Kingdom Animalia Linnaeus, 1758 - animals
Phylum Mollusca Linnaeus, 1758 - molluscs
Subphylum Cyrtosoma Runnegar & Pojeta Jr., 1974
see Phylum Mollusca Linnaeus, 1758
Class Gastropoda Cuvier, 1795 - snails and slugs
Subclass Prosobranchia Milne-Edwards, 1848 - prosobranchs
see Class Gastropoda Cuvier, 1795
Order Archaeogastropoda Thiele, 1925
see Order Vetigastropoda Salvini-Plawen, 1980
Suborder Pleurotomariina (Cox & Knight, 1960)
see Superfamily Pleurotomarioidea Swainson, 1840
Genus Diodora Gray, 1821