Phylum Ascomycota Caval.-Sm. (1998) - sac fungi Subphylum Pezizomycotina O.E. Erikss. & Winka (1997) Class Eurotiomycetes O.E. Erikss. & Winka (1997) Subclass Eurotiomycetidae Doweld (2001) Order Ascosphaerales Gäum. ex Skou (1982) see Order Onygenales Cif. ex Benny & Kimbr. (1980) Family Ascosphaeraceae L.S. Olive & Spiltoir (1955) Genus Arrhenosphaera Stejskal (1974)