Phylum Mollusca Linnaeus, 1758 - molluscs
Class Gastropoda Cuvier, 1795 - snails and slugs
Subclass Prosobranchia Milne-Edwards, 1848 - prosobranchs
see Class Gastropoda Cuvier, 1795
Order Caenogastropoda Cox, 1960
see Superorder Caenogastropoda Cox, 1960
Suborder Architaenioglossa Haller, 1890
Superfamily Cyclophoroidea Gray, 1847
Family Diplommatinidae Pfeiffer, 1856
Subfamily Diplommatininae Pfeiffer, 1856
Genus Opisthostoma Blanford & Blanford, 1860
Subgenus Plectostoma Adams, 1865