Equus excelsus (Leidy, 1858) Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Animalia phylum Chordata class Mammalia order Perissodactyla family Equidae genus Equus species Equus excelsus Name Synonyms Allozebra excelsus (Leidy, 1858) Asinus aguascalentensis (Mooser, 1959) Equus aguascalientensis (Mooser, 1959) Onager arellanoi Mooser, 1959 Onager hibbardi Mooser, 1959 Homonyms Equus excelsus (Leidy, 1858)