Phylum Basidiomycota R.T.Moore (1980) - basidiomycetes
   Subphylum Ustilaginomycotina Doweld (2001)
     Class Ustilaginomycetes Warm. (1884) - smut fungi
       Order Urocystidales R. Bauer & Oberw. (1997)
         1 Family Doassansiopsidaceae Begerow, R. Bauer & Oberw. (1998)
         2 Family Fereydouniaceae S. Nasr, Soudi, H.D.T. Nguyen, M. Lutz & Piątek (2014)
         3 Family Floromycetaceae M. Lutz, R. Bauer & Vánky (2008)
         4 Family Glomosporiaceae Cif. (1963)
         5 Family Mycosyringaceae R. Bauer & Oberw. (1997)
         6 Family Urocystidaceae Begerow, R. Bauer & Oberw. (1998)