Phylum Ascomycota Caval.-Sm. (1998) - sac fungi
   Subphylum Pezizomycotina O.E. Erikss. & Winka (1997)
     01 Class Arthoniomycetes O.E. Erikss. & Winka (1997)
     02 Class Coniocybomycetes M. Prieto & Wedin (2013) [monotypic]
     03 Class Dothideomycetes O.E. Erikss. & Winka (1997)
     04 Class Eurotiomycetes O.E. Erikss. & Winka (1997)
     05 Class Geoglossomycetes Zheng Wang, C.L. Schoch & Spatafora (2009) [monotypic]
     06 Class Laboulbeniomycetes Engl. (1897)
     07 Class Lecanoromycetes O.E. Erikss. & Winka (1997)
     08 Class Leotiomycetes O.E. Erikss. & Winka (1997)
     09 Class Lichinomycetes Reeb, Lutzoni & Cl.Roux (2004) [monotypic]
     10 Class Orbiliomycetes O.E. Erikss. & Baral (2003) [monotypic]
     11 Class Pezizomycetes O.E. Erikss. & Winka (1997) [monotypic]
     12 Class Sordariomycetes O.E. Erikss. & Winka (1997)
     13 Class Xylonomycetes Gazis & P. Chaverri (2012) [monotypic]
     14 Order Thelocarpales Lücking & Lumbsch (2016), incertae sedis [monotypic]
     15 Order Vezdaeales Lumbsch & Lücking (2016), incertae sedis [monotypic]
     16 Family Harpidiaceae Vezda ex Hafellner (1984), incertae sedis
     17 Genus Biatoridium J. Lahm ex Körb. (1860), incertae sedis
     18 Genus Cyanoporina Groenh. (1951), incertae sedis
     19 Genus Eopyrenula R.C. Harris (1973), incertae sedis
     20 Genus Frigidopyrenia Grube (2005), incertae sedis
     21 Genus Melanophloea P. James & Vězda (1971), incertae sedis
     22 Genus Milospium D.Hawksw. (1975), incertae sedis
     23 Genus Oevstedalia Ertz & Diederich (2004), incertae sedis
     24 Genus Psammina Sacc. & M. Rousseau ex E. Bommer & M. Rousseau (1891), incertae sedis
     25 Genus Pyrenocollema Reinke (1895), incertae sedis
     26 Genus Trizodia Laukka (2009), incertae sedis
     27 Genus Wadeana Coppins & P. James (1978), incertae sedis