Phylum Ascomycota Caval.-Sm. (1998) - sac fungi
   Subphylum Pezizomycotina O.E. Erikss. & Winka (1997)
     Class Lecanoromycetes O.E. Erikss. & Winka (1997)
       Subclass Ostropomycetidae V. Reeb, Lutzoni & Cl.Roux (2004)
         Order Pertusariales M. Choisy ex D.Hawksw. & O.E. Erikss. (1986)
           Family Pertusariaceae Körb. ex Körb. (1855)
             Genus Agyrium Fr. (1822), nom. sanct.