? diadema Goldfuss, 1837 Dataset GBIF Backbone Taxonomy Rank UNRANKED Classification kingdom Animalia phylum Mollusca class Cephalopoda order Goniatitida family Goniatitidae genus Goniatites species Goniatites diadema Name Homonyms ? diadema Goldfuss, 1837 ? diadema Hartlaub, 1843 ? diadema Studer, 1876 ? diadema Spix, 1824