Phylum Ascomycota Caval.-Sm. (1998) - sac fungi
   Subphylum Pezizomycotina O.E. Erikss. & Winka (1997)
     Class Sordariomycetes O.E. Erikss. & Winka (1997)
       Subclass Hypocreomycetidae O.E. Erikss. & Winka (1997)
         Order Hypocreales Lindau (1897)
           Family Clavicipitaceae Earle ex Rogerson (1970)
             Genus Berkellella O.E. Erikss. (1999), orth. inval. see Genus Berkelella (Sacc.) Sacc. (1891)