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
           Subclade Placobranchacea Jensen, 1996 see Suborder Placobranchacea Jensen, 1996, orth. inval.
             1 Superfamily Placobranchoidea Gray, 1840, orth. inval. see Superfamily Plakobranchoidea Gray, 1840
             2 Superfamily Limapontioidea Gray, 1847