Phylum Ascomycota Caval.-Sm. (1998) - sac fungi Subphylum Pezizomycotina O.E. Erikss. & Winka (1997) Class Dothideomycetes O.E. Erikss. & Winka (1997) Subclass Pleosporomycetidae C.L. Schoch, Spatafora, Crous & Shoemaker (2007) Order Hysteriales Lindau (1896) [monotypic] Family Hysteriaceae Chevall. (1826) Genus Oedohysterium E. Boehm & C.L. Schoch (2009)