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 Sacoglossa Ihering, 1876 see Order Sacoglossa Ihering, 1876
           1 Subclade Oxynoacea Odhner, 1939 see Suborder Oxynoacea Odhner, 1939
           2 Subclade Placobranchacea Jensen, 1996 see Suborder Placobranchacea Jensen, 1996, orth. inval.