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
               Genus Omphalotropis Pfeiffer, 1851
                 Subgenus Oriella Thiele, 1927