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 Oleacinoidea H. Adams & A. Adams, 1855
               Family Spiraxidae Baker, 1939
                 Subfamily Euglandininae Baker, 1941
                   Genus Euglandina Crosse & Fischer, 1870
                     1 Subgenus Cosmomenus Baker, 1941
                     2 Subgenus Laeviglandina Pilsbry, 1908
                     3 Subgenus Singleya Baker, 1941