? johnstoni Silberling & Nichols, 1982 Dataset GBIF Backbone Taxonomy Rank UNRANKED Classification kingdom Animalia phylum Mollusca class Cephalopoda order Ceratitida family Ceratitidae Name Homonyms ? johnstoni Heller, 1867 ? johnstoni Sowerby, 1824 ? johnstoni Stirton & Christian, 1940 ? johnstoni Mawby, 1965 ? johnstoni Thomas, 1898 ? johnstoni Shelley, 1887 ? johnstoni Silberling & Nichols, 1982