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 Acavoidea Pilsbry, 1895
               Family Acavidae Pilsbry, 1895
                 1 Subfamily Acavinae Pilsbry, 1895 see Family Acavidae Pilsbry, 1895
                 2 Subfamily Clavatorinae Thiele, 1926 [monotypic] see Family Acavidae Pilsbry, 1895