Phylum Basidiomycota R.T.Moore (1980) - basidiomycetes
   Subphylum Agaricomycotina Doweld (2001)
     Class Tremellomycetes Doweld (2001)
       Order Tremellales Fr. (1821)
         Genus Sirobasidium Lagerh. & Pat. (1892), incertae sedis