Phylum Mollusca Linnaeus, 1758 - molluscs
Class Gastropoda Cuvier, 1795 - snails and slugs
Subclass Prosobranchia Milne-Edwards, 1848 - prosobranchs
see Class Gastropoda Cuvier, 1795
Order Neogastropoda Wenz, 1938
see Suborder Neogastropoda Wenz, 1938
Suborder Stenoglossa Bouvier, 1887
Superfamily Muricoidea Rafinesque, 1815
Family Muricidae Rafinesque, 1815 - drills
Subfamily Rapaninae Gray, 1853
Genus Cronia Adams & Adams, 1853
Subgenus Ergalatax Iredale, 1931
see Genus Ergalatax Iredale, 1931