Acanthellorhiza P. Roberts, 1999 (name verified source)
Acanthotrema A. Frisch, 2006 (name verified source)
Acaroconium Kocourková & D. Hawksworth, 2008 (name verified source)
Acaromyces Boekhout, Scorzetti, Gerson & Sztejnberg, 2003 (name verified source)
Acephala Grünig & Sieber, 2005 (name verified source)
Achaetomiella J.A. von Arx, 1970 accepted as Chaetomium Kunze, 1817 (name verified source)
Achitonium Kunze, 1819 accepted as Pactilia E.M. Fries, 1837 (name verified source)
Achlyites Meschinelli, 1902 † (name verified source)
Aciculariella Arnaud, 1954 (name verified source)
Aciculopsora A. Aptroot & M.T. Trest, 2006 (name verified source)
Acidomyces B.J. Baker, M.A. Lutz, S.C. Dawson, P.L. Bond & J.F. Banfield, 2004 accepted as Acidomyces B.J. Baker, M.A. Lutz, S.C. Dawson, P.L. Bond & J.F. Banfield ex L. Selbmann, G.S. de Hoog & F. De Leo in Selbmann et al., 2008 (name verified source)
Acremoniula G. Arnaud, 1954 (name verified source)
Acrocorelia R. Doll, 1982 (name verified source)
Acrosporium Bonorden, 1851 (name verified source)
Actidiographium Lar.N. Vassiljeva, 2000 (name verified source)
Actinomadura H. Lechevalier & M.P. Lechevalier, 1968 (Approved Lists, 1980) (name verified source)
Actinomyces Harz, 1877 (Approved Lists, 1980) (name verified source)
Actinoplanes Couch, 1950 (Approved Lists, 1980) (name verified source)
Actinopolyspora Gochnauer, K.G. Johnson & Kushner, 1975 (Approved Lists, 1980) (name verified source)
Actinopsis Starbäck, 1899 accepted as Trichothelium J. Müller Arg., 1885 (name verified source)
Actinosynnema T. Hasegawa, H. Lechevalier & M.P. Lechevalier, 1978 (Approved Lists, 1980) (name verified source)
Actinothyrella Edward, Kr.P. Singh, S.C. Tripathi, M.K. Sinha & Ranade, 1974 (name verified source)
Actinotrichum Wallroth (name verified source)
Actycus Rafinesque, 1815 (name verified source)
Adella Petrak, 1936 accepted as Wojnowicia P.A. Saccardo in P.A. Saccardo & P. Sydow, 1899 (name verified source)
Adelolecia Hertel & Hafellner, 1984 (name verified source)
Adlerocystis Feldmann-Muhsam & Havivi, 1963 (name verified source)
Aeciure Buriticá & J.F. Hennen, 1994 (name verified source)
Aegeritoidea (name verified source)
Aegeritospira (name verified source)
Aenigmatospora R.F. Castañeda Ruiz, Saikawa, Guarro & Calduch, 1999 (name verified source)
Aetnensis Lloyd, 1910 (name verified source)
Agaricites Meschinelli, 1891 † (name verified source)
Agarico-carnis Paulet, 1793 accepted as Fistulina Bulliard, 1791 (name verified source)
Agarico-igniarium Paulet, 1793 accepted as Fomes (E.M. Fries) E.M. Fries, 1849 (name verified source)
Agaricon de Tournefort ex Adanson, 1763 accepted as Fomitopsis P.A. Karsten, 1881 (name verified source)
Agarico-pulpa Paulet, 1793 accepted as Fomitopsis P.A. Karsten, 1881 (name verified source)
Agarico-suber Paulet, 1793 accepted as Daedalea Persoon, 1801 (name verified source)
Agaricum P. Micheli ex Maratti, 1822 accepted as Fomitopsis P.A. Karsten, 1881 (name verified source)
Agaricum Paulet, 1812 accepted as Fomitopsis P.A. Karsten, 1881 (name verified source)
Aglaocephalum W. Weston, 1933 accepted as Pulchromyces G.L. Hennebert, 1973 (name verified source)
Aglaopisma De Notaris ex Baglietto, 1856 accepted as Caloplaca Th. Fries, 1860 (name verified source)
Ahmadiago Vánky, 2004 (name verified source)
Ainoa H.T. Lumbsch & I. Schmitt in H.T. Lumbsch et al., 2001 (name verified source)
Albatrellopsis Teixeira, 1993 (name verified source)
Albigo Ehrhart ex Steudel, 1824 accepted as Podosphaera G. Kunze in G. Kunze & Schmidt, 1823 (name verified source)
Albocrustum Lloyd, 1925 accepted as Biscogniauxia O. Kuntze, 1891 (name verified source)
Albomyces I. Miyake, 1908 accepted as Aciculosporium I. Miyake, 1908 (name verified source)
