Aaosphaeria arxii (Aa) Aptroot, 1995 (basis of record)
Abacina alboatra (Hoffm.) Norman accepted as Diplotomma alboatrum (Hoffm.) Flot., 1849 (basis of record)
Abacina amphibia (Fr.) Norman, 1853 accepted as Rhizocarpon amphibium (Fr.) Th. Fr., 1874 (basis of record)
Abaphospora borealis (P. Karst.) Kirschst., 1939 accepted as Melanopsamma borealis (P. Karst.) Sacc., 1878 (basis of record)
Abortiporus biennis (Bull.) Singer, 1944 (basis of record)
Abortiporus borealis (Fr.) Singer, 1944 accepted as Climacocystis borealis (Fr.) Kotl. & Pouzar, 1958 (basis of record)
Abortiporus distortus (Schwein.) Murrill, 1904 accepted as Abortiporus biennis (Bull.) Singer, 1944 (basis of record)
Abortiporus fimbriatus (Fr.) O. Fidalgo & M. Fidalgo, 1957 accepted as Hydnopolyporus fimbriatus (Fr.) D.A. Reid, 1962 (basis of record)
Abortiporus fractipes (Berk. & M.A. Curtis) Gilb. & Ryvarden, 1986 (basis of record)
Abortiporus humilis (Peck) Singer, 1944 accepted as Abortiporus fractipes (Berk. & M.A. Curtis) Gilb. & Ryvarden, 1986 (basis of record)
Abortiporus roseus (D.A. Reid) Masuka & Ryvarden, 1992 (basis of record)
Abortiporus subabortivus Murrill, 1938 accepted as Diacanthodes novoguineensis (Henn.) O. Fidalgo, 1962 (basis of record)
Abortiporus tropicalis Murrill, 1910 accepted as Abortiporus fractipes (Berk. & M.A. Curtis) Gilb. & Ryvarden, 1986 (basis of record)
Abortiporus wynnei (Berk. & Broome) Rauschert, 1988 accepted as Tyromyces wynnei (Berk. & Broome) Donk, 1933 (basis of record)
Abortiporus zonatus (Corner) T. Hatt., 1999 accepted as Heteroporus zonatus Corner, 1987 (basis of record)
Abropelta fusarioides B. Sutton, 1986 (basis of record)
Abrothallus bertianus Massee, 1849 (basis of record)
Abrothallus caerulescens Kotte (basis of record)
Abrothallus cetrariae Kotte (basis of record)
Abrothallus cladonema (Wedd.) Zopf accepted as Clypeococcum cladonema (Wedd.) D. Hawksw., 1977 (basis of record)
Abrothallus cladoniae (Ellis & Everh.) Clauzade, Diederich & Cl. Roux, 1989 (basis of record)
Abrothallus glabratulae Kotte accepted as Abrothallus bertianus Massee, 1849 (basis of record)
Abrothallus inquinans Tul., 1852 accepted as Micarea inquinans (Tul.) Coppins, 1992 (basis of record)
Abrothallus lobariellus (Nyl.) Zopf, 1896 accepted as Dactylospora lobariella (Nyl.) Hafellner, 1979 (basis of record)
Abrothallus microspermus Tul., 1852 (basis of record)
Abrothallus moorei Linds. accepted as Phaeopyxis punctum (A. Massal.) Rambold, Triebel & Coppins, 1990 (basis of record)
Abrothallus oxysporus Tul., 1852 accepted as Nesolechia oxyspora (Tul.) A. Massal., 1856 (basis of record)
Abrothallus parmeliarum (Sommerf.) Nyl., 1869 (basis of record)
Abrothallus parmotrematis Diederich, 1989 (basis of record)
Abrothallus prodiens (Harm.) Clauzade, Diederich & Cl. Roux, 1989 (basis of record)
Abrothallus pulverulentus Anzi accepted as Buellia pulverulenta (Anzi) Jatta, 1900 (basis of record)
Abrothallus suecicus (Kirschst.) Nordin, 1964 (basis of record)
Abrothallus usneae Stein, 1861 (basis of record)
Abrothallus welwitschii Mont. (basis of record)
Absconditella annexa (Arnold) Vezda, 1965 (basis of record)
Absconditella celata Döbbeler & Poelt, 1977 (basis of record)
Absconditella delutula (Nyl.) Coppins & H. Kilias, 1980 (basis of record)
Absconditella lignicola Vezda & Pišút, 1985 (basis of record)
