Phylum Basidiomycota R.T.Moore (1980) - basidiomycetes Subphylum Ustilaginomycotina Doweld (2001) Class Ustilaginomycetes Warm. (1884) - smut fungi Order Urocystidales R. Bauer & Oberw. (1997) Family Urocystidaceae Begerow, R. Bauer & Oberw. (1998) Genus Melanoxa M. Lutz, Vánky & R. Bauer (2013)