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
         (Helicid Sigmurethra)
           Superfamily Sagdoidea Pilsbry, 1895 [monotypic]
             Family Sagdidae Pilsbry, 1895
               1 Subfamily Sagdinae Pilsbry, 1895
               2 Subfamily Aquibaninae Vaught, 1989, orth. inval. see Subfamily Aquebaninae Baker, 1940
               3 Subfamily Platysuccineinae Baker, 1940 [monotypic]