Orthoceras subtriangulare Gemmellaro, 1889 Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Animalia phylum Mollusca class Cephalopoda order Orthocerida family Orthoceratidae genus Orthoceras species Orthoceras subtriangulare Name Homonyms Orthoceras subtriangulare Gemmellaro, 1889