Dodatak:Popisi vrsta:Diapsida
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- Acallosuchus,
- Acerodontosauridae †
- Acerosodontosauridae,
- Acerosodontosaurus,
- Aciprion,
- Acrodonta,
- Adelosaurus,
- Aegyptosuchidae †
- Aegyptosuchus †
- Aeolodon †
- Aetosauria Lydekker, 1889 †
- Aetosauridae,
- Aetosaurus
- Afairiguana,
- Agama,
- Agamidae,
- Agaminae,
- Agkistrognathus Nicholls & Brinkman, 1993 †
- Agrestipus,
- Aigialosuchus †
- Akropus,
- Alligator Cuvier, 1807
- Alligatorellus †
- Alligatoridae
- Alligatorium †
- Allodaposuchus Nopcsa, 1928 †
- Allognathosuchus †
- Ammorhynchus,
- Amphisbaena,
- Amphisbaenia,
- Amphisbaeniformes,
- Amphisbaenoidea,
- Anarosauridae,
- Anarosaurus Dames, 1890 †
- Anchaurosaurus,
- Angistorhinopsis,
- Angistorhinus,
- Anglosuchus †
- Angustinaripterus He, Yan & Su, 1983 †
- Anhanguera Campos & Kellner, 1985 †
- Anhangueridae Campos & Kellner, 1985 †
- Anhanguerinae †
- Anisodontosaurus,
- Anisolepinae,
- Ankistrodon indicus,
- Anniealexandria,
- Anolis,
- Anomalopsis,
- Anomosaurus,
- Anquingosaurus,
- Anshunsaurus Liu, 1999 †
- Antipus,
- Anurognathidae Kuhn, 1937 †
- Anurognathus Doederline, 1923 †
- Apatopodidae,
- Apatopus,
- Aphrosaurus Welles, 1943 †
- Aptychodon,
- Araeoscelida †
- Araeoscelidae †
- Araeoscelidae,
- Araeoscelidia,
- Araeoscelis,
- Araeosceloidea,
- Arambourgia †
- Arambourgiania Nesov & Borkin, 1989 †
- Araripedactylus Wellnhofer, 1977 †
- Araripesaurus Price, 1971 †
- Araripesuchus †
- Archaeonectrus Novozhilov, 1964 †
- Archaeosuchia †
- Archaerhineura,
- Archeopelta,
- Archosauria
- Archosauria,
- Archosauriformes,
- Archosauromorpha Huene, 1946
- Archosauromorpha,
- Archosaurus,
- Arctosaurus,
- Ardeosauridae,
- Ardeosaurus,
- Aristelliger,
- Aristonectes Cabrera, 1941 †
- Armadillosuchus Marinho & Carvalho, 2009 †
- Arretosauridae,
- Arretosaurus
- Arthurdactylus Frey & Martill, 1994 †
- Asiatosuchus †
- Asilisaurus,
- Askeptosauridae Kuhn-Schnyder, 1952 †
- Askeptosauroidea,
- Askeptosaurus Nopcsa, 1925 †
- Asperoris,
- Atopodentatus,
- Atoposauridae †
- Atoposaurus †
- Atreipus,
- Attenborosaurus Bakker, 1993 †
- Augustasaurus Sander, Rieppel & Bucher, 1997 †
- Augustasaurus,
- Austriadactylus Dalla Vecchia, Wild, Hopf & Reitner, 2002 †
- Austriadactylus,
- Avalonianus,
- Avemetatarsalia,
- Avicephala,
- Avipes,
- Azendohsaurus,
- Azhdarchidae Nessov, 1984 †
- Azhdarcho Nessov, 1984 †
- Baharijodon †
- Balanerodus †
- Banisterobates,
- Barberenasuchus,
- Basiliscus,
- Basitheropoda,
- Bathyspondylus Delair, 1982 †
- Bathyspondylus,
- Batrachognathus Riabinin, 1948 †
- Baurusuchidae †
- Baurusuchus †
- Bavarisauridae,
- Bavarisaurus,
- Beipiaopterus Lü, 2002 †
- Belodon plieningeri,
- Belodon validus,
- Belodon,
- Bentonyx,
- Bergisuchus †
- Bernissartia †
- Bernissartiidae †
- Besanosaurus Dal Sasso & Pinna, 1996 †
- Bharatagama,
- Bishanopliosaurus Dong, 1980 †
- Blanosaurus,
- Blanus,
- Blomosaurus,
- Bobosaurus,
- Bogolubovia (Bogolubov, 1914) †
- Boreopricea,
- Boreopterus Lü, J. & Ji, Q., 2005 †
- Bottosaurus †
- Brachauchenius Williston, 1903 †
- Brachychampsa †
- Brachygnathosuchus †
- Brachysuchus,
- Bradysuchus,
- Brancasaurus Wegner, 1914 †
- Brasileodactylus Kellner, 1984 †
- Brasileosaurus †
- Brasiliguana,
- Cacibupteryx Gasparini, Fernández & de la Fuente, 2004 †
- Cadurcogekko,
- Caiman Spix, 1825
- Callawayasaurus Carpenter, 1999 †
- Callawayia (McGowan, 1994) †
- Callisaurus,
