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 Tilletiales Kreisel ex R. Bauer & Oberw. (1997)
               Family Tilletiaceae J.Schröt. (1887)
                 1 Genus Conidiosporomyces Vánky (1992)
                 2 Genus Entylomella Höhn. (1924)
                 3 Genus Erratomyces M. Piepenbr. & R. Bauer (1997)
                 4 Genus Ingoldiomyces Vánky (1996)
                 5 Genus Neovossia Körn. (1879)
                 6 Genus Oberwinkleria Vánky & R. Bauer (1995)
                 7 Genus Tilletia Tul. & C.Tul. (1847)
                 8 Genus Tilletiella Zambett. (1970), nom. inval.