Phylum Basidiomycota R.T.Moore (1980) - basidiomycetes
   Subphylum Agaricomycotina Doweld (2001)
     Class Tremellomycetes Doweld (2001)
       1 Order Cystofilobasidiales Fell, Roeijmans & Boekhout (1999)
       2 Order Filobasidiales Jülich (1982)
       3 Order Holtermanniales Libkind, Wuczk., Turchetti & Boekhout (2011)
       4 Order Tremellales Fr. (1821)
       5 Order Trichosporonales Boekhout & Fell (2001)
       6 Genus Heteromycophaga P. Roberts (1997), incertae sedis
       7 Genus Phyllopta (Fr.) Fr. (1825), nom. dub., incertae sedis
       8 Genus Trichosporonoides Haskins & J.F.T. Spencer (1967), incertae sedis