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 Assimineidae Adams & Adams, 1856
             Subfamily Omphalotropidinae Thiele, 1927
               1 Genus Omphalotropis Pfeiffer, 1851
               2 Genus Allepithema Tomlin, 1930
               3 Genus Balambania Crosse, 1891
               4 Genus Cyclomorpha Pease, 1871
               5 Genus Garretia Pease, 1873, orth. inval. see Genus Garrettia Paetel, 1873
               6 Genus Gonatorhyphe Thiele, 1929, orth. inval. see Genus Gonatorhaphe Möllendorff, 1898
               7 Genus Pseudassiminea Thiele, 1927
               8 Genus Pseudocyclotus Thiele, 1894
               9 Genus Quadrasiella Möllendorff, 1894