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
       Superfamily †Subulitoidea Lindström, 1884, incertae sedis
         1 Family †Subulitidae Lindström, 1884
         2 Family †Ischnoptygmatidae Erwin, 1988