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 Mesurethra [monotypic]
           Superfamily Clausilioidea Gray, 1855 [monotypic]
             Family Clausiliidae Gray, 1855
               Subfamily Zaptychinae Zilch, 1954 see Subfamily Zaptyxinae Zilch, 1954
                 1 Genus Zaptyx Pilsbry, 1900
                 2 Genus Metazaptyx Pilsbry, 1905
                 3 Genus Oligozaptyx Pilsbry, 1905
                 4 Genus Selenoptyx Pilsbry, 1908
                 5 Genus Zaptychopsis Ehrmann, 1927