asexual fungi R.T.Moore (1980) - fungi
   Phylum Basidiomycota R.T.Moore (1980) - basidiomycetes
     Subphylum Ustilaginomycotina Doweld (2001)
       Class Ustilaginomycetes Warm. (1884) - smut fungi
         1 Order Urocystidales R. Bauer & Oberw. (1997)
         2 Order Ustilaginales G.Winter (1880)
         3 Order Urocystidiales orth. inval., incertae sedis see Order Urocystidales R. Bauer & Oberw. (1997)