Phylum Ascomycota Caval.-Sm. (1998) - sac fungi
   Subphylum Pezizomycotina O.E. Erikss. & Winka (1997)
     Class Eurotiomycetes O.E. Erikss. & Winka (1997)
       Subclass Eurotiomycetidae Doweld (2001)
         Order Eurotiales G.W. Martin ex Benny & Kimbr. (1980)
           Family Monascaceae J.Schröt. (1894)
             ?Genus Xeromyces L.R. Fraser (1954)