Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Gastropoda Cuvier, 1795 - snails and slugs
     Subclass Heterobranchia Burmeister, 1837 [monotypic] see Superorder Heterobranchia Burmeister, 1837
       Order Heterostropha Fischer, 1885
         Superfamily Pyramidelloidea Gray, 1840
           Family Pyramidellidae Gray, 1840
             Subfamily Pyramidellinae Gray, 1840
               01 Genus Pyramidella Lamarck, 1799
               02 Genus Bacteridiella Saurin, 1959
               03 Genus Charilda Iredale, 1929
               04 Genus Contraxiala Laseron, 1956
               05 Genus Costabieta Laseron, 1956
               06 Genus Derjuginella Habe, 1958
               07 Genus Eucharilda Iredale, 1929
               08 Genus Eulimella Forbes & M'Andrew, 1846
               09 Genus Finlayola Laws, 1937
               10 Genus Herewardia Iredale, 1955
               11 Genus Levipyrgulina Laws, 1941
               12 Genus Otopleura Fischer, 1885
               13 Genus Puposyrnola Cossmann, 1921
               14 Genus Stylopyramis Thiele, 1929
               15 Genus Terelimella Laws, 1938
               16 Genus Tiberia Jeffreys, 1884