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 Arthoniomycetidae see Class Arthoniomycetes O.E. Erikss. & Winka (1997)
             Order Arthoniales Henssen ex D.Hawksw. & O.E. Erikss. (1986)
               01 Family Arthoniaceae Rchb. (1841)
               02 Family Chrysothricaceae see Family Chrysotrichaceae Zahlbr. (1905), nom. cons.
               03 Family Roccellaceae Chevall. (1826)
               04 Genus Arthophacopsis Hafellner (1998), incertae sedis
               05 Genus Arthothelium A.Massal. (1852), incertae sedis
               05a [Genus Arthotheliomyces Cif. & Tomas. (1953), incertae sedis] see Genus Arthothelium A.Massal. (1852)
               06 Genus Catarraphia A.Massal. (1860), incertae sedis
               06a [Genus Cyclographa Vain. (1921), incertae sedis] see Genus Catarraphia A.Massal. (1860)
               07 Genus Hormosphaeria Lév. (1863), nom. dub., incertae sedis
               08 Genus Llimonaea Egea & Torrente (1991), incertae sedis
               08a1 [Genus Mycardothelium incertae sedis] see Genus Arthothelium A.Massal. (1852)
               08a2 [Genus Mycarthothelium Vain. (1928), incertae sedis] see Genus Arthothelium A.Massal. (1852)
               09 Genus Nipholepis Syd. (1935), incertae sedis
               10 Genus Sipmania Egea & Torrente (1994), incertae sedis
               11 Genus Stirtoniopsis Groenh. (1938), nom. inval., incertae sedis
               12 Genus Synarthonia Müll.Arg. (1891), incertae sedis
               12a [Genus Synarthoniomyces Cif. & Tomas. (1953), incertae sedis] see Genus Synarthonia Müll.Arg. (1891)
               13 Genus Tania Egea, Torrente & Sipman (1995), incertae sedis
               14 Genus Tarbertia Dennis (1974), incertae sedis
               15 Genus Trichophyma Rehm (1904), incertae sedis
               16 Genus Tylophorella Vain. (1890), incertae sedis
               16a [Genus Tylophorellomyces Cif. & Tomas. (1953), incertae sedis] see Genus Tylophorella Vain. (1890)
               17 Genus Wegea Aptroot & Tibell (1997), incertae sedis