Mollusca Linnaeus, 1758 - molluscs see Phylum Mollusca Linnaeus, 1758
Count: 410f; †195f
   Gastropoda Cuvier, 1795 see Class Gastropoda Cuvier, 1795
  Count: [f†f] 410f; †172f
     Clade Heterobranchia Burmeister, 1837 see Superorder Heterobranchia Burmeister, 1837
    Count: [f†f] 238f; †29f
       Informal Group Opisthobranchia Milne-Edwards, 1846 see Order Opisthobranchia Milne-Edwards, 1848
      Count: [f†f] 100f; †1f
         Clade Thecosomata Gray, 1840 see Suborder Thecosomata Blainville, 1824
        Count: [f†f] 5f; †1f
           Superfamily Cavolinioidea Gray, 1850 (1815)
          Count: [f†f] 2f; †1f
             Family Cavoliniidae Gray, 1850 (1815)
            Count: -
               Subfamily Cavoliniinae Gray, 1850 (1815)
              Count: -