- Camptognathosaurus,
- Campylognathoides Strand, 1928 †
- Campylognathoides,
- Campylognathoididae Kuhn, 1967 †
- Campylognathoididae,
- Capelliniosuchus †
- Cargninia,
- Carniadactylus,
- Cartorhynchus Motani, Jiang, Chen, Tintori, Rieppel, Ji & Huang, 2015 †
- Caseosaurus,
- Caviramus,
- Cearadactylus Leonardi & Borgomanero, 1983 †
- Cercidopleura,
- Ceresiosaurus Peyer, 1931 †
- Chalarodon,
- Chalishevia,
- Chamaeleo,
- Chamaeleognathus
- Chamaeleonidae,
- Chamaeleonoidea,
- Champsosaurichnus,
- Champsosauridae †
- Champsosauridae,
- Champsosaurus,
- Chanaresuchus,
- Changchengopterus Lü, 2009 †
- Chaohusaurus Young & Dong, 1972 †
- Charactosuchus †
- Chasmatosuchus,
- Chelyoposuchus,
- Chelyposuchus,
- Chimaerasaurus †
- Chimaerasuchidae †
- Chimaerasuchus †
- Chinchenia Young, 1965 †
- Chinchenia,
- Choristodera †
- Choristodera,
- Chthonophidae,
- Chthonophis
- Cimoliasauridae Delair, 1959 †
- Clamydosaurus,
- Clarazia Peyer, 1936 †
- Claraziidae Peyer, 1936 †
- Claraziidae,
- Clarencea,
- Claudiosauridae †
- Claudiosauridae,
- Claudiosaurus,
- Clepsysaurus,
- Clevosauridae,
- Cnephasaurus,
- Coartaredens,
- Coburgosuchus,
- Coelurosauravidae †
- Coleonyx,
- Collilongus,
- Colymbosaurus Seeley, 1874 †
- Comodactylus Galton, 1981 †
- Comodactylus ostromi,
- Comodactylus,
- Concavispina
- Conchiosaurus,
- Congosaurus †
- Coringasuchus Kellner et al., 2009 †
- Corosauridae,
- Corosaurus Case, 1936 †
- Corosaurus,
- Corytophanes,
- Corytophanidae,
- Corytophaninae,
- Cosesaurus,
- Creberidentat
- Crenelosaurus nigrosilvanus,
- Crenelosaurus,
- Cretagama
- Cretagamini,
- Cricosaurus †
- Criorhynchus Owen, 1874 †
- Crocodilaemus †
- Crocodilia Owen, 1842
- Crocodylidae Cuvier, 1807
- Crocodylinae
- Crocodylotarsi,
- Crocodylus Laurenti, 1768
- Crosbysaurus,
- Crotaphytidae,
- Crotaphytus,
- Crurotarsi,
- Cryptoclididae Williston, 1925 †
- Cryptoclidus Seeley, 1892 †
- Crythiosaurinae,
- Crythiosaurus,
- Cteniogenyidae,
- Cteniogenys,
- Ctenochasma Meyer, 1852 †
- Ctenochasmatidae Nopsca, 1928 †
- Ctenomastax,
- Ctenosaura,
- Ctenosauriscidae †
- Cuencasaurus,
- Cuyosuchus,
- Cyamodontida,
- Cyamodontidae †
- Cyamodontidae,
- Cyamodontoidea,
- Cyamodus Meyer, 1863 †
- Cyamodus,
- Cyclura,
- Cycnorhamphus Seeley, 1870 †
- Cymatosauridae Huene, 1948 †
- Cymatosauridae,
- Cymatosaurus Fritsch, 1894 †
- Cymatosaurus,
- Cymbospondylus Leidy, 1868 †
- Cynodontosuchus †
- Cypressaurus,
- Cyrtodactylus,
- Czatkowiella,
- Dactylosaurus Bardet, 1992 †
- Dakosaurus †
- Darwinopterus Lü et al., 2009 †
- Deinosuchus Holland, 1909 †
- Dendrorhynchoides (Ji S. & Ji Q., 1998) †
- Dermodactylus (Marsh, 1878) †
- Desertiguana
- Desmatosuchia,
- Desmatosuchidae
- Desmatosuchus Case, 1920 †
- Diandongosaurus,
- Dianosuchus †
- Diaptosauria,
- Dibothrosuchus †
- Dicranopleura,
- Dictybolos,
- Dictybolus †
- Dimorphodon Owen, 1859 †
- Dimorphodon,
- Dimorphodontidae Seeley, 1870 †
- Dimorphodontidae,
- Dinosauria Owen, 1842 - dinosaurs †
- Dinosauria,
- Dinosauriformes,
- Dinosauromorpha,
- Dinosuchus †
- Diodorus,
- Diphydontosaurus,
- Diplocynodon †
- Dipsosaurus,
- Dolabrosaurus,
- Dolerosaurus,
- Dolichochamspidae †
- Dolichodeira
- Dolichorynchops Williston, 1902 †
- Doliovertebra,
- Domeykodactylus Martill, Frey, Chong Diaz & Bell, 2000 †
- Dongusia,
- Doniceps,
- Doratodon †
- Doratorhynchus Seeley, 1875 †
- Dorosuchus,
- Dorygnathus Wagner, 1860 †
- Doswellia,
- Doswelliidae,
- Doswelliina,
