Knightoceras subcariniferum (Tzwetaev, 1888) Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Animalia phylum Mollusca class Cephalopoda order Nautilida family Koninckioceratidae genus Knightoceras species Nautilus subcariniferus Name Homonyms Knightoceras subcariniferum (Tzwetaev, 1888)