Domain Eucaryota
   Subdomain Amoebota Doweld (2001)
     Kingdom Mucorobiota Doweld (2001)
       Subkingdom Tuberobiotina Doweld (2001)
         Phylum Ustilaginomycota R.T.Moore (1980)
           Subphylum Ustilaginomycotina Doweld (2001) [monotypic]
             Class Ustilaginomycetes Warm. (1884) - smut fungi
               1 Subclass Entorrhizomycetidae R. Bauer & Oberw. (1997) see Class Entorrhizomycetes Begerow, M. Stoll & R. Bauer (2007)
               2 Subclass Ustilaginomycetidae Jülich (1981) see Class Ustilaginomycetes Warm. (1884)
               3 Subclass Exobasidiomycetidae Jülich (1981) see Class Exobasidiomycetes Begerow, M. Stoll & R. Bauer (2007)