Absconditella modesta (Stizenb.) Vezda, 1966 accepted as Absconditella delutula (Nyl.) Coppins & H. Kilias, 1980 (basis of record)
Absconditella pauxilla Vezda & Vivant, 1975 (basis of record)
Absconditella sphagnorum Vezda & Poelt, 1965 (basis of record)
Absconditella trivialis (Willey ex Tuck.) Vezda, 1965 (basis of record)
Abundisporus fuscopurpureus (Pers.) Ryvarden, 1999 accepted as Loweporus fuscopurpureus (Pers.) Ryvarden, 1980 (basis of record)
Abundisporus roseoalbus (Jungh.) Ryvarden, 1999 accepted as Loweporus roseoalbus (Jungh.) Ryvarden, 1980 (basis of record)
Abundisporus subflexibilis (Berk. & M.A. Curtis) Parmasto, 2000 accepted as Loweporus roseoalbus (Jungh.) Ryvarden, 1980 (basis of record)
Abundisporus violaceus (Wakef.) Ryvarden, 1999 accepted as Nigroporus violaceus (Wakef.) Ryvarden, 1972 (basis of record)
Abyssomyces hydrozoicus Kohlm., 1970 (basis of record)
Acallomyces gyrophaenae (Thaxt.) I.I. Tav., 1973 (basis of record)
Acallomyces homalotae Thaxt., 1902 (basis of record)
Acallomyces platyolae Thaxt., 1931 (basis of record)
Acantharia aterrima (Cooke & G. Winter) Arx, 1954 (basis of record)
Acantharia chaetomoides W.H. Hsieh, Chi Y. Chen & Sivan., 1995 (basis of record)
Acantharia echinata (Ellis & Everh.) Theiss. & Syd., 1918 (basis of record)
Acantharia elegans (Syd. & P. Syd.) Arx, 1954 (basis of record)
Acantharia hamata (Penz. & Sacc.) Arx, 1954 (basis of record)
Acantharia quercus-dilatatae S.K. Bose & E. Müll., 1965 (basis of record)
Acantharia sinensis (Petr.) Arx, 1954 (basis of record)
Acanthellorhiza globulifera P. Roberts, 1999 accepted as Heteroacanthella acanthophysa (Burds.) Oberw., 1990 (basis of record)
Acanthobasidium delicatum (Wakef.) Oberw., 1965 accepted as Aleurodiscus delicatus Wakef., 1952 (basis of record)
Acanthobasidium delicatum (Wakef.) Oberw. ex Jülich, 1979 accepted as Aleurodiscus delicatus Wakef., 1952 (basis of record)
Acanthobasidium norvegicum (J. Erikss. & Ryvarden) Boidin, Lanq., Cand., Gilles & Hugueney, 1986 (basis of record)
Acanthobasidium phragmitis Boidin, Lanq., Gilles, Cand. & Hugueney, 1986 (basis of record)
Acanthocystis applicatus (Batsch) Kühner, 1926 accepted as Resupinatus applicatus (Batsch) Gray, 1821 (basis of record)
Acanthocystis cyphelliformis (Berk. & Broome) Konrad & Maubl., 1937 accepted as Hohenbuehelia cyphelliformis (Berk. & Broome) O.K. Mill., 1986 (basis of record)
Acanthocystis geogenius (DC.) Kühner, 1926 accepted as Hohenbuehelia petaloides (Bull.) Schulzer, 1866 (basis of record)
Acanthocystis hepatotricha (Berk.) Singer, 1943 accepted as Lentinellus pulvinulus (Berk.) Pegler, 1965 (basis of record)
Acanthocystis longipes (Boud.) J. Favre, 1948 accepted as Hohenbuehelia longipes (Boud.) M.M. Moser, 1967 (basis of record)
Acanthocystis petaloides (Bull.) Kühner, 1926 accepted as Hohenbuehelia petaloides (Bull.) Schulzer, 1866 (basis of record)
Acanthocystis serotinus (Schrad.) Konrad & Maubl., 1937 accepted as Panellus serotinus (Schrad.) Kühner, 1950 (basis of record)
Acanthocystis stratosa (G.F. Atk.) Singer, 1943 accepted as Hohenbuehelia angustata (Berk.) Singer, 1951 (basis of record)
Acanthocystis striatula (Pers.) Kühner, 1926 accepted as Resupinatus striatulus (Pers.) Murrill, 1915 (basis of record)
Acanthocystis testudo (Berk.) Boedijn, 1940 accepted as Hohenbuehelia testudo (Berk.) Pegler, 1986 (basis of record)
