Isotomurus retardatus Mills & Rolfs, 1933 Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Animalia phylum Arthropoda class Collembola order Entomobryomorpha family Isotomidae genus Isotomurus species Isotomurus retardatus Name Homonyms Isotomurus retardatus J.W.Folsom, 1937 Isotomurus retardatus Mills & Rolfs, 1933 Isotomurus retardatus K.Christiansen & P.Bellinger, 1998