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
         Suborder Orthurethra Pilsbry, 1900
           Superfamily Achatinelloidea Gulick, 1873 [monotypic]
             Family Achatinellidae Gulick, 1873
               Subfamily Achatinellinae Gulick, 1873
                 1 Genus Achatinella Swainson, 1828
                 2 Genus Newcombia Pfeiffer, 1854
                 3 Genus Partulina Pfeiffer, 1854
                 4 Genus Perdicella Pease, 1870