Nautilus beccarii var. perversus G.Walker, 1784 Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Chromista phylum Foraminifera class Globothalamea order Rotaliida family Ammoniidae genus Ammonia species Ammonia beccarii Name Homonyms Nautilus beccarii var. perversus G.Walker, 1784 Nautilus beccarii var. perversus Montagu, 1803