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
               1 Genus Palaeocyclophorus Wenz, 1923
               2 Subfamily Cyclophorinae Gray, 1847
               3 Subfamily Spirostomatinae Tielecke, 1940 [monotypic]
               4 Subfamily Alycaeinae Blanford, 1864
               5 Subfamily Pterocyclinae Kobelt & Möllendorff, 1897 see Tribe Pterocyclini Kobelt & Möllendorff, 1897