- Drepanosauridae †
- Drepanosauridae,
- Drepanosauromorpha,
- Dromomeron,
- Dsungaripteridae Young, 1964 †
- Dsungaripterus Young, 1964 †
- Dyoplax,
- Dyrosauridae †
- Dyrosaurus †
- Dyticonastis,
- Ebrachosuchus,
- Edennasaurus
- Edentosuchidae †
- Edgarosaurus Druckenmiller, 2002 †
- Eichstaettisaurus,
- Elanodactylus Andres & Ji Q., 2008 †
- Elasmosauridae Cope, 1869 †
- Elasmosaurus Cope, 1868 †
- Embaphias,
- Enaliosuchus †
- Endennasauridae Renesto, 1984 †
- Endennasauridae,
- Endennasaurus Renesto, 1984 †
- Endennasaurus,
- Eoalligator †
- Eocaiman †
- Eolacerta,
- Eoplesiosaurus,
- Eopteranodon Lü, J. & Zhang, B., 2005 †
- Eorasaurus Sennikov, 1997 †
- Eosauropterygia,
- Eosipterus Ji & Ji, 1997 †
- Eosuchia †
- Eotomistoma †
- Eotomistoma,
- Eretmosaurus Seeley, 1874 †
- Eretmosaurus,
- Erichosaurus,
- Erpetosuchidae †
- Erpetosuchidae,
- Erythrochampsa †
- Erythrosuchia,
- Erythrosuchidae †
- Erythrosuchidae,
- Erythrosuchus,
- Eucoelophysis,
- Eudimorphodon Zambelli, 1973 †
- Eudimorphodon,
- Eudimorphodontidae Wellnhofer, 1978 †
- Eudimorphodontidae,
- Euparkeria Broom, 1913 †
- Euparkeria,
- Euparkeriidae †
- Euparkeriidae,
- Euposauridae,
- Euposaurus,
- Eurhinosaurus Abel, 1909 †
- Eurolimnornis corneti,
- Eurolimnornis,
- Euryapsida,
- Eurycleidus Andrews, 1922 †
- Eusauropterygia,
- Eusaurosphargis,
- Euscolosuchus,
- Eusuchia
- Euthecodon †
- Excalibosaurus McGowan, 1986 †
- Faxinalipterus,
- Feilongus Wang, Kellner, Zhou & de Almeida Campos, 2005 †
- Flaviagama,
- Flaviagaminae,
- Flaviagamini,
- Francosuchus broilii,
- Francosuchus latus,
- Francosuchus,
- Fremouwsauridae,
- Fresnosaurus Welles, 1943 †
- Fugusuchus,
- Furcifer
- Futabasaurus Sato, Hasegawa & Manabe, 2006 †
- Galesphyridae †
- Galesphyridae,
- Galesphyrus,
- Gallardosaurus Gasparini, 2009 †
- Gambelia
- Garjainia,
- Gavialidae
- Gavialis Oppel, 1811
- Gavialosuchus †
- Geckolepis,
- Gegepterus Wang, Kellner, Zhou & de Almeida Campos, 2006 †
- Geiseltaliellus,
- Gekko,
- Gekkonidae,
- Gekkonoidea,
- Gekkonomorpha,
- Gekkota
- Geosaurus †
- Gephyrosauridae,
- Gephyrosaurus,
- Gerandogekko,
- Germanodactylus Young, 1964 †
- Germanosaurus,
- Gerrhosauridae,
- Gladidenagama
- Gnathodontia,
- Gnathosaurus Meyer, 1833 †
- Gobekko
- Gobiguania,
- Gobiosuchidae †
- Gobiosuchus †
- Godavarisaurus,
- Goniopholidae †
- Goniopholididae †
- Goniopholis †
- Goniosaurus Meyer, 1860 †
- Gracilisuchidae †
- Gracilisuchidae,
- Gracilisuchus †
- Graoullyodon,
- Grippia Wiman, 1929 †
- Guchengosuchus,
- Gwyneddosaurus,
- Gymocetus,
- Hadrorhineura,
- Halazhaisuchus,
- Hallopidae †
- Hallopoda †
- Hanosaurus Young, 1972 †
- Hanosaurus,
- Haopterus Wang & Lü, 2001 †
- Haplodontosaurus,
- Harpactognathus Carpenter, Unwin, Cloward, Miles & Miles, 2003 †
- Harpagosaurus excedens,
- Harrisonsaurus,
- Hassiacosuchus †
- Hatzegopteryx Buffetaut, Grigorescu & Csiki, 2002 †
- Hauffiosaurus O'Keefe, 2001 †
- Helveticosauridae Peyer, 1955 †
- Helveticosauridae,
- Helveticosaurus
- Helveticosaurus (Rieppel, 1989) †
- Hemidactylus,
- Hemilopadidae,
- Hemilopas mentzeli,
- Hemilopas,
- Hemiphyllodactylus,
- Hemiprotosuchus †
- Henodontidae †
- Henodontidae,
- Henodus
- Henodus †
- Herbstosaurus Casamiquela, 1974 †
- Herrerasauria,
- Hescheleria Peyer, 1936 †
- Hesperosuchus †
- Heterosaurus †
- Hexatarostinus Hawkins, 1840 †
- Hexatarsostinus,
- Hispanochampsa †
- Hoburogekko,
- Hodzhakulia,
- Holbrookia,
- Holopsisuchus †
