Classification
Biota [regio]Animalia [regnum]
Chordata [phylum]
Mammalia [classis]
Perissodactyla [ordo]
Ordo Perissodactyla contains the following taxa:
Brontotheriidae [familia]
Equidae [familia]
Palaeotheriidae [familia]
Rhinocerotidae [familia]
Tapiridae [familia]