Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Gastropoda Cuvier, 1795 - snails and slugs
     Subclass Divasibranchia Minichev & Starobogatov, 1975
       Order Stylommatophora Schmidt, 1855 see Infraorder Stylommatophora Schmidt, 1855
         (Achatinid Sigmurethra)
           Suborder Sigmurethra Pilsbry, 1900 see Group Sigmurethra Pilsbry, 1900
             Superfamily Punctoidea Morse, 1864
               Family Otoconchidae Cockerell, 1893 [monotypic] see Subfamily Otoconchinae Cockerell, 1893
                 Genus Otoconcha Hutton, 1884
                   Subgenus Maoriconcha Dell, 1952