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]
         Family Pyxidiophoraceae Arnold (1971)
           1 Genus Gliocephalis Matr. (1899)
           2 Genus Mycorhynchidium Malloch & Cain (1971)
           3 Genus Pleurocatena G. Arnaud ex Aramb., Gamundí, W. Gams & G.R.W. Arnold (2007)
           4 Genus Pyxidiophora Bref. & Tavel (1891)