Phylum Basidiomycota R.T.Moore (1980) - basidiomycetes Subphylum Agaricomycotina Doweld (2001) Class Agaricomycetes Doweld (2001) Order Agaricales Underw. (1899) Family Cystostereaceae Jülich (1982) Genus Rigidotubus J. Song, Y.C. Dai & B.K. Cui (2018)