Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Gastropoda Cuvier, 1795 - snails and slugs
     Subclass Prosobranchia Milne-Edwards, 1848 - prosobranchs see Class Gastropoda Cuvier, 1795
       Superorder Archaeogastropoda Thiele, 1925
         Order Vetigastropoda Salvini-Plawen, 1980 - archaeogastropods s.l.
           Superfamily Seguenzioidea Verrill, 1884 [monotypic]
             Family Seguenziidae Verrill, 1884
               Genus Seguenziella Marshall, 1983, nom. illeg. see Genus Quinnia Marshall, 1988