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
         Superfamily Rissooidea Gray, 1847
           Family Tornidae Sacco, 1896 (1884)
             Genus Cochliolepis Stimpson, 1858
               1 Subgenus Laciniorbis Martens, 1897
               2 Subgenus Tylaxis Pilsbry, 1953