organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain Eukaryota Chatton, 1925 - eukaryotes
     Kingdom Fungi R.T.Moore (1980) - fungi
       Phylum Basidiomycota R.T.Moore (1980) - basidiomycetes
         Class Ustilaginomycetes Warm. (1884) - smut fungi
           Subclass Exobasidiomycetidae Jülich (1981) see Class Exobasidiomycetes Begerow, M. Stoll & R. Bauer (2007)
             Order Georgefischeriales R. Bauer, Begerow & Oberw. (1997)
               1 Family Eballistraceae R. Bauer, Begerow, A. Nagler & Oberw. (2001)
               2 Family Georgefischeriaceae R. Bauer, Begerow & Oberw. (1997)
               3 Family Tilletiariaceae R.T.Moore (1980)