Perissodactyla

order of mammals Odd-toed Ungulates (Perissodactyla) is an order comprising closely related families of organisms. It contains 3 families with 16 known species. This includes the family groups Horses & Zebras, Rhinos, and Tapiridae. Among its members, 10 species are currently classified as threatened (Critically Endangered, Endangered, or Vulnerable). It belongs to Mammals (Mammalia).