Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Gastropoda Cuvier, 1795 - snails and slugs
     Subclass Prosobranchia Milne-Edwards, 1848 - prosobranchs see Class Gastropoda Cuvier, 1795
       Order Caenogastropoda Cox, 1960 see Superorder Caenogastropoda Cox, 1960
         Suborder Architaenioglossa Haller, 1890
           Superfamily Cyclophoroidea Gray, 1847
             Family Cyclophoridae Gray, 1847
               Subfamily Pterocyclinae Kobelt & Möllendorff, 1897 see Tribe Pterocyclini Kobelt & Möllendorff, 1897
                 1 Genus Pterocyclus Agassiz, 1846, nom. illeg. see Genus Pterocyclos Benson, 1832
                 2 Genus Pearsonia Kobelt, 1902
                 3 Genus Platyrhaphe Möllendorff, 1890
                 4 Genus Rhiostoma Benson, 1860