]
Gracilisuchus: Romer, 1972 * [non-dinosaurian archosaur]
Griphornis: R. Owen vide Woodward, 1862 * [nomen rejectum → Archaeopteryx; bird]
Griphosaurus: J.A. Wagner, 1861 * [nomen rejectum → Archaeopteryx; bird]
Gwyneddosaurus: Bock, 1945 * [PSS → Tanytrachelos (prolacertiform)]
Hallopus: O.C. Marsh, 1881 * [crocodilian]
Herbstosaurus: Casamiquela, 1974 * [pterosaur]
Hypselorhachis: A.J. Charig, 1967 vide R.J. Butler, P.M. Barrett, R.L. Abel & D.J. Gower, 2009 * [ctenosauriscid archosaur]
Jurapteryx: Howgate, 1985 * [PSS → Archaeopteryx; bird]
Krzyzanowskisaurus: Heckert, 2005 * [non-dinosaurian archosaur; PSS → Revueltosaurus]
Kuszholia: Nessov, 1992 * [bird]
Laornis: O.C. Marsh, 1870 * [bird]
Libycosaurus: Bonarelli, 1947 * [anthracothere mammal]
Likhoelesaurus: Ellenberger, 1970 * [nomen nudum; non-dinosaurian archosaur]
Limnornis: Kessler & Jurcsak, 1984 / Gould, 1839 * → Eurolimnornis & Palaeocursornis [probable bird]
Lisboasaurus: Seiffert, 1973 * [crocodilian]
Longisquama: Sharov, 1970 * [gliding reptile]
Macelognathus: O.C. Marsh, 1884 * [crocodilian]
Macroscelosaurus: Muenster vide von Meyer, 1847 * [nomen nudum → likely Tanystropheus; prolacertiform reptile]
Ornithosuchus: Newton, 1894 * [pseudosuchian archosaur]
Oculudentavis: Xing L, J.K. O'Connor, L. Schmitz, L.M. Chiappe, R.C. McKellar, Yi Q. & Li G, 2020 * [lizard]
Ostromia: C. Foth & O.W.M. Rauhut, 2017 * [bird; PSS → Archaeopteryx]
Palaeoctonus: E.D. Cope, 1877 * [nomen dubium; phytosaur]
Palaeocursornis: Kessler & Jurcsak, 1986 * [probable bird]
Palaeolimnornis: Jurcsak & Kessler, 1985 * [nomen nudum → Palaeocursornis; probable bird]
Palaeosauriscus: Kuhn, 1959 * [JOS → Paleosaurus; non-dinosaurian archosaur]
Palaeosaurus: L.J. Fitzinger, 1840 / Geoffroy Saint-Hilare, 1833 * → Sphenosaurus [procolophonid]
Palaeosaurus: Riley & Stutchbury, 1836 / Geoffroy Saint-Hilaire, 1833 * → Paleosaurus [non-dinosaurian archosaur]
Paleosaurus: Riley & Stutchbury, 1840 * [nomen dubium; non-dinosaurian archosaur]
Pareiasaurus: R. Owen, 1876 * [non-dinosaurian reptile]
Patricosaurus: H.G. Seeley, 1887 * [lepidosaur / archosaur chimera]
Pekinosaurus: A.P. Hunt & S.G. Lucas, 1994 * [non-dinosaurian archosaur; PSS → Revueltosaurus]
Picrodon: H.G. Seeley, 1898 * [nomen dubium; PSS → Avalonianus; non-dinosaurian archosaur]
Pneumatoarthrus: E.D. Cope, 1870 * [nomen dubium; turtle]
Poposaurus: Mehl, 1915 * [poposaurian archosaur]
Postosuchus: S. Chatterjee, 1985 * [rauisuchian archosaur]
Procerosaurus: F. von Huene, 1902 * [prolacertiform reptile; PSS → Tanystropheus]
Protecovasaurus: Heckert, 2004 * [non-dinosaurian archosaur]
Protorosaurus: H. von Meyer, 1830 * [non-dinosaurian reptile]
Rachitrema: H.E. Sauvage, 1882 * [nomen dubium; probably ichthyosaur]
Razanandrongobe: S. Maganuco, C. Dal Sasso & G. Pasini, 2006 vide C. Dal Sasso, G. Pasini, G. Fleury & S. Maganuco, 2017 * [mesoeucrocodylian]
Revueltosaurus: A.P. Hunt, 1989 * [non-dinosaurian archosaur]
Rhopalodon: Fischer von Waldheim, 1841 * [therapsid]
Riojasuchus: J.F. Bonaparte, 1969 * [ornithosuchid archosaur]
Scaphonyx: Woodward, 1908 * [rhynchosaur]
Scleromochlus: Woodward, 1907 * [non-dinosaurian archosaur]
Shuvosaurus: S. Chatterjee, 1993 * [poposaurian archosaur]
Smilodon: F. Plieninger, 1846 / P.W. Lund, 1842 * → Zanclodon [non-dinosaurian archosaur]
Sphenosaurus: H. von Meyer, 1847 * [procolophonid]
Spinosuchus: F. von Huene, 1932 * [non-dinosaurian reptile]
Spondylosoma: F. von Huene, 1942 * [rauisuchid]
Squalodon: Grateloup, 1840 * [cetacean]
Stereosaurus: H.G. Seeley, 1869 * [nomen nudum; probably plesiosaur]
Succinodon: F. von Huene, 1941 * [mollusk borings]
Suchoprion: E.D. Cope, 1877 * [nomen dubium; phytosaur]
Tanystropheus: H. von Meyer, 1855 * [prolacertiform reptile]
Tapinocephalus: R. Owen, 1876 * [therapsid]
Tecovasaurus: A.P. Hunt & S.G. Lucas, 1994 * [non-dinosaurian archsaur]
Teratosaurus: H. von Meyer, 1861 * [teratosaurid archosaur]
Termatosaurus: H. von Meyer & F. Plieninger, 1844 * [nomen dubium; phytosaur]
Trialestes: J.F. Bonaparte, 1982 * [crocodilian]
Triassolestes: Reig, 1963 / Tillyard, 1918 * → Trialestes [crocodilian]
Tribelesodon: F. Bassani, 1886 * [JSS → Tanystropheus; prolacertiform reptile]
Unicerosaurus: Baugh vide Armstrong, 1987 * [nomen nudum; fish]
Venaticosuchus: J.F. Bonaparte, 1971 * [ornithosuchid archosaur]
Wellnhoferia: Elzanowski, 2001 * [bird]
Wyleyia: C.J.O. Harrison & C.A. Walker, 1973 * [enantiornithan bird]
Yezosaurus: Obata & Muramoto vide Muramoto, 1977 * [nomen nudum; PSS → Moanasaurus (mosasaur)]
Zanclodon: F. Plieninger, 1846 * [nomen dubium; non-dinosaurian archosaur]
Zatomus: E.D. Cope, 1871 * [nomen dubium; non-dinosaurian archosaur]

Maintained by Robert Margulski; E-Mail your comments to: RLM07@Margulski.name