Phylum Ascomycota Caval.-Sm. (1998) - sac fungi
   Subphylum Pezizomycotina O.E. Erikss. & Winka (1997)
     Class Dothideomycetes O.E. Erikss. & Winka (1997)
       Subclass Dothideomycetidae P.M.Kirk, P.F. Cannon, J.C. David & Stalpers ex C.L. Schoch, Spatafora, Crous & Shoemaker (2007)
         Order Capnodiales Woron. (1925)
           Family Extremaceae Quaedvl. & Crous (2014), nom. inval.
             1 Genus Extremus Quaedvl. & Crous (2014), nom. inval.
             2 Genus Petrophila de Hoog & Quaedvl. (2014), nom. inval.
             3 Genus Pseudoramichloridium Cheew. & Crous (2009)
             4 Genus Saxophila Selbmann & de Hoog (2015), nom. inval.
             5 Genus Staninwardia B.Sutton (1971)
             6 Genus Vermiconia Egidi & Onofri (2014), nom. inval.