Phylum Ascomycota Caval.-Sm. (1998) - sac fungi
   Subphylum Pezizomycotina O.E. Erikss. & Winka (1997)
     Class Lecanoromycetes O.E. Erikss. & Winka (1997)
       01 Subclass Acarosporomycetidae V. Reeb, Lutzoni & Cl.Roux (2004) [monotypic]
       02 Subclass Candelariomycetidae Miądl. et al. ex Timdal & M. Westb. (2017) [monotypic]
       03 Subclass Lecanoromycetidae P.M.Kirk, P.F. Cannon, J.C. David & Stalpers ex Miądl., Lutzoni & Lumbsch (2007)
       04 Subclass Ostropomycetidae V. Reeb, Lutzoni & Cl.Roux (2004)
       05 Subclass Umbilicariomycetidae Bendiksby, Hestmark & Timdal (2013) [monotypic]
       06 Family Arthrorhaphidaceae Poelt & Hafellner (1976), incertae sedis [monotypic]
       07 Family Micropeltidaceae Clem. & Shear (1931), incertae sedis
       08 Genus Ascographa Velen. (1934), incertae sedis
       09 Genus Argopsis Th.Fr. (1857), incertae sedis
       10 Genus Bartlettiella D.J. Galloway & P.M. Jørg. (1990), incertae sedis
       11 Genus Bouvetiella Øvstedal (1986), incertae sedis
       12 Genus Buelliastrum Zahlbr. (1930), incertae sedis
       13 Genus Corticiruptor Wedin & Hafellner (1998), incertae sedis
       14 Genus Haploloma Trevis. (1857), incertae sedis
       15 Genus Hosseusia Gyeln. (1940), incertae sedis
       16 Genus Korfiomyces Iturr. & D.Hawksw. (2004), incertae sedis
       17 Genus Maronella M. Steiner (1959), incertae sedis
       18 Genus Nimisiostella Calat., Barreno & O.E. Erikss. (1997), incertae sedis
       19 Genus Notolecidea Hertel (1984), incertae sedis
       20 Genus Petractis Fr. (1845), incertae sedis
       21 Genus Piccolia A.Massal. (1856), incertae sedis
       22 Genus Ravenelula Speg. (1881), incertae sedis
       23 Genus Umbilithecium Etayo (2008), incertae sedis
       24 Genus Robincola Velen. (1947), incertae sedis
       25 Genus Roburnia Velen. (1947), incertae sedis