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.
Suborder Neritopsina Cox, 1960
see Order Neritopsina Cox & Knight, 1960
Superfamily Neritoidea Rafinesque, 1815
Family Neritidae Rafinesque, 1815 - nerites
Subfamily Neritinae Rafinesque, 1815
Genus Theodoxus Montfort, 1810
Subgenus Neritaea Roth, 1855