Phylum Ascomycota Caval.-Sm. (1998) - sac fungi
   Subphylum Pezizomycotina O.E. Erikss. & Winka (1997)
     Class Leotiomycetes O.E. Erikss. & Winka (1997)
       Order Helotiales Nannf. (1932)
         Family Sclerotiniaceae Whetzel ex Whetzel (1945)
           Genus Pycnopeziza W.L. White & Whetzel (1938), nom. protect.