Phylum Mollusca Linnaeus, 1758 - molluscs
Count: [*†*] 8c;49o;641f;6099g; †2f;162g [24 Jan 2022]
   Class Gastropoda Cuvier, 1795 - snails and slugs
  Count: [*] 21o;416f;4650g; †136g [13 Dec 2021]
     Subclass Prosobranchia Milne-Edwards, 1848 - prosobranchs see Class Gastropoda Cuvier, 1795
    Count: [*†*] 6o;172f;2489g; †135g [14 Oct 2021]
       Order Caenogastropoda Cox, 1960 see Superorder Caenogastropoda Cox, 1960
      Count: [*†*] 110f;1268g; †39g [17 Sep 2021]
         Superfamily Rissooidea Gray, 1847
        Count: [*†*] 26f;415g; †3g [9 Jul 2021]
           Family Hydrobiidae Stimpson, 1865
          Count: [*] 176g [4 Jul 2021]
             Subfamily Hydrobiinae Stimpson, 1865
            Count: [*] 30g [1 Jul 2021]
               Genus Opacuincola Ponder, 1966
              Count: -