Phylum Ascomycota Caval.-Sm. (1998) - sac fungi
   Subphylum Pezizomycotina O.E. Erikss. & Winka (1997)
     Class Lecanoromycetes O.E. Erikss. & Winka (1997)
       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)
         Order Teloschistales D.Hawksw. & O.E. Erikss. (1986)
           1 Family Letrouitiaceae Bellem. & Hafellner (1982)
           2 Family Megalosporaceae Vezda ex Hafellner & Bellem. (1982)
           3 Family Teloschistaceae Zahlbr. (1898)