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 Thecosomata Gray, 1840 see Suborder Thecosomata Blainville, 1824
           Superfamily Cavolinioidea Gray, 1850 (1815)
             1 Family Cavoliniidae Gray, 1850 (1815)
             2 Family Limacinidae Gray, 1840
             3 Family †Sphaerocinidae Janssen & Maxwell, 1995