Albonectria Rossman & Samuels, 1999 (name verified source)
Alciphila H. Harmaja, 2002 (name verified source)
Aletes (name verified source)
Aleurina Massee, 1898 (name verified source)
Aleurodiscus Rabenhorst ex J. Schröter in Cohn, 1888 (name verified source)
Aleuromyces Boidin & Gilles, 2002 (name verified source)
Aliquandostipite P. Inderbitzin in P. Inderbitzin et al., 2001 (name verified source)
Allantophomoides S.L. Wei & T.Y. Zhang, 2003 (name verified source)
Allantospora (Watsk.) Ciferri, 1932 (name verified source)
Allarthoniomyces E.A. Thomas, 1939 accepted as Arthonia E. Acharius, 1806 (name verified source)
Alleppeysporonites Ramanujam & Rao, 1979 † (name verified source)
Allochytridium Salkin, 1970 accepted as Allochytrium A.B. Doweld, 2013 (name verified source)
Alloclavaria Dentinger & D.J. McLaughlin, 2007 (name verified source)
Alnicola (Kühner) R. Heim, 1931 (name verified source)
Alocospora J.C. Krug, 1990 (name verified source)
Alpakesiopsis B.A. Abbas, B.C. Sutton, A. Ghaffar & A. Abbas, 2003 (name verified source)
Alphamyces P.M. Letcher in Letcher, Vélez, Barrantes, Powell, Churchill & Wakefield, 2008 (name verified source)
Alphitomyces Reissek, 1856 accepted as Isaria Persoon, 1794 (verified source for family)
Alternariaster E.G. Simmons, 2007 (name verified source)
Alutaceodontia (Parmasto) Hjortstam & Ryvarden, 2002 (name verified source)
Alveolinus Rafinesque, 1815 (name verified source)
Alysidiella Crous, 2006 (name verified source)
Amandinea Choisy ex C. Scheidegger & M. Mayrhofer in C. Scheidegger, 1993 (name verified source)
Amanita Adanson, 1763 (name verified source)
Amanita Dillenius ex Boehmer, 1760 accepted as Agaricus Linnaeus, 1753 (name verified source)
Amarrendia N.L. Bougher & T. Lebel, 2002 (name verified source)
Amauroascus J. Schröter, 1893 (name verified source)
Amaurodon J. Schröter in Cohn, 1888 (name verified source)
Ambispora C. Walker, M. Vestberg & A. Schüssler in Walker et al., 2007 (name verified source)
Ambrosiozyma J.P. van der Walt, 1972 (name verified source)
Ambylospora (name verified source)
Amepiospora Locquin & Salard-Cheboldaeff, 1980 † (name verified source)
Amorosia P.G. Mantle & D. Hawksworth, 2006 (name verified source)
Amphichorda E.M. Fries, 1825 accepted as Isaria Persoon, 1794 (name verified source)
Amphichorda E.M. Fries, 1825 accepted as Isaria Persoon, 1794 (verified source for family)
Amphilogia Gryzenhout, Glen & M.J. Wingfield, 2005 (name verified source)
Amphirosellinia Y.M. Ju, J.D. Rogers, H.M. Hsieh & L. Vasilyeva, 2005 (name verified source)
Amphischizonia Montagne, 1856 accepted as Cryptodictyon A. Massalongo, 1860 (name verified source)
Amphopsis (Nylander) Hue, 1892 accepted as Pyrenopsis Nylander, 1858 (name verified source)
Amphorothecium P.M. McCarthy, G. Kantvilas & J.A. Elix, 2001 (name verified source)
Ampliotrema Kalb ex Kalb, 2006 (name verified source)
Ampliotrema Kalb, 2004 accepted as Ampliotrema Kalb ex Kalb, 2006 (name verified source)
Ampullariella Couch, 1964 (Approved Lists, 1980) (name verified source)
Ampulliferinites Kalgutkar & Sigler, 1995 † (name verified source)
Ampulloclitocybe Redhead, Lutzoni, Moncalvo & Vilgalys, 2002 (name verified source)
Amylascus Trappe, 1971 (name verified source)
Amylocorticiellum Spirin & Zmitrovich, 2002 (name verified source)
Amylolepiota H. Harmaja, 2002 (name verified source)
Amyloporiella A. David & Tortič, 1984 (name verified source)
Amyloxenasma (Oberwinkler) K. Hjortstam & L. Ryvarden, 2005 accepted as Xenasmatella Oberwinkler, 1966 (name verified source)
Anamika K.A. Thomas, U. Peintner, M.M. Moser & P. Manimohan, 2002 (name verified source)
Anaptychiomyces E.A. Thomas, 1939 accepted as Anaptychia Körber, 1848 (name verified source)