Irvingella Ulrich & Resser, 1924 Dataset GBIF Backbone Taxonomy Rank GENUS Classification kingdom Animalia phylum Arthropoda class Trilobita order Ptychopariida family Elviniidae genus Irvingella Name Homonyms Irvingella Tiegh. Irvingella Rusconi, 1948 Irvingella Walcott, 1924 Irvingella Ulrich & Resser, 1924