Phylum Ascomycota Caval.-Sm. (1998) - sac fungi
   Subphylum Pezizomycotina O.E. Erikss. & Winka (1997)
     Class Dothideomycetes O.E. Erikss. & Winka (1997)
       Family Mytilinidiaceae Kirschst. (1924)
         1 Genus Actidium Fr. (1815), nom. sanct.
         2 Genus Lophium Fr. (1818), nom. sanct.
         3 Genus Mytilinidion Duby (1861)
         4 Genus Ostreichnion Duby (1862)
         5 Genus Ostreola Darker (1963)
         6 Genus Quasiconcha M.E.Barr & M. Blackw. (1981)
         7 Genus Zoggium Lar.N. Vassiljeva (2001)