Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Gastropoda Cuvier, 1795 - snails and slugs
     Subclass Prosobranchia Milne-Edwards, 1848 - prosobranchs see Class Gastropoda Cuvier, 1795
       Superorder Archaeogastropoda Thiele, 1925
         Order Docoglossa Troschel, 1866
           Suborder Euomphalina de Koninck, 1881 see Superfamily Euomphaloidea White, 1877
             Superfamily Patelloidea Rafinesque, 1815
               1 Family Acmaeidae Forbes, 1850 - American limpets
               2 Family Lottiidae Gray, 1840 - American limpets
               3 Family Patellidae Rafinesque, 1815 - limpets
               4 Family Nacellidae Thiele, 1891, nom. protect.
               5 Family Lepetidae Gray, 1850