Phylum Ascomycota Caval.-Sm. (1998) - sac fungi
   Subphylum Pezizomycotina O.E. Erikss. & Winka (1997)
     Class Pezizomycetes O.E. Erikss. & Winka (1997)
       Order Pezizales J.Schröt. (1894)
         Family Karstenellaceae Harmaja (1974)
           1 Genus Karstenella Harmaja (1969)