Acanthocystis viscidula (Berk. & Broome) Singer, 1943 accepted as Pleurotus viscidulus (Berk. & Broome) Pegler, 1965 (basis of record)
Acanthoderma memecyli Syd. & P. Syd., 1917 (basis of record)
Acanthodochium collodisculae Samuels, J.D. Rogers & Nagas., 1987 (basis of record)
Acanthofungus ahmadii (Boidin) Sheng H. Wu, Boidin & C.Y. Chien, 2000 (basis of record)
Acanthofungus rimosus Sheng H. Wu, Boidin & C.Y. Chien, 2000 (basis of record)
Acanthofungus thoenii (Boidin, Lanq. & Gilles) Sheng H. Wu, Boidin & C.Y. Chien, 2000 (basis of record)
Acantholichen pannarioides P.M. Jørg., 1998 (basis of record)
Acanthomyces lasiophora Thaxt., 1892 accepted as Rhachomyces lasiophorus (Thaxt.) Thaxt., 1971 (basis of record)
Acanthonitschkea tristis (Pers.) Nannf., 1975 (basis of record)
Acanthophiobolus chaetophorus (P. Crouan & H. Crouan) Svrček, 1974 accepted as Acanthophiobolus helicosporus (Berk. & Broome) J. Walker, 1972 (basis of record)
Acanthophiobolus gracilis (Niessl) Arx & E. Müll., 1975 accepted as Acanthophiobolus helicosporus (Berk. & Broome) J. Walker, 1972 (basis of record)
Acanthophiobolus helicosporus (Berk. & Broome) J. Walker, 1972 (basis of record)
Acanthophiobolus helminthosporus (Rehm) Berl., 1893 accepted as Acanthophiobolus helicosporus (Berk. & Broome) J. Walker, 1972 (basis of record)
Acanthophysellum bisporum (Boidin & Lanq.) Boidin & Gilles, 2002 accepted as Acanthophysium bisporum Boidin & Lanq., 1986 (basis of record)
Acanthophysellum buxicola (Boidin & Lanq.) Boidin & Gilles, 2002 accepted as Acanthophysium buxicola Boidin & Lanq., 1986 (basis of record)
Acanthophysellum canadense (Skolko) Sheng H. Wu, Boidin & C.Y. Chien, 2000 accepted as Aleurodiscus canadensis Skolko, 1944 (basis of record)
Acanthophysellum cerussatum (Bres.) Parmasto, 1967 accepted as Aleurodiscus cerussatus (Bres.) Höhn. & Litsch., 1907 (basis of record)
Acanthophysellum dextrinoideocerussatum (Manjón, M.N. Blanco & G. Moreno) Sheng H. Wu, Boidin & C.Y. Chien, 2000 accepted as Aleurodiscus dextrinoideocerussatus Manjón, M.N. Blanco & G. Moreno, 1990 (basis of record)
Acanthophysellum lapponicum (Litsch.) Sheng H. Wu, Boidin & C.Y. Chien, 2000 accepted as Aleurodiscus lapponicus Litsch., 1944 (basis of record)
Acanthophysellum lividocoeruleum (P. Karst.) Parmasto, 1967 accepted as Aleurodiscus lividocaeruleus (P. Karst.) P.A. Lemke, 1964 (basis of record)
Acanthophysellum mesaverdense (Lindsey) Sheng H. Wu, Boidin & C.Y. Chien, 2000 accepted as Aleurodiscus mesaverdensis Lindsey, 1987 (basis of record)
Acanthophysium aberrans (G. Cunn.) G. Cunn., 1963 accepted as Aleurodiscus aberrans G. Cunn., 1956 (basis of record)
Acanthophysium abietis (H.S. Jacks. & P.A. Lemke) Ginns & M.N.L. Lefebvre, 1993 accepted as Aleurodiscus abietis H.S. Jacks. & P.A. Lemke, 1964 (basis of record)
Acanthophysium acerinum (Pers.) G. Cunn., 1963 accepted as Dendrothele acerina (Pers.) P.A. Lemke, 1965 (basis of record)
Acanthophysium ahmadii (Boidin) Boidin, 1986 accepted as Acanthofungus ahmadii (Boidin) Sheng H. Wu, Boidin & C.Y. Chien, 2000 (basis of record)
Acanthophysium apricans (Bourdot) G. Cunn., 1963 accepted as Aleurodiscus apricans Bourdot, 1910 (basis of record)
Acanthophysium aurantium (Pers.) G. Cunn., 1963 accepted as Aleurodiscus aurantius (Pers.) J. Schröt., 1888 (basis of record)
Acanthophysium australiense (Wakef.) G. Cunn., 1963 accepted as Aleurodiscus australiensis Wakef., 1918 (basis of record)