Mollusca Linnaeus, 1758 - molluscs see Phylum Mollusca Linnaeus, 1758
   Gastropoda Cuvier, 1795 see Class Gastropoda Cuvier, 1795
     Clade Caenogastropoda Cox, 1960 see Superorder Caenogastropoda Cox, 1960
       Zygopleuroid Group
         1 Family †Zygopleuridae Wenz, 1938
         2 Family Abyssochrysidae Tomlin, 1927
         3 Family †Polygyrinidae Bandel, 1993
         4 Family †Protorculidae Bandel, 1991
         5 Family Provannidae Warén & Ponder, 1991
         6 Family †Pseudozygopleuridae Knight, 1930