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 Architectonicoidea Gray, 1850
           Family Mathildidae Dall, 1889
             Genus Mathilda Semper, 1865
               1 Subgenus Mathilda Semper, 1865
               2 Subgenus Brookesena Finlay, 1926 see Genus Brookesena Finlay, 1926
               3 Subgenus Fimbriatella Sacco, 1895