Phylum Basidiomycota R.T.Moore (1980) - basidiomycetes Subphylum Ustilaginomycotina Doweld (2001) Class Exobasidiomycetes Begerow, M. Stoll & R. Bauer (2007) Order Microstromatales R. Bauer & Oberw. (1997) 1 Family Microstromataceae Jülich (1982) 2 Family Quambalariaceae Z.W. de Beer, Begerow & R. Bauer (2006) 3 Family Volvocisporiaceae Begerow, R. Bauer & Oberw. (2001) 4 Genus Jaminaea Sipiczki & Kajdacsi ex Kijporn. & Aime (2017), incertae sedis 5 Genus Parajaminaea Kijporn. & Aime (2017), incertae sedis 6 Genus Pseudomicrostroma Kijporn. & Aime (2017), incertae sedis 7 Genus Sympodiomycopsis Sugiy., Tokuoka & Komag. (1991), incertae sedis