Olenellus agellus Resser & Howell, 1938 Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Animalia phylum Arthropoda class Trilobita order Redlichiida family Olenellidae genus Olenellus species Olenellus agellus Name Homonyms Olenellus agellus Resser & Howell, 1938