Passalus unicornis Gravely, 1918 Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Animalia phylum Arthropoda class Insecta order Coleoptera family Passalidae genus Passalus species Passalus unicornis Name Homonyms Passalus unicornis Le Peletier & Serville, 1828 Passalus unicornis Gravely, 1918