[Mollusca] Linnaeus, 1758 - molluscs
   Gastropoda Cuvier, 1795 - snails and slugs
     Prosobranchia Milne-Edwards, 1848 - prosobranchs see Class Gastropoda Cuvier, 1795
       Archaegastropoda see Order Archaeogastropoda Thiele, 1925
         Pleurotomariacea see Superfamily Pleurotomarioidea Swainson, 1840
           Pleurotomariidae Swainson, 1840 - slit snails
             Perotrochus Fischer, 1885
               Perotrochus (Entemnotrochus) Fischer, 1885 see Genus Entemnotrochus Fischer, 1885