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 Streptostylinae Baker, 1941
see Subfamily Oleacininae Adams & Adams, 1855
Genus Streptostylops Pilsbry, 1933