Abyssocypris van den Bold, 1974 (current name source)
Acallapisus Schönherr, 1825 accepted as Acallopistus Schönherr, 1826 (current name source)
Acalypha brachiata E. Mey. accepted as Acalypha ecklonii Baill. (current name source)
Acalypha castaneifolia Poepp. ex Pax & K. Hoffm. accepted as Acalypha cuneata Poepp. (current name source)
Acalypha cordata E. Mey. accepted as Acalypha ecklonii Baill. (current name source)
Acalypha cupricola Robyns accepted as Acalypha dikuluwensis P.A. Duvign. & Dewit (current name source)
Acalypha discolor Bojer accepted as Acalypha integrifolia Willd. (current name source)
Acalypha goyazensis Glaz. accepted as Acalypha vellamea Baill. (current name source)
Acalypha hystrix Balb. ex Spreng. accepted as Acalypha aristata Kunth (current name source)
Acalypha languida E. Mey. accepted as Acalypha brachiata Krauss (current name source)
Acalypha longifolia Baill. accepted as Acalypha cuneata Poepp. (current name source)
Acalypha obtusata Spreng. ex Steud. accepted as Adenocline violifolia (Kunze) Prain (current name source)
Acalypha velutina E. Mey. accepted as Acalypha glabrata Thunb. (current name source)
Acanthalburnus Berg, 1916 (current name source)
Acanthapseudes Roman, 1976 (current name source)
Acantheurypon Topsent, 1927 (current name source)
Acanthocanthopsis Heegaard, 1945 (current name source)
Acanthometron Haeckel, 1887 (current name source)
Acanthoniscus White, 1847 accepted as Acanthoniscus Kinahan, 1859 (current name source)
Acanthonotozomatidae Stebbing, 1906 (current name source)
Acanthonotus Cuvier, 1800 accepted as Mystacoleucus Günther, 1868 (current name source)
Acanthophis lancasteri Wells & Wellington accepted as Acanthophis rugosus Loveridge, 1948 (current name source)
Acanthopleurus Egerton, 1841 † accepted as Acanthopleurus Agassiz, 1844 † (current name source)
Acanthoplichthys Fowler, 1943 (current name source)
Acanthorhodeus chankaensis (Dybowski, 1872) (current name source)
Acanthorhynchia Buckman, 1914 † accepted as Acanthorhynchia Buckman, 1917 † (current name source)
Acastopyge Tomczykowa & Tomczyk, 1970 † accepted as Acastopyge Tomcyzkowa, 1971 † (current name source)
Acentrolophus Nardo, 1827, nom. nud. accepted as Centrolophus Lacepède, 1802 (current name source)
Acestrus Agassiz, 1845 † accepted as Acestrus Woodward, 1901 † (current name source)
Achelous De Haan in Siebold, 1833 (current name source)
Acherontiellina Delamare-Deboutteville, 1948 accepted as Acherontiella Absolon, 1913 (current name source)
Achras brasiliensis Willd. ex Steud. accepted as Sarcaulus brasiliensis (A. DC.) Eyma (current name source)
Achras glaucescens Willd. ex Steud. accepted as Pouteria macrophylla (Lam.) Eyma (current name source)
Achrus Dejean, 1821 accepted as Lixus Fabricius, 1801 (current name source)
Achtheinus Wilson, 1908 (current name source)
Acideres Guérin-Méneville, 1858 accepted as Acideres Thomson, 1860 (current name source)
Acioa tessmannii Engl. accepted as Dactyladenia letestui (Letouzey) Prance & F. White (current name source)
Aclees Schönherr, 1833 accepted as Aclees Schönherr, 1835 (current name source)
Acmaea Eschscholtz in Kotzebue, 1830 accepted as Acmaea Eschscholtz, 1833 (current name source)
Acoelodus Ameghino, 1897, nom. nud. † accepted as Acoelodus Ameghino, 1897 † (current name source)
Acontias lineatus Wagler, 1830 accepted as Ramphotyphlops lineatus Boie, 1827 (current name source)
Acontias subcaecus Duméril & Bibron, 1839 accepted as Dibamus novaeguineae Duméril & Bibron, 1839 (current name source)
Acorynus Dejean, 1821 accepted as Mesocordylus Lacordaire, 1866 (current name source)
Acosmetia Stephens, 1829 accepted as Acosmetia Stephens, 1830 (current name source)
Acreuciroa Jaeckel & Thiele, 1931 (current name source)
Acridophagus Evenhuis, 1983 (current name source)
Acrochaetium implicatum (Drew) Aziz, 1965 accepted as Audouinella vaga (Drew) Garbary, Hansen & Scagel, 1983 accepted as Acrochaetium vagum (K.M. Drew) C.-C. Jao, 1937 (current name source)
Acrocosmia Koken, 1896 † accepted as Acrocosmia Koken, 1897 † (current name source)
Acropetes Geoffroy in Guérin-Méneville, 1844 accepted as Phalangista Geoffroy & Cuvier, 1795 accepted as Phalanger Storr, 1780 (current name source)
