Phylum [Mollusca] Linnaeus, 1758 - molluscs
Class Gastropoda Cuvier, 1795 - snails and slugs
Subclass Prosobranchia Milne-Edwards, 1848 - prosobranchs
see Class Gastropoda Cuvier, 1795
Order Neogastropoda Wenz, 1938
see Suborder Neogastropoda Wenz, 1938
Suborder Toxoglossa (Troschel, 1848)
see Superfamily Conacea Rafinesque, 1815
Superfamily Conacea Rafinesque, 1815
see Superfamily Conoidea Fleming, 1822
Family Cancellariidae Forbes & Hanley, 1851 - nutmeg snails
Subfamily Trigonostomoninae F.J. Springsteen & F.M. Leobrera, 1986
see Subfamily Trigonostomatinae Cossmann, 1899
Genus Trigonostoma Blainville, 1827