Phylum Basidiomycota R.T.Moore (1980) - basidiomycetes
   Subphylum Agaricomycotina Doweld (2001)
     Class Tremellomycetes Doweld (2001)
       Order Holtermanniales Libkind, Wuczk., Turchetti & Boekhout (2011)
         Family Holtermanniaceae Redhead (2015)
           1 Genus Holtermannia Sacc. & Traverso (1910)
           2 Genus Holtermanniella Libkind, Wuczk., Turchetti & Boekhout (2011), nom. inval.