- Homoeosauri,
- Hongshanopterus Wang X. et al., 2008 †
- Hoplocercidae,
- Howesia,
- Hoyalacerta,
- Hsichosuchidae †
- Hsisosuchus †
- Huanhepterus Dong, 1982 †
- Huaxiapterus Lü & Yuan, 2005 †
- Huehuecuetzpalli,
- Hunosaurus,
- Hupehsuchia Young & Dong, 1972 †
- Hupehsuchia,
- Hupehsuchidae,
- Hupehsuchidae,
- Hupehsuchus Young, 1972 †
- Hupehsuchus,
- Hydralmosaurus Welles, 1943 †
- Hydrotherosaurus Welles, 1943 †
- Hylaeochampsa †
- Hylaeochampsidae †
- Hyperodapedontidae,
- Hyperodapedontinae,
- Hyphalosauridae,
- Hyphalosaurus,
- Hyporhina
- Hyporhinidae,
- Hypsocormus †
- Icarosaurus,
- Ichthyopterygia Owen, 1840 †
- Ichthyosauridae †
- Ichthyosauromorpha Motani et al., 2014 †
- Ichthyosaurus De la Beche & Conybeare, 1821 †
- Ignotosaurus,
- Igua,
- Iguana,
- Iguania,
- Iguanidae,
- Iguaninae,
- Ikanogavialis †
- Ikechosaurus,
- Ilchunaia †
- Irenosaurus,
- Iserosaurus,
- Isfjordosaurus Motani, 1999 †
- Isochirotherium,
- Isodontosauridae,
- Isodontosaurus,
- Istiodactylidae Howse, Milner & Martill, 2001 †
- Istiodactylus Howse, Milner & Martill, 2001 †
- Itasuchus †
- Jaxtasuchus,
- Jeholopterus Wang, Zhou, Zhang & Xu, 2002 †
- Jepsibaena,
- Jesairosaurus,
- Jucaraseps,
- Jushatyria,
- Kadaliosaurus †
- Kadaliosaurus,
- Kadimakara Bartholomai, 1979 †
- Kaiwhekea Cruickshank & Fordyce, 2002 †
- Kalisuchus,
- Kaprosuchus Sereno & Larsson, 2009 †
- Karamuru Kischlat, 2000 †
- Keichousaurus Young, 1958 †
- Keichousaurus,
- Kentisuchus †
- Kepodactylus Harris & Carpenter, 1996 †
- Khurendukhosaurus,
- Kimmerosaurus Brown, 1981 †
- Koilamasuchus,
- Kronosaurus Longman, 1924 †
- Kudnu,
- Kuehneosauridae,
- Kuehneosaurus,
- Kuehneosuchus,
- Kunpengopterus
- Kwangsisaurus Young, 1959 †
- Kwangsisaurus,
- Kyrgyzsaurus,
- Lacertilia,
- Lacertulus,
- Laemanctus,
- Laganosuchus Sereno & Larsson, 2009 †
- Lagerpeton
- Lagerpetonidae
- Lagosuchia,
- Lagosuchidae †
- Lagosuchus talampayensis,
- Lagosuchus,
- Lamarquesaurus,
- Lamiasaurus,
- Lanthanolania,
- Laonogekko,
- Laopteryx priscus,
- Laopteryx,
- Largocephalosaurus Cheng et al., 2012 †
- Largocephalosaurus,
- Lariosauridae,
- Lariosaurus Curinoi, 1847 †
- Lazarussuchus,
- Leiocephalus,
- Leiosaurinae,
- Leiosaurus,
- Lepidosauria
- Lepidosauria,
- Lepidosauriformes,
- Lepidosauromorpha
- Lepidosauromorpha,
- Leptocleididae White, 1940 †
- Leptocleidus Andrews, 1922 †
- Leptonectes McGowan, 1996 †
- Leptopterygiidae Kuhn, 1934 †
- Leptosuchomorpha,
- Leptosuchus,
- Lestophis,
- Leurospondylus Brown, 1913 †
- Lewisuchinae,
- Lewisuchus,
- Lianghusuchus †
- Liaoningopterus Wang & Zhou, 2003 †
- Liaoxipterus Dong & Lü, 2005 †
- Liaoxisaurus,
- Libonectes Carpenter, 1997 †
- Libycosuchidae †
- Libycosuchus †
- Limnosaurus †
- Liopleurodon Sauvage, 1873 †
- Listromycter,
- Liushusaurus,
- Lonchodectes Hooley, 1913 †
- Lonchodectidae Unwin et al., 2000 †
- Lonchognathosaurus Maisch, Matzke & Sun, 2004 †
- Longisquamidae,
- Lophocranion,
- Lophoprosopus,
- Louisamphisbaena,
- Lucianosaurus,
- Ludodactylus Frey, Martill & Buchy, 2003 †
- Lutkesaurus,
- Lutungutali,
- Lygodactylus,
- Machaeroprosopus,
- Machimosaurus †
- Macronychoptera,
- Macroplacus Schubert-Klempnauer, 1975 †
- Macroplacus,
- Macroplata Swinton, 1930 †
- Macrorhineura,
- Mahajangasuchidae Sereno & Larsson, 2009 †
- Mahajangasuchus Buckley & Brochu, 1999 †
- Malerisaurus Chatterjee, 1980 †
- Malutinisuchus,
- Marasuchus,
- Maresaurus Gasparini, 1997 †
- Marmoretta,
