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 Neotaenioglossa Haller, 1882
see Order Sorbeoconcha Ponder & Lindberg, 1997
Superfamily Littorinoidea Children, 1834
Family Annulariidae Henderson & Bartsch, 1920
see Tribe Annulariini Henderson & Bartsch, 1920
Subfamily Rhytidopomatinae Henderson & Bartsch, 1920
see Tribe Rhytidopomatini Henderson & Bartsch, 1920
Genus Clydonopoma Pilsbry, 1933
Subgenus Eccritopoma Pilsbry, 1933