Cyclostoma pupiforme G.B.Sowerby I, 1843 Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Animalia phylum Mollusca class Gastropoda order Littorinimorpha family Annulariidae genus Chondropoma species Chondropoma pupiforme Name Homonyms Cyclostoma pupiforme G.B.Sowerby I, 1843