Equus Dataset NCBI Taxonomy Rank GENUS Classification kingdom Metazoa phylum Chordata class Mammalia order Perissodactyla family Equidae genus Equus Name Synonyms Amerhippus Asinus Dolichohippus Equus subg. Amerhippus Equus subg. Asinus Equus subg. Dolichohippus Equus subg. Equus Equus subg. Hemionus Equus subg. Hippotigris Equus subgen. Sussemionus Hemionus Hippotigris Sussemionus Homonyms Equus Equus subg. Equus