- Massaliasuchus Martin & Buffetaut, 2008 †
- Mauisaurus Hector, 1874 †
- Mecistops Gray, 1844
- Mecistotrachelos,
- Megachirella
- Megacnemus,
- Megadontosuchus †
- Megalancosauridae,
- Megalancosaurinae
- Megalneusaurus Knight, 1898 †
- Megalosaurus terquemi,
- Melanosuchus Gray, 1825
- Mesadactylus Jensen & Padian, 1989 †
- Mesenosauridae †
- Mesenosauridae,
- Mesodapedon,
- Mesosuchia †
- Mesosuchidia,
- Metanothosaurus Yabe & Shikama, 1948 †
- Metanothosaurus,
- Metriorhynchidae Fitzinger, 1843 †
- Metriorhynchus Meyer, 1830 †
- Microchampsa †
- Microcleidus Watson, 1909 †
- Microcnemus Huene, 1940 †
- Microleptosaurus,
- Microlophus,
- Microsuchus †
- Mimeosaurini,
- Mimeosaurus,
- Miodentosaurus Cheng et al., 2007 †
- Mixosauridae Baur, 1887 †
- Mixosaurus Baur, 1887 †
- Montanazdarcho Padian, de Ricqlès & Horner, 1995 †
- Monjurosuchidae,
- Monjurosuchus,
- Morenosaurus Welles, 1943 †
- Morunasius
- Muraenosauridae,
- Muraenosaurus Seeley, 1847 †
- Mycterosuchus †
- Myrmecodaptria,
- Mystriosuchidae,
- Mythunga Molnar & Thulborn, 2008 †
- Namuncurania,
- Nanchangasaurus,
- Nanchangosauridae Wang, 1959 †
- Nanchangosauridae,
- Nanchangosauridae,
- Nanchangosaurus
- Nanchangosaurus
- Nanchangosaurus Wang, 1959 †
- Nasodactylus Colbert, 1969 †
- Nectosaurus Merriam, 1905 †
- Negevodus,
- Nemicolopterus Wang et al., 2008 †
- Neoarchosauria,
- Neochoristodera,
- Neodiapsida
- Neoplesiosauria,
- Nettosuchinae †
- Nettosuchus †
- Neusticosauridae,
- Neusticosaurus Seeley, 1882. †
- Neustosaurus †
- Nichollssaura Druckenmiller & Russell, 2009 †
- Ningchengopterus Lü J., 2009 †
- Noripterus Young, 1973 †
- Normannognathus Buffetaut, J.J. LePage & G. LePage, 1998 †
- Noteosuchidae,
- Noteosuchus,
- Nothochampsa †
- Nothosauria Baur, 1889 †
- Nothosauria,
- Nothosauridae Baur, 1889 †
- Nothosauridae,
- Nothosauriformes,
- Nothosaurinae,
- Nothosauroidea,
- Nothosaurops,
- Nothosaurus cuvieri,
- Nothosaurus Münster, 1834 †
- Nothosaurus occiduus
- Nothosaurus picardi,
- Nothosaurus,
- Notocaiman †
- Notochampsidae †
- Notosuchidae †
- Notosuchus Woodward, 1896 †
- Novialoidea,
- Nurhachius Wang, Kellner, Zhou & de Almeida Campos, 2005 †
- Nyctosaurus Marsh, 1876 †
- Occitanosaurus Bardet, Godefroit & Sciau, 1999 †
- Ocoyuntaia arquata,
- Ocoyuntaia,
- Ogmodirus Williston & Moodie, 1913
- Oligodontosauridae,
- Oligodontosaurus
- Olindalacerta,
- Omoiotyphlops,
- Omphalosauridae Merriam, 1906 †
- Ophthalmosaurus Seeley, 1874 †
- Opluridae,
- Oplurus
- Orithyia
- Ornithocephalidae,
- Ornithocheiridae Seeley, 1870 †
- Ornithocheiroidea Seeley, 1901 †
- Ornithocheirus Seeley, 1869 †
- Ornithodira,
- Ornithosoma Seeley, 1871 †
- Ornithosuchia Huene, 1908 †
- Ornithosuchia,
- Ornithosuchidae Huene, 1908 †
- Ornithosuchus Newton, 1894 †
- Orophosaurus,
- Orovenator,
- Osmolskina,
- Osteolaemus Cope, 1861
- Ototriton,
- Oweniasuchus †
- Oxysdonsaurus †
- Pachycostasaurus Cruickshank, Martill & Noe, 1996 †
- Pachypleurosauria,
- Pachypleurosauridae Nopcsa, 1928 †
- Pachypleurosauroidea,
- Pachypleurosaurus,
- Pachystropheus,
- Paikasisaurus,
- Palacrodon,
- Palaeagama,
- Palaeoblanus,
- Palaeochamaeleo,
- Palaeoctonus,
- Palaeocursornis,
- Palaeolacerta
- Palaeophidae,
- Palaeosauriscus,
- Palaeosaurus cylindrodon,
- Palaeosaurus priscus,
- Palatodonta,
- Paleorhinus,
- Paleosuchus Gray, 1862
- Paliguana,
- Paliguanidae,
- Pallimnarchus †
- Pallisteria,
- Pamelaria,
- Pamelina,
- Paradipsosaurus,
