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 "Lower Heterobranchia"
      Count: [f†f] 19f; †21f
         Superfamily Pyramidelloidea Gray, 1840
        Count: [f†f] 3f; †1f
           1 Family Pyramidellidae Gray, 1840
          Count: -
           2 Family Amathinidae Ponder, 1987
          Count: -
           3 Family †Heteroneritidae Gründel, 1998
          Count: -
           4 Family Murchisonellidae Casey, 1904
          Count: -