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 Vermetoidea Rafinesque, 1815 [monotypic] - worm snails
             Family Vermetidae Rafinesque, 1815 - worm snails
               1 Genus Vermetus Daudin, 1800
               2 Genus Dendropoma Mörch, 1861
               3 Genus Eualetes Keen, 1971
               4 Genus Petaloconchus Lea, 1843
               5 Genus Segmentella Thiele, 1925
               6 Genus Serpulorbis Sassi, 1827
               7 Genus Trypsycha Hughes, 1985, orth. inval. see Genus Tripsycha Keen, 1961