Phylum Mollusca Linnaeus, 1758 - molluscs
   Subphylum Conchifera Gegenbauer, 1878
     Class Gastropoda Cuvier, 1795 - snails and slugs
       Subclass Eogastropoda Ponder & Lindberg, 1995
         Order Patellogastropoda Lindberg, 1986
           Suborder Nacellina Lindberg, 1988 see Superfamily Nacelloidea Thiele, 1891
             Superfamily Acmaeoidea Carpenter, 1857 see Superfamily Lottioidea Gray, 1840
               1 Family Acmaeidae Forbes, 1850 - American limpets
               2 Family Lepetidae Gray, 1850
               3 Family Lottiidae Gray, 1840 - American limpets