- Parahupehsuchus
- Parahupehsuchus Chen et al., 2014 †
- Paralligaroridae †
- Paralligator †
- Paralonectes Nicholls & Brinkman, 1993 †
- Paramacellodidae,
- Paraplacodontidae Peyer & Kuhn-Schnyder, 1955 †
- Paraplacodontidae,
- Paraplacodus
- Paraplacodus Peyer, 1931 †
- Paraplacosauriops,
- Parapsicephalus
- Parapsicephalus Arthaber, 1918 †
- Pararcus,
- Parasaurillus,
- Parasauromalus,
- Parasuchidae
- Parasuchinae,
- Parasuchus Lydekker, 1885 †
- Parasuchus,
- Paratrisauropus,
- Pariguana,
- Paroedura,
- Parrishia,
- Parthanosaurus,
- Parvinatator Nicholls & Brickman, 1995 †
- Parviraptor,
- Patricosaurus,
- Pedeticosaurus †
- Peipehsuchus †
- Peirosaurus †
- Pelagosaurus †
- Peloneustes Lydekker, 1889 †
- Pelycosimia,
- Perparvus,
- Pessosaurus Wiman, 1910 †
- Peteinosaurus
- Peteinosaurus Wild, 1978 †
- Petrolacosauridae †
- Petrolacosauridae,
- Petrolacosaurus †
- Petrolacosaurus,
- Petrosuchus †
- Phalarodon Merriam, 1910 †
- Phelsuma,
- Philydrosaurus,
- Phobetor Bakhurina, 1982 †
- Pholidosauridae †
- Pholidosaurus †
- Phosphatodraco Pereda Suberbiola, et al., 2003 †
- Phrynosoma,
- Phrynosomatidae,
- Phrynosomatinae,
- Phrynosomimini
- Phrynosomimus,
- Phygosaurus,
- Phyllodactylus,
- Phytosauria
- Phytosauria Meyer, 1861 †
- Phytosauridae Jaeger, 1828 †
- Phytosauridae,
- Phytosaurus,
- Picrodon,
- Pistosauria,
- Pistosauridae Baur, 1887-1890 †
- Pistosauridae,
- Pistosauroidea,
- Pistosaurus Meyer, 1839 †
- Pistosaurus,
- Placochelyida,
- Placochelyidae Jaekel, 1907 †
- Placochelyidae,
- Placochelys Jaekel, 1902 †
- Placochelys,
- Placodontia
- Placodontia Cope, 1871 †
- Placodontidae
- Placodontidae Cope, 1871 †
- Placodontiformes,
- Placodontoidea
- Placodus
- Placodus Agazzis, 1833 †
- Planocephalosaurus,
- Plataleorhynchus Howse & Milner, 1995 †
- Plateosaurus ornatus,
- Platydactylus,
- Platyognathidae †
- Platyognathidae,
- Platyognathus †
- Platyrhachis,
- Platysuchus †
- Plesiopleurodon Carpenter, 1996 †
- Plesiorhineura,
- Plesiosauria
- Plesiosauria Blainville, 1835 †
- Plesiosauridae Gray, 1825 †
- Plesiosauroidea,
- Plesiosaurus,
- Pleurodonta
- Pleurodontagama
- Pleurodontagaminae
- Pleurodontagamini
- Pleurosauri,
- Pleurosauridae,
- Pleurosaurus,
- Plica,
- Pliosauridae Seeley, 1874 †
- Pliosauridae,
- Pliosauroidea,
- Pliosaurus Owen, 1841 †
- Podopterygidae,
- Polrussia,
- Polychrotidae,
- Polychrus,
- Polycotylidae Williston, 1909 †
- Polycotylus Cope, 1869 †
- Polyglyphanodontia,
- Polyodontobaena
- Polyodontobaenidae,
- Polyptychodon Owen, 1841 †
- Polyptychodon,
- Pontopus,
- Poposauridae Nopsca, 1928 †
- Posphatosaurus †
- Postosuchus Chatterjee, 1985 †
- Pravusuchus,
- Preondactylus Wild, 1984 †
- Preondactylus,
- Prestosuchidae Romer, 1966 †
- Prestosuchus Huene, 1942 †
- Priscagama,
- Priscagaminae,
- Priscagamini
- Priscochelys,
- Pristichampsinae †
- Pristichampsus †
- Pristiguana,
- Procaiman †
- Prodiplocynodon †
- Prolacerta,
- Prolacertidae †
- Prolacertidae,
- Prolacertiformes,
- Prolacertilia,
- Prolacertoides,
- Proneusticosaurus
- Protecovasaurus,
- Protenodontosaurus Pinna, 1990 †
- Protenodontosaurus,
- Proterochampsa †
- Proterochampsa,
- Proterochampsia,
- Proterochampsidae †
- Proterochampsidae,
- Proterosauria,
- Proterosuchia,
- Proterosuchidae Huene, 1914 †
- Proterosuchidae,
- Proterosuchus Broom, 1903 †
- Proterosuchus,
- Protoichthyosauridae Appleby, 1979 †
- Protoichthyosaurus Appleby, 1979 †
- Protome,
