Phylum Basidiomycota R.T.Moore (1980) - basidiomycetes Subphylum Agaricomycotina Doweld (2001) Class Agaricomycetes Doweld (2001) Order Russulales Kreisel ex P.M.Kirk, P.F. Cannon & J.C. David (2001) Genus Perplexostereum Ryvarden & Tutka (2014), incertae sedis