Phylum Basidiomycota R.T.Moore (1980) - basidiomycetes Subphylum Agaricomycotina Doweld (2001) Class Agaricomycetes Doweld (2001) Order Agaricales Underw. (1899) Family Stephanosporaceae Oberw. & E.Horak (1979) Genus Athelidium Oberw. (1965)