Phylum Ascomycota Caval.-Sm. (1998) - sac fungi Subphylum Pezizomycotina O.E. Erikss. & Winka (1997) Class Leotiomycetes O.E. Erikss. & Winka (1997) Order Erysiphales Warm. (1884) [monotypic] Family Erysiphaceae Sred. (1873), nom. cons. Genus Microidium (To-anun & S. Takam.) To-anun & S. Takam. (2011)