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
                 1 Family Pleurotomariidae Swainson, 1840 - slit snails
                 2 Family Scissurellidae Gray, 1847
                 3 Family Haliotidae Rafinesque, 1815 - abalones
                 4 Family Fissurellidae Fleming, 1822 - keyhole limpets