asexual fungi R.T.Moore (1980) - fungi
   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.
               Anamorph genus Saxophila Selbmann & de Hoog (2015), nom. inval.