Phylum Ascomycota Caval.-Sm. (1998) - sac fungi
   Subphylum Pezizomycotina O.E. Erikss. & Winka (1997)
     Class Leotiomycetes O.E. Erikss. & Winka (1997)
       Order Erysiphales Warm. (1884) [monotypic]
         1 Family Erysiphaceae Sred. (1873), nom. cons.