Mollusca Linnaeus, 1758 - molluscs see Phylum Mollusca Linnaeus, 1758
   Gastropoda Cuvier, 1795 see Class Gastropoda Cuvier, 1795
     ?Superfamily †Euomphaloidea White, 1877
       1 Family †Euomphalidae White, 1877
       2 Family †Helicotomidae Wenz, 1938
       3 Family †Lesueurillidae Wagner, 2002
       4 Family †Omphalocirridae Wenz, 1938
       5 Family †Omphalotrochidae Knight, 1945