asexual fungi R.T.Moore (1980) - fungi
   Phylum Ascomycota Caval.-Sm. (1998) - sac fungi
     Subphylum Pezizomycotina O.E. Erikss. & Winka (1997)
       Class Sordariomycetes O.E. Erikss. & Winka (1997)
         Subclass Sordariomycetidae O.E. Erikss. & Winka (1997)
           Order Chaetosphaeriales Huhndorf, A.N. Mill. & F.A. Fernández (2004)
             Family Helminthosphaeriaceae Samuels, Cand. & Magni (1997)
               Genus Ruzenia O. Hilber (2002)