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 Patelloidea Rafinesque, 1815
                 1 Family Patellidae Rafinesque, 1815 - limpets
                 2 Family Acmaeidae Forbes, 1850 - American limpets
                 3 Family Lepetidae Gray, 1850