Kingdom Fungi R.T.Moore (1980) - fungi
   Subkingdom Dikarya Hibbett, T.Y. James & Vilgalys (2007)
     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 ex Miądl., Lutzoni & Lumbsch (2007)
             Order Peltigerales Walt. Watson (1929)
               Genus Collema Weber ex F.H. Wigg. (1780), nom. sanct., nom. cons.