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 Loculoascomycetes Ainsw. (1966) see Class Ascomycetes G.Winter (1880)
               Subclass Loculoplectascomycetidae see Subclass Dothideomycetidae P.M.Kirk et al., 2001, nom. inval.
                 Order Myriangiales Starbäck (1899)
                   Family Arthoniaceae Rchb. (1841)
                     1 Genus Arthonia Ach. (1806), nom. cons.
                     2 Genus Arthothelium A.Massal. (1852)
                     3 Genus Cryptothecia Stirt. (1876), nom. cons.
                     4 Genus Stirtonia A.L.Sm. (1926), nom. cons.