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 Odostomiinae Casey, 1904
               01 Genus Odostomia Fleming, 1813
               02 Genus Chrysallida Carpenter, 1856
               03 Genus Cingulina Adams, 1860
               04 Genus Evalea Adams, 1860
               05 Genus Herviera Melvill & Standen, 1899
               06 Genus Koloonella Laseron, 1959
               07 Genus Liostomia Sars, 1878
               08 Genus Odostomella Bucquoy, Dautzenberg & Dollfus, 1883
               09 Genus Ondina de Folin, 1870
               10 Genus Pseudorissoina Tate & May, 1900
               11 Genus Tropeas Pacaud & Le Renard, 1995, orth. inval. see Genus Tropaeas Dall & Bartsch, 1904
               12 Genus Menestho Möller, 1842
               13 Genus Miralda Adams, 1863
               14 Genus Morrisonietta Brandt, 1968
               15 Genus Noemiamea Hoyle, 1886
               16 Genus Oscilla Adams, 1861
               17 Genus Peristichia Dall, 1889
               18 Genus Sayella Dall, 1885
               19 Genus Syrnola Adams, 1860
               20 Genus Tryptychus Vaught, 1989, orth. inval. see Genus Triptychus Mörch, 1875