Phylum Mollusca Linnaeus, 1758 - molluscs
Class Gastropoda Cuvier, 1795 - snails and slugs
Subclass Prosobranchia Milne-Edwards, 1848 - prosobranchs
see Class Gastropoda Cuvier, 1795
Order Caenogastropoda Cox, 1960
see Superorder Caenogastropoda Cox, 1960
Suborder Architaenioglossa Haller, 1890
Superfamily Cerithioidea Fleming, 1822
Family Turritellidae Lovén, 1847 - turret snails
Subfamily Turritellinae Lovén, 1847
Genus Colpospira Donald, 1900
Subgenus Acutospira Kotaka, 1959