? gemma Lindström, 1884 Dataset GBIF Backbone Taxonomy Rank UNRANKED Classification kingdom Animalia phylum Mollusca class Gastropoda family Bellerophontidae Name Homonyms ? gemma Tuomey & Holmes, 1856 ? gemma Dana, 1847 ? gemma Lindström, 1884 ? gemma Koken, 1888 ? gemma Sowerby, 1879 ? gemma Pugsley