organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain Eukaryota Chatton, 1925 - eukaryotes
     Kingdom Fungi R.T.Moore (1980) - fungi
       Phylum Ascomycota Caval.-Sm. (1998) - sac fungi
         Class Ascomycetes G.Winter (1880) see Phylum Ascomycota Caval.-Sm. (1998)
           01 Subclass Arthoniomycetidae see Class Arthoniomycetes O.E. Erikss. & Winka (1997)
           02 Subclass Chaetothyriomycetidae Doweld (2001)
           03 Subclass Dothideomycetidae P.M.Kirk et al., 2001, nom. inval. see Subclass Dothideomycetidae P.M.Kirk, P.F. Cannon, J.C. David & Stalpers ex C.L. Schoch, Spatafora, Crous & Shoemaker (2007)
           04 Subclass Erysiphomycetidae see Class Leotiomycetes O.E. Erikss. & Winka (1997)
           05 Subclass Eurotiomycetidae Doweld (2001)
           06 Subclass Laboulbeniomycetidae see Class Laboulbeniomycetes Engl. (1897)
           07 Subclass Lecanoromycetidae P.M.Kirk, P.F. Cannon, J.C. David & Stalpers (2001), nom. inval. see Subclass Lecanoromycetidae P.M.Kirk, P.F. Cannon, J.C. David & Stalpers ex Miądl., Lutzoni & Lumbsch (2007)
           08 Subclass Leotiomycetidae see Class Leotiomycetes O.E. Erikss. & Winka (1997)
           09 Subclass Meliolomycetidae P.M.Kirk & K.D.Hyde see Subclass Sordariomycetidae O.E. Erikss. & Winka (1997)
           10 Subclass Pezizomycetidae see Class Pezizomycetes O.E. Erikss. & Winka (1997)
           11 Subclass Sordariomycetidae O.E. Erikss. & Winka (1997)
           12 Subclass Spathulosporomycetidae
           13 ?Order Mycocaliciales Tibell & Wedin (2000)
           14 ?Order Ostropales Nannf. (1932)
           15 ?Order Triblidiales O.E. Erikss. (1992)
           16 ?Order Trichotheliales Hafellner & Kalb (1995) see Order Ostropales Nannf. (1932)
           17 ?Order Verrucariales Mattick ex D.Hawksw. & O.E. Erikss. (1986)
           18 ?Family Acrospermaceae Fuckel (1870)
           19 ?Family Aspidotheliaceae Räsänen ex J.C. David & D.Hawksw. (1991) see Family Thelenellaceae O.E. Erikss. ex H. Mayrhofer (1987)
           20 ?Family Coccotremataceae Henssen ex J.C. David & D.Hawksw. (1991)
           21 ?Family Diporothecaceae R.K. Mibey & D.Hawksw. (1995)
           22 ?Family Eoterfeziaceae G.F.Atk. (1902)
           23 ?Family Epigloeaceae Zahlbr. (1903)
           24 ?Family Gomphillaceae W. Watson ex Hafellner (1984)
           25 ?Family Icmadophilaceae Triebel (1993)
           26 ?Family Koralionastetaceae Kohlm. & Volkm.-Kohlm. (1987)
           27 ?Family Lautosporaceae Kohlm., Volkm.-Kohlm. & O.E. Erikss. (1995)
           28 ?Family Mastodiaceae Zahlbr. (1907) see Family Verrucariaceae Zenker (1827)
           29 ?Family Meliolinaceae S.Hughes (1993)
           30 ?Family Microcaliciaceae Tibell (1984)
           31 ?Family Myxotrichaceae Currah (1985)
           32 ?Family Orbiliaceae Nannf. (1932)
           33 ?Family Phaneromycetaceae Gamundí & Spinedi (1986)
           34 ?Family Protothelenellaceae Vězda, H. Mayrhofer & Poelt (1985)
           35 ?Family Pseudeurotiaceae Malloch & Cain (1970)
           36 ?Family Pyrenothricaceae Zahlbr. (1926)
           37 ?Family Roesleriaceae Yao & Spooner (1999)
           38 ?Family Seuratiaceae Vuill. ex M.E.Barr (1987)
           39 ?Family Thelenellaceae O.E. Erikss. ex H. Mayrhofer (1987)
           40 ?Family Thrombiaceae Poelt & Vězda ex J.C. David & D.Hawksw. (1991)