Argia nigrior Calvert, 1909 Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Animalia phylum Arthropoda class Insecta order Odonata family Coenagrionidae genus Argia species Argia nigrior Name Synonyms Argia gerhardi nigrior Calvert, 1909 Argia mariensis Calvert, 1961 Homonyms Argia nigrior Calvert, 1909