Phylum Ascomycota Caval.-Sm. (1998) - sac fungi
   Subphylum Pezizomycotina O.E. Erikss. & Winka (1997)
     Class Laboulbeniomycetes Engl. (1897)
       Order Pyxidiophorales P.F. Cannon (2001) [monotypic]
         1 Family Pyxidiophoraceae Arnold (1971)