Asaphus crassicauda (Wahlenberg, 1826) Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Animalia phylum Arthropoda class Trilobita order Corynexochida family Illaenidae genus Illaenus species Illaenus crassicauda Name Homonyms Asaphus crassicauda (Wahlenberg, 1826)