Mollusca Linnaeus, 1758 - molluscs see Phylum Mollusca Linnaeus, 1758
   Gastropoda Cuvier, 1795 see Class Gastropoda Cuvier, 1795
     Clade Vetigastropoda Salvini-Plawen, 1980 see Order Vetigastropoda Salvini-Plawen, 1980
       Superfamily †Porcellioidea Koken, 1895
         1 Family †Porcelliidae Koken, 1895
         2 Family †Cirridae Cossmann, 1916
         3 Family †Discohelicidae Schröder, 1995
         4 Family †Pavlodiscidae Frýda, 1998