Phylum Ascomycota Caval.-Sm. (1998) - sac fungi
Subphylum Pezizomycotina O.E. Erikss. & Winka (1997)
Class Eurotiomycetes O.E. Erikss. & Winka (1997)
Subclass Eurotiomycetidae Tehler ex Geiser & Lutzoni (2007), nom. inval.
Order Onygenales Cif. ex Benny & Kimbr. (1980)
01 Family Ajellomycetaceae Unter., J.A. Scott & Sigler (2004)
02 Family Arthrodermataceae Locq. ex Currah (1985)
03 Family Ascosphaeraceae L.S. Olive & Spiltoir (1955)
04 Family Gymnoascaceae Baran. (1872)
05 Family Nannizziopsidaceae Guarro, Stchigel, D.A. Sutton & Cano (2013) [monotypic]
06 Family Onygenaceae Berk. (1857)
07 Family Spiromastigaceae Hirooka, Tanney & Seifert (2016)
08 Genus Arthropsis Sigler, M.T. Dunn & J.W. Carmich. (1982), incertae sedis
09 Genus Lacazia Taborda, V.A. Taborda & McGinnis (1999), incertae sedis
10 Genus Sphaerosporium Schwein. (1832), incertae sedis