Orthoceras ludense (Sowerby, 1839) Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Animalia phylum Mollusca class Cephalopoda order Orthocerida family Geisonoceratidae genus Temperoceras species Orthoceras ludense Name Synonyms Orthoceras dahlii Barrande, 1870 Orthoceras omnium Barrande, 1868 Orthoceras temperans Barrande, 1867 Temperoceras ludense (Sowerby, 1839) Homonyms Orthoceras ludense (Sowerby, 1839)