Phylum [Mollusca] Linnaeus, 1758 - molluscs
   Class Gastropoda Cuvier, 1795 - snails and slugs
     Subclass Prosobranchia Milne-Edwards, 1848 - prosobranchs see Class Gastropoda Cuvier, 1795
       Order Heterogastropoda see Superfamily Heterogastropoda
         Suborder Ptenoglossa Gray, 1853 see Infraorder Ptenoglossa Gray, 1853
           Superfamily Architectonicacea Gray, 1840, nom. illeg. see Superfamily Architectonicoidea Gray, 1850
             Family Mathildidae Dall, 1889
               Genus Mathilda Semper, 1865