Cyclostoma Sowerby, 1847 Dataset GBIF Backbone Taxonomy Rank GENUS Classification kingdom Animalia phylum Mollusca class Gastropoda genus Cyclostoma Name Homonyms Cyclostoma Lamarck, 1799 Cyclostoma Kirby, 1838 Cyclostoma Otto, 1823 Cyclostoma P.L.Crouan & H.Crouan, 1867 Cyclostoma Draparnaud, 1801 Cyclostoma Sowerby, 1847