Phylum [Mollusca] Linnaeus, 1758 - molluscs
Count: -
   Class Gastropoda Cuvier, 1795 - snails and slugs
  Count: -
     Subclass Opisthobranchia Milne-Edwards, 1848 - opisthobranchs see Order Opisthobranchia Milne-Edwards, 1848
    Count: [g] 3o;6f;11g
       Order Cephalaspidea Fischer, 1883
      Count: [g] 4f;7g
         1 Superfamily Bullacea see Superfamily Bulloidea Gray, 1827
        Count: [g] 2f;3g
         2 Superfamily Acteonacea d'Orbigny, 1835 see Superfamily Acteonoidea d'Orbigny, 1843
        Count: [g] 2f;4g