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 Onygenales Cif. ex Benny & Kimbr. (1980)
           1 Family Ajellomycetaceae Unter., J.A. Scott & Sigler (2004)
           2 Family Arthrodermataceae Locq. ex Currah (1985)
           3 Family Gymnoascaceae Baran. (1872)
           4 Family Onygenaceae Berk. (1857)