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) Genus Holtermannia Sacc. & Traverso (1910)