living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukaryotae see Domain Eukaryota Chatton, 1925
     Kingdom Plantae Haeckel (1866) - plants
       Subkingdom Thallobionta
         Division Eumycota see Kingdom Eumycota
           Subdivision Ascomycotina Ainsw. (1966) see Phylum Ascomycota Caval.-Sm. (1998)
             Class Plectomycetes Ainsw. (1966) see Class Ascomycetes G.Winter (1880)
               Order Gymnascales see Order Onygenales Cif. ex Benny & Kimbr. (1980)
                 Family Onygenaceae Berk. (1857)
                   1 Genus Arachnomyces Massee & E.S. Salmon (1902)
                   2 Genus Onygena Pers. (1800), nom. sanct.
                   3 Genus Thermoascus Miehe (1907)