Phylum Ascomycota Caval.-Sm. (1998) - sac fungi
   Subphylum Pezizomycotina O.E. Erikss. & Winka (1997)
     Class Lecanoromycetes O.E. Erikss. & Winka (1997)
       Subclass Lecanoromycetidae P.M.Kirk, P.F. Cannon, J.C. David & Stalpers (2001), nom. inval. see Subclass Lecanoromycetidae P.M.Kirk, P.F. Cannon, J.C. David & Stalpers ex Miądl., Lutzoni & Lumbsch (2007)
         Order Peltigerales Walt. Watson (1929)
           Suborder Peltigerineae
             Family Placynthiaceae E. Dahl (1950), nom. cons.
               1 Genus Hertella Henssen (1985)
               2 Genus Koerberia A.Massal. (1854)
               3 Genus Leptochidium M. Choisy (1952)
               4 Genus Placynthiopsis Zahlbr. (1932)
               5 Genus Placynthium (Ach.) Gray (1821)
               6 ?Genus Polychidium (Ach.) Gray (1821)
               7 Genus Vestergrenopsis Gyeln. (1940)