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 Basidiomycetes G.Winter (1880)
           Subclass Tremellomycetidae Caval.-Sm. (1998) see Class Tremellomycetes Doweld (2001)
             Order Cystofilobasidiales Fell, Roeijmans & Boekhout (1999)
               Family Cystofilobasidiaceae K. Wells & Bandoni (2001)
                 1 Genus Cystofilobasidium Oberw. & Bandoni (1983)
                 2 Genus Mrakia Y. Yamada & Komag. (1987)
                 3 Genus Xanthophyllomyces Golubev (1995) see Genus Phaffia M.W. Mill., Yoney. & Soneda (1976)