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 Pleurotomarioidea Swainson, 1840 [monotypic]
Family Pleurotomariidae Swainson, 1840 - slit snails
Subfamily Pleurotomarinae orth. inval.
see Subfamily Pleurotomariinae Swainson, 1840
Genus Perotrochus Fischer, 1885