organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain Eukaryota Chatton, 1925 - eukaryotes
     Kingdom Fungi R.T.Moore (1980) - fungi
       Phylum Ascomycota Caval.-Sm. (1998) - sac fungi
         Class Ascomycetes G.Winter (1880) see Phylum Ascomycota Caval.-Sm. (1998)
           Subclass Leotiomycetidae see Class Leotiomycetes O.E. Erikss. & Winka (1997)
             Order Helotiales Nannf. (1932)
               Family Rutstroemiaceae Holst-Jensen, L.M. Kohn & T. Schumach. (1997)