Mollusca Linnaeus, 1758 - molluscs see Phylum Mollusca Linnaeus, 1758
   Gastropoda Cuvier, 1795 see Class Gastropoda Cuvier, 1795
     Clade Neritimorpha Koken, 1896 see Order Neritimorpha Golikov & Starobogatov, 1975
       Clade Cycloneritimorpha Frýda, 1998
         Superfamily Neritopsoidea Gray, 1847
           1 Family Neritopsidae Gray, 1847
           2 Family †Cortinellidae Bandel, 2000
           3 Family †Delphinulopsidae Blodgett, Frýda & Stanley, 2001
           4 Family †Plagiothyridae Knight, 1956
           5 Family †Pseudorthonychiidae Bandel & Frýda, 1999
           6 Family Titiscaniidae Bergh, 1890