Acanthardus accepted as Acantharchus Gill, 1864 (name verified source)
Acanthochisma accepted as Acanthochiasma Krohn in Haeckel, 1861 (name verified source)
Acanthonosus accepted as Acanthonotus Bloch & Schneider, 1801 accepted as Notacanthus Bloch, 1788 (name verified source)
Acanthophtalmus accepted as Cobitis Linnaeus, 1758 (name verified source)
Acanthopis accepted as Acanthopus Oken, 1816 (name verified source)
Acanthopthalmus accepted as Cobitis Linnaeus, 1758 (name verified source)
Acanthoscybium accepted as Acanthocybium Gill, 1862 (name verified source)
Acerdon accepted as Acerodon Jourdan, 1837 (name verified source)
Acestorhynchus accepted as Acestrorhynchus Eigenmann & Kennedy, 1903 (name verified source)
Acidotheres accepted as Acridotheres Vieillot, 1816 (name verified source)
Aconthocepola accepted as Acanthocepola Bleeker, 1874 (name verified source)
Acranthophis accepted as Acrantophis Jan, 1863 (name verified source)
Acreichtyes accepted as Acreichthys Fraser-Brunner, 1941 (name verified source)
Acrosocheilus accepted as Acrossocheilus Oshima, 1919 (name verified source)
Actaeon de Montfort, 1810 accepted as Acteon Montfort, 1810 (name verified source)
Acthogobius accepted as Acanthogobius Gill, 1859 (name verified source)
Actinerus accepted as Actinernus Verrill, 1879 (name verified source)
Adinias accepted as Adinia Girard, 1859 (name verified source)
Aenigomatolimnas accepted as Aenigmatolimnas Peters, 1933 (name verified source)
Aeschirichthys accepted as Aeschrichthys Macleay, 1883 accepted as Cestraeus Valenciennes in Cuvier & Valenciennes, 1836 (name verified source)
Aetheloperca accepted as Aethaloperca Fowler, 1904 (name verified source)
Aethiopacris La Greca, 1994 accepted as Aethiopiacris La Greca, 1994 (name verified source)
Aetomylus accepted as Aetomylaeus Garman, 1908 (name verified source)
Aextoxicum accepted as Aextoxicon Ruiz & Pavón, 1794 (name verified source)
Ageneisus accepted as Ageneiosus Lacepède, 1803 (name verified source)
Agostoschizomus accepted as Agastoschizomus Rowland, 1971 (name verified source)
Ailiichthya accepted as Ailia Gray, 1830 (name verified source)
Albaliella accepted as Abaliella Strand, 1928 (name verified source)
Aldrovandra accepted as Aldrovanda Linnaeus, 1753 (name verified source)
Alectes accepted as Alectis Rafinesque, 1815 (name verified source)
Alphaniops accepted as Aphaniops Hoedeman, 1951 (name verified source)
Alphanius accepted as Aphanius Nardo, 1827 (name verified source)
Aluacomnium accepted as Aulacomnium Schwägrichen, 1827 (name verified source)
Amaurochaetae accepted as Amaurochaete Rostafinski, 1873 (name verified source)
Ambligaster accepted as Amblygaster Bleeker, 1849 (name verified source)
Amblycerus accepted as Amblycercus Cabanis in Cabanis & Heine, 1851 (name verified source)
Amblycirrhites accepted as Amblycirrhitus Gill, 1862 (name verified source)
Amblygliphidodon accepted as Amblyglyphidodon Bleeker, 1877 (name verified source)
Amblyglyphisodon accepted as Amblyglyphidodon Bleeker, 1877 (name verified source)
Amblyogaster accepted as Amblygaster Bleeker, 1849 (name verified source)
Amblypharngodon accepted as Amblypharyngodon Bleeker, 1860 (name verified source)
Amblyrhinchotes accepted as Amblyrhynchotes Troschel, 1856 (name verified source)
Amblyrhinchotus accepted as Amblyrhynchotes Troschel, 1856 (name verified source)
Ambyglyphidodon accepted as Amblyglyphidodon Bleeker, 1877 (name verified source)
Ameirus accepted as Ameiurus Rafinesque, 1820 (name verified source)
Ammania accepted as Ammannia Linnaeus, 1753 (name verified source)
Ammochryptocharax accepted as Ammocryptocharax Weitzman & Kanazawa, 1976 (name verified source)
Amoeboidium accepted as Amoebidium Cienkowsky, 1861 (name verified source)
Amphipholus accepted as Amphipholis Ljungman, 1866 (name verified source)
