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
       1 Family †Craspedostomatidae Wenz, 1938, incertae sedis
       2 Family †Pragoscutulidae Frýda, 1998, incertae sedis
       3 Superfamily †Nerrhenoidea Bandel & Heidelberger, 2001, incertae sedis
       4 Superfamily †Oriostomatoidea Koken, 1896, incertae sedis
       5 Superfamily †Palaeotrochoidea Knight, 1956, incertae sedis
       6 Superfamily †Platyceratoidea Hall, 1879, incertae sedis
       7 Clade †Cyrtoneritimorpha Frýda, 1998
       8 Clade Cycloneritimorpha Frýda, 1998