Mollusca Linnaeus, 1758 - molluscs see Phylum Mollusca Linnaeus, 1758
   Gastropoda Cuvier, 1795 see Class Gastropoda Cuvier, 1795
     Clade Heterobranchia Burmeister, 1837 see Superorder Heterobranchia Burmeister, 1837
       Informal Group Opisthobranchia Milne-Edwards, 1846 see Order Opisthobranchia Milne-Edwards, 1848
         Clade Cephalaspidea Fischer, 1883 see Order Cephalaspidea Fischer, 1883
           Superfamily Philinoidea Gray, 1850 (1815)
             1 Family Philinidae Gray, 1850 (1815)
             2 Family Aglajidae Pilsbry, 1895 (1847)
             3 Family Cylichnidae Adams & Adams, 1854
             4 Family Gastropteridae Swainson, 1840
             5 Family Philinoglossidae Hertling, 1932
             6 Family Plusculidae Franc, 1968
             7 Family Retusidae Thiele, 1925