Anamalops accepted as Anomalops Kner, 1868 (name verified source)
Anamses accepted as Amanses Gray, 1835 (name verified source)
Anarhichthys accepted as Anarrhichthys Ayres, 1855 (name verified source)
Anatogaster accepted as Anotogaster Selys, 1854 (name verified source)
Anchovella accepted as Anchoviella Fowler, 1911 (name verified source)
Ancistris accepted as Ancistrus Kner, 1854 (name verified source)
Andraea accepted as Andreaea J. Hedwig, 1801 (name verified source)
Andreaobryum accepted as Andreaeobryum W.C. Steere & B.M. Murray, 1976 (name verified source)
Aneistrus accepted as Ancistrus Kner, 1854 (name verified source)
Aniostremus accepted as Anisotremus Gill, 1861 (name verified source)
Anisognatus accepted as Anisognathus Reichenbach, 1850 (name verified source)
Annomatophasma accepted as Anommatophasma Mees, 1962 accepted as Ophisternon McClelland, 1844 (name verified source)
Anodontasoma accepted as Anodontostoma Bleeker, 1849 (name verified source)
Anomalochus accepted as Anomochilus Berg, 1901 (name verified source)
Anomalurops accepted as Anomalurus Waterhouse, 1843 (name verified source)
Antarctopthirus accepted as Antarctophthirus Enderlein, 1906 (name verified source)
Antecheinomys accepted as Antechinomys Krefft, 1867 (name verified source)
Antenarius accepted as Antennarius Daudin, 1816 (name verified source)
Antionetta accepted as Antonietta Schmekel, 1966 (name verified source)
Aphanomycapsis accepted as Aphanomycopsis A. Scherffel, 1925 (name verified source)
Aphyocarax accepted as Aphyocharax Günther, 1868 (name verified source)
Aphyra accepted as Aphia Risso, 1827 (name verified source)
Apisoma accepted as Apiosoma Blanchard, 1885 (name verified source)
Apistrogramma accepted as Apistogramma Regan, 1913 (name verified source)
Aplidonotus accepted as Aplodinotus Rafinesque, 1819 (name verified source)
Aplopappus Cassini in F. Cuvier, 1828 accepted as Haplopappus Cassini in F. Cuvier, 1828 (name verified source)
Apogonichtyes accepted as Apogonichthys Bleeker, 1854 (name verified source)
Aporopristis accepted as Leiosaurus Duméril & Bibron, 1837 (name verified source)
Aprocryptodon accepted as Apocryptodon Bleeker, 1874 (name verified source)
Apsilius accepted as Apsilus Valenciennes in Cuvier & Valenciennes, 1830 (name verified source)
Apterichthus accepted as Apterichtus Duméril, 1805 (name verified source)
Aptogale accepted as Solenodon Brandt, 1833 (name verified source)
Arapaema accepted as Arapaima Müller, 1843 (name verified source)
Arbarenicola accepted as Abarenicola Wells, 1959 (name verified source)
Archegetes Leuckart, 1878 accepted as Archigetes Leuckart, 1878 (name verified source)
Archeolaemus accepted as Archolaemus Korringa, 1970 (name verified source)
Archilocus accepted as Archilochus Reichenbach, 1854 (name verified source)
Archirus accepted as Achirus Lacepède, 1802 (name verified source)
Architeuthius accepted as Architeuthis Steenstrup, 1857 (name verified source)
Arctacamella accepted as Artacamella Hartman, 1955 (name verified source)
Arctogalidea accepted as Arctogalidia Merriam, 1897 (name verified source)
Ardissonia accepted as Ardissonea De Notaris, 1870 (name verified source)
Argiosomus accepted as Argyrosomus De la Pylaie, 1835 (name verified source)
Argyropelachus accepted as Argyropelecus Cocco, 1829 (name verified source)
Argyropelacus accepted as Argyropelecus Cocco, 1829 (name verified source)
Arias accepted as Arius Valenciennes in Cuvier & Valenciennes, 1840 (name verified source)
Arioma accepted as Ariomma Jordan & Snyder, 1904 (name verified source)
Ariostomias accepted as Aristostomias Zugmayer, 1913 (name verified source)
Arium accepted as Arius Valenciennes in Cuvier & Valenciennes, 1840 (name verified source)
Armillifera accepted as Armillifer Sambon, 1922 (name verified source)
Arsinotherium † accepted as Arsinoitherium Beadnell, 1902 † (name verified source)