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
               Subclass Exobasidiomycetidae Jülich (1981) see Class Exobasidiomycetes Begerow, M. Stoll & R. Bauer (2007)