organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain Eukaryota Chatton, 1925 - eukaryotes
     Opisthokonta Cavalier-Smith 1987, nom. cl. inval. see Clade Opisthokonta Cavalier-Smith 1987 [Simpson & Medina 2020]
       Kingdom Fungi R.T.Moore (1980) - fungi
         Phylum Ascomycota Caval.-Sm. (1998) - sac fungi
           Subphylum Pezizomycotina O.E. Erikss. & Winka (1997)
             Genus Cryptoascus Petri (1909)
               Cryptoascus graminis B.L.Rob. & G.W. Ayers (1954)