- Protorhineura,
- Protorosauria Lydekker, 1888 †
- Protorosauria,
- Protorosauridae †
- Protorosauridae,
- Protorosaurus Meyer, 1830 †
- Protosuchia Mook, 1934 †
- Protosuchidae Brown, 1934 †
- Protosuchus Brown, 1934 †
- Psephochelys
- Psephoderma
- Psephoderma Meyer, 1858 †
- Psephosauriscus
- Psephosaurus
- Psephosaurus Brotzen, 1957 †
- Pseudhesperosuchus †
- Pseudolagosuchus,
- Pseudopalatinae
- Pseudopalatus,
- Pseudosaurillus,
- Pseudosuchia,
- Pseudotinosaurus
- Psilotrachelosaurus
- Pteraichnidae,
- Pteranodon Marsh, 1876 †
- Pteranodontoidea,
- Pterodactylidae Bonaparte, 1838 †
- Pterodactyloidea Plieninger, 1901 †
- Pterodactyloidea,
- Pterodactylus Cuvier, 1809 †
- Pterodaustriidae Bonaparte, 1971 †
- Pterodaustro Bonaparte, 1969 †
- Pterorhynchus Czerkas & Ji, 2002 †
- Pterosauria
- Pterosauria Kaup, 1834 †
- Pterosauromorpha
- Pterosuchia †
- Puntanipterus Bonaparte & Sanchez, 1974 †
- Purranisaurus †
- Pygopodidae
- Qianxisaurus,
- Queironius,
- Quetzalcoatlus Lawson, 1975 †
- Raeticodactylus
- Raeticodactylus Stecher, 2008 †
- Ramphostomopsis †
- Rauisuchia Huene, 1942 †
- Rauisuchidae Huene, 1936 †
- Rautiania,
- Razanandrongobe,
- Rebbanasaurus,
- Redondasaurus
- Rhabdopelix
- Rhabdopelix longispinis,
- Rhabrosaurus †
- Rhadinosuchus,
- Rhamphinion,
- Rhamphocephalus Seeley, 1880 †
- Rhamphorhynchidae Seeley, 1870 †
- Rhamphorhynchoidea Carroll, 2000 †
- Rhamphorhynchoidea,
- Rhamphorhynchus Meyer, 1846 †
- Rhamphosuchus Lydekker, 1886 - beak crocodile †
- Rhineura,
- Rhineuridae,
- Rhineurinae
- Rhineuroidea
- Rhodanogekko,
- Rhomaleosauridae (Nopsca, 1928) †
- Rhomaleosauridae,
- Rhomaleosaurus Seeley, 1874 †
- Rhombopholis
- Rhynchocephalia
- Rhynchocephalichnus,
- Rhynchosauria †
- Rhynchosauria,
- Rhynchosauridae †
- Rhynchosauroidea
- Rhynchosauroides,
- Rhytisodon †
- Rileya,
- Rutiodon
- Rutiodontidae,
- Sacisaurus,
- Saichangurvel,
- Saltoposuchidae †
- Saltoposuchus †
- Saltopus,
- Sanchiaosaurus Young, 1965 †
- Saniwa australis,
- Santaisaurus,
- Santanadactylus de Buisonje, 1980 †
- Sapheosauridae,
- Sarcosuchus Broin & Taquet, 1966 †
- Sarmatosuchus,
- Sauranodonti,
- Sauria,
- Sauria,
- Sauroeidepus,
- Sauromalus,
- Sauropithecoides
- Sauropterygia †
- Sauropterygia,
- Saurosphargidae Li et al., 2011 †
- Saurosphargidae,
- Saurosphargis Frech, 1903 †
- Saurosphargis,
- Saurosternidae,
- Saurosternon
- Scandensia,
- Scaphognathidae,
- Scaphognathus Wagner, 1861 †
- Scarrisaurus,
- Sceloporus,
- Scincogekkonomorpha,
- Scleroglossa,
- Scleromochlidae
- Scleromochlidae Huene, 1914 †
- Scleromochlus Woodward, 1907 †
- Scleromochlus,
- Sebecidae †
- Sebecus †
- Seemannia palaeotriadica,
- Seemannia,
- Serpianosaurus Rieppel, 1989 †
- Shamosuchus †
- Shansisuchidae,
- Shansisuchus heiyuekouensis,
- Shansisuchus,
- Sharivopterygia,
- Sharovipteryx
- Shastasauridae Merriam, 1895 †
- Shastasaurinae Merriam, 1908 †
- Shastasaurus Merriam, 1895 †
- Shenzhoupterus Lü et al., 2008 †
- Shimmelia,
- Shokawa
- Shonisaurus Camp, 1976 †
- Sikannisuchus,
- Silesauridae
- Silesaurus,
- Simiosauria,
- Simoedosauridae,
- Simoedosaurus,
- Simolestes Andrews, 1909 †
- Simosauria
- Simosauridae Romer, 1965 †
- Simosaurus Meyer, 1842 †
- Simosuchus †
- Sinocyamodus
- Sinocyamodus Chun, 2000 †
- Sinopliosaurus G. Young, 1820 †
- Sinopterus Wang & Zhou, 2003 †
- Sinosaurosphargis
- Sinosaurosphargis Li et al., 2011 †
- Siroccopteryx Mader & Kellner, 1999 †
- Smilosuchus,
