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 Cerithioidea Fleming, 1822
             Family Diastomatidae Cossmann, 1894
               Subfamily Diastomatinae Cossmann, 1894
                 1 Genus Diastoma Deshayes, 1850
                 2 Genus Alabina Dall, 1902
                 3 Genus Aurelianella Cossmann, 1893
                 4 Genus Fesandella Grundel, 1976
                 5 Genus Keliostoma Millard, 1996, orth. inval. see Genus Keilostoma Deshayes, 1850
                 6 Genus Sandbergeria Bosquet, 1860
                 7 Genus Teleostoma Harris & Burrows, 1891