Phylum Ascomycota Caval.-Sm. (1998) - sac fungi
   Subphylum Pezizomycotina O.E. Erikss. & Winka (1997)
     Class Arthoniomycetes O.E. Erikss. & Winka (1997)
       Order Lichenostigmatales Ertz, Diederich & Lawrey (2014) [monotypic]
         Family Phaeococcomycetaceae McGinnis & Schell (1985)
           1 Genus Etayoa Diederich & Ertz (2014)
           2 Genus Lichenostigma Hafellner (1983)
           3 Genus Phaeococcomyces de Hoog (1979)