Koldinioidia trapezoidalis (Zhang, 1983) Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Animalia phylum Arthropoda class Trilobita order Ptychopariida family Shumardiidae genus Akoldinioidia species Akoldinioidia trapezoidalis Name Homonyms Koldinioidia trapezoidalis (Zhang, 1983)