? pratensis Cook, 1926 Dataset GBIF Backbone Taxonomy Rank UNRANKED Classification kingdom Animalia phylum Chordata class Mammalia order Perissodactyla family Brontotheriidae Name Homonyms ? pratensis Less. ? pratensis Hibbard, 1944 ? pratensis Cook, 1926 ? pratensis W.D.J.Koch ex Spruce ? pratensis Schaeff.