Acrostoma D.F. Didrichsen accepted as Remijia A.P. de Candolle, 1829 (current name source)
Acrotherium Pomel, 1848 † accepted as Nesodon Owen, 1847 † (current name source)
Actebia Stephens, 1828 accepted as Actebia Stephens, 1829 (current name source)
Acteocinidae Dall, 1913 † (current name source)
Actinoconchus M'Coy in Griffith, 1842 † accepted as Actinoconchus M'Coy, 1844 † (current name source)
Actinostemon cantagallensis Glaz. accepted as Actinostemon concolor (Spreng.) Müll. Arg. (current name source)
Actinostemon tortuosus Glaz. accepted as Actinostemon concolor (Spreng.) Müll. Arg. (current name source)
Actinotaenium (Nägeli) Schellenberg, 1897 (current name source)
Actitis Illiger, 1811 (current name source)
Actobranchus McIntosh, 1922 accepted as Octobranchus Marion & Bobretzky, 1875 (current name source)
Actoea A. Milne-Edwards, 1873 (current name source)
Aculeonchus Kreis, 1928 (current name source)
Acutiramus Harris & Robertson, 1994 accepted as Porcellidium Claus, 1860 (current name source)
Adapis Cuvier, 1822, nom. nud. † accepted as Adapis Cuvier, 1822 † (current name source)
Addax Rafinesque, 1815 accepted as Addax Laurillard, 1841 (current name source)
Adelobothrium Shipley in Willey, 1900 (current name source)
Adenogyne discolor Klotzsch accepted as Sebastiania commersoniana (Baill.) L.B. Sm. & Downs (current name source)
Adenogyne marginata Klotzsch accepted as Sebastiania commersoniana (Baill.) L.B. Sm. & Downs (current name source)
Adexius Schönherr, 1833 accepted as Adexius Schoenherr, 1834 (current name source)
Adioristidius Voss, 1954 accepted as Adioristidius Morrone, 1994 (current name source)
Adrimus Dejean, 1836 accepted as Adrimus Bates, 1872 (current name source)
Adrius Dejean, 1821 accepted as Omias Germar, 1817 (current name source)
Aedoplophora Grandjean, 1932 (current name source)
Aegagropila Kützing, 1843 (current name source)
Aegidium Dejean, 1833 accepted as Aegidium Blanchard, 1845 (current name source)
Aegle De Haan in Siebold, 1833 (current name source)
Aenanthe Pallas, 1771 accepted as Oenanthe Vieillot, 1816 (current name source)
Aequispirella Finlay, 1924 † (current name source)
Aequiyoldia Soot-Ryen, 1951 (current name source)
Aeridium R.A. Salisbury, 1812 accepted as Aerides Loureiro, 1790 (current name source)
Aëronaea Agassiz, 1846 accepted as Aeronaea Agassiz, 1846 accepted as Aerenaea Dejean, 1835 accepted as Aerenea Thomson, 1857 (current name source)
Aeshnidae Leach, 1815 (current name source)
Aesthetydeus André, 1979 accepted as Aesthetydeus André, 1980 (current name source)
Afrololigo Brakoniecki, 1986 (current name source)
Afrophrynus Lawrence, 1967 accepted as Xerophrynus Weygoldt, 1996 (current name source)
Afrotis Bonaparte, 1854 accepted as Eupodotis Lesson, 1839 (current name source)
Agacinosia Báguena Corella, 1948 accepted as Agacinosia Collado & Alonso-Zarazaga, 1996 (current name source)
Agama diemenensis Cloquet, 1816 accepted as Rankinia diemensis Gray, 1841 (current name source)
Agama lichtensteini Gray, 1845 accepted as Pseudotrapelus sinaitus Heyden, 1827 (current name source)
Agama straminea Lichtenstein, 1945 accepted as Pseudotrapelus sinaitus Heyden, 1827 (current name source)
Agelacystis Haeckel, 1896 † accepted as Agelacrinites Vanuxem, 1842 † (current name source)
Agetus Krøyer, 1849 (current name source)
Aglaophenopsis Fewkes, 1881 (current name source)
Aglaura Savigny in Lamarck, 1818 (current name source)
Agrilus Dahl, 1823 accepted as Agrilus Curtis, 1825 (current name source)
Agriocnemis Selys in Pollen & Van Dam, 1869 accepted as Agriocnemis Selys, 1877 (current name source)
Agyneia latifolia Moon accepted as Aporosa latifolia Moon ex Thwaites (current name source)
Agyneia multilocularis Moon accepted as Aporosa lanceolata (Tul.) Thwaites (current name source)
Agyneia pubera Wall. accepted as Glochidion multiloculare (Rottler ex Willd.) Voigt (current name source)
Agyneia tetrandra Wall. accepted as Trigonostemon semperflorens (Roxb.) Müll. Arg. (current name source)
Ainuathous Babai & Ôhira, 1956 accepted as Medakathous Kishii, 1964 (current name source)