Crepidula onyx Sowerby, 1814 Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Animalia phylum Mollusca class Gastropoda order Littorinimorpha family Calyptraeidae genus Crepidula species Crepidula onyx Name Homonyms Crepidula onyx G.B.Sowerby I, 1824 Crepidula onyx Sowerby, 1814