Kingdom [Animalia] Linnaeus, 1758 - animals
   Subkingdom Metazoa Haeckel, 1874 see Kingdom Animalia Linnaeus, 1758
     Division Eumetazoa Butschli, 1910 see Subkingdom Eumetazoa Butschli, 1910
       Subdivision Bilateralia
         Phylum Mollusca Linnaeus, 1758 - molluscs
           Subphylum Conchifera Gegenbauer, 1878
             Order Diotocardia
               Superfamily Pleurotomarioidea Swainson, 1840
                 Family Fissurellidae Fleming, 1822 - keyhole limpets
                   Genus Diodora Gray, 1821
                   Genus Emarginula Lamarck, 1801
                   Genus Fissurella Bruguière, 1789
                   Genus Puncturella Lowe, 1827