- Smok,
- Sokotosaurus †
- Sophineta
- Sordes Sharov, 1971 †
- Spathorhynchus
- Sphaerodactylus,
- Sphagesauridae †
- Sphagesaurus †
- Sphenocondor,
- Sphenodonta,
- Sphenodontia
- Sphenodontidae,
- Sphenosuchia †
- Sphenosuchidae †
- Sphenosuchus †
- Sphodrosaurus,
- Spinoaequalis
- Spinosuchus,
- Squamata
- Stagonolepididae Lydekker, 1887 †
- Stegomosuchus †
- Stellio,
- Steneosaurus †
- Stenocercus,
- Stenopterygiidae Kuhn, 1934 †
- Stenopterygius Jaekel, 1904 †
- Sthenarosaurus Watson, 1909 †
- Stomatosuchidae †
- Stomatosuchus †
- Stomerosuchus †
- Stratesaurus,
- Strigosuchus licinus,
- Strigosuchus,
- Styxosaurus Welles, 1943 †
- Suchoprion,
- Sulcusuchus Gasparini & Spalletti, 1997 †
- Sulmosaurus,
- Suzanniwana,
- Swainiguanoides,
- Symptosuchus †
- Tamaulipasaurus,
- Tanaisosaurus
- Tangasauridae †
- Tanystropheidae Gervais, 1858 †
- Tanystropheidae,
- Tanystropheus Meyer, 1855 †
- Tanytrachelos Olsen, 1979 †
- Tapejara Kellner, 1989 †
- Tapejaridae Kellner, 1989 †
- Taphrosaurus,
- Tarentola,
- Tarjadia
- Tasmaniosaurus
- Tchoiria
- Technosaurus
- Tecovasaurus,
- Tedorosaurus,
- Teleidosaurus †
- Teleocrater
- Teleorhinus †
- Teleosauridae †
- Teleosaurus †
- Temujinia,
- Tendaguripterus Unwin & Heinrich, 1999 †
- Teraterpetidae,
- Teraterpeton,
- Teratosaurus Von Meyer, 1861 †
- Terminonatator Sato, 2003 †
- Terrestrisuchus †
- Thaisaurus Mazin, Suteethorn, Buffenaut, Jaeger & Helmcke-Ingavat, 1991 †
- Thalassiodracon Storrs & Taylor, 1996 †
- Thalassodromeus Kellner & de Almeida Campos, 2002 †
- Thalassomedon Welles, 1943 †
- Thalattosauria †
- Thalattosauria,
- Thalattosauridae Merriam, 1905 †
- Thalattosauridae,
- Thalattosauriformes,
- Thalattosauroidea
- Thalattosaurus Merriam, 1904 †
- Thecadactylus,
- Thecodontia †
- Thecodontia,
- Theropodomorpha
- Thililua Bardet, Pereda Suberbiola & Jalil, 2003 †
- Thoracosaurus †
- Tienosuchus †
- Tikiguania,
- Tingitana,
- Tinosaurus,
- Tomistoma Müller, 1846
- Trachelosaurus
- Tremamesacleididae,
- Trematochamsidae †
- Trialestia †
- Trialestidae †
- Tricleidus Andrews, 1909 †
- Tricuspisaurus,
- Trilophosauria †
- Trilophosauria,
- Trilophosauridae
- Trilophosauridae †
- Trilophosaurus,
- Trinacromerum Cragin, 1888 †
- Trogonophis
- Tropidosuchus
- Tropidosuchus †
- Tropiduridae
- Tropidurus
- Tuarangisaurus Wiffen & Moisley, 1986 †
- Tupuxuara Kellner & Campos, 1988 †
- Uatchitodon,
- Umoonasaurus Kear, Schroeder & Lee, 2006 †
- Uralosaurus,
- Uromasticini
- Uromastycinae,
- Uromastyx,
- Uronautes Cope, 1876 †
- Uronautes,
- Urosaurus,
- Uruguaysuchidae †
- Uruguaysuchus †
- Uta,
- Utahdactylus
- Utatsusauridae McGowan & Motani, 2003 †
- Utatsusaurus Shikama, Kamei & Murata, 1978 †
- Vancleavea,
- Variodens
- Vastanagama
- Venaticosuchus Bonaparte, 1970 †
- Vialorophis,
- Vjushkovia
- Vjushkovia
- Vjushkoviidae
- Voay Brochu, 2007 †
- Volgadraco Averianov et al., 2008 †
- Vritramimosaurus
- Wangisuchus
- Wannia
- Wapitisaurus
- Weigeltisauridae,
- Whitakersaurus
- Woolungasaurus Persson, 1960 †
- Wukongopteridae
- Wumengosaurus
- Wurnosaurus †
- Wyomingopteryx †
- Xestops gracilis,
- Xianglong
- Xihaina
- Xinpusaurus Yin in Yin et al., 2000 †
- Yabeinosaurus youngi
- Yabeinosaurus,
- Yantarogekko
- Yonghesuchus,
- Youngina
- Youngina,
- Younginidae †
- Younginiformes
- Younginoidea
- Yunguisaurus
- Yuzhoupliosaurus Zhang, 1985 †
- Zanclodon
- Zapsosaurus
- Zarcasaurus
- Zhejiangopterus Cai & Feng, 1994 †
- Zonosaurus