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 Pleurotomarioidea Swainson, 1840
         1 Family Pleurotomariidae Swainson, 1840 - slit snails
         2 Family †Catantostomatidae Wenz, 1938
         3 Family †Kittlidiscidae Cox, 1960
         4 Family †Phymatopleuridae Batten, 1956
         5 Family †Polytremariidae Wenz, 1938
         6 Family †Portlockiellidae Batten, 1956
         7 Family †Rhaphischismatidae Knight, 1956
         8 Family †Trochotomidae Cox, 1960 (1934)
         9 Family †Zygitidae Cox, 1960