Phylum Ascomycota Caval.-Sm. (1998) - sac fungi
   Subphylum Pezizomycotina O.E. Erikss. & Winka (1997)
     Class Leotiomycetes O.E. Erikss. & Winka (1997)
       Order Helotiales Nannf. (1932)
         Family Rutstroemiaceae Holst-Jensen, L.M. Kohn & T. Schumach. (1997)
           1 Genus Bicornispora Checa, Barrasa, M.N. Blanco & A.T. Martínez (1996)
           2 Genus Dencoeliopsis Korf (1971)
           3 Genus Lambertella Höhn. (1918)
           4 Genus Lanzia Sacc. (1884)
           5 Genus Rutstroemia P.Karst. (1871), nom. cons.
           6 Genus Torrendiella Boud. & Torrend (1911)