Question

Because an oryx has four toes on each foot, this hoofed mammal is classified in the order called

Answer 1

if a hoofed animal has an even amount of toes on each foot it would be known as a artiodactyla. 

Answer 2

Answer is Artiodