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
         "Group" Acochlidiacea Odhner, 1937 see Suborder Acochlidiacea Odhner, 1937
        Count: [f] 10f
           Superfamily Hedylopsoidea Odhner, 1952 see Suborder Hedylopsacea Starobogatov, 1983
          Count: [f] 6f
             Family Tantulidae Rankin, 1979
            Count: -