Phylum Mollusca Linnaeus, 1758 - molluscs
Class Gastropoda Cuvier, 1795 - snails and slugs
Subclass Prosobranchia Milne-Edwards, 1848 - prosobranchs
see Class Gastropoda Cuvier, 1795
Superorder Archaeogastropoda Thiele, 1925
Order Vetigastropoda Salvini-Plawen, 1980 - archaeogastropods s.l.
Superfamily Trochoidea Rafinesque, 1815
Family Trochidae Rafinesque, 1815 - top snails
Subfamily Trochinae Rafinesque, 1815
Tribe Trochini Rafinesque, 1815
Genus Trochus Linnaeus, 1758
Subgenus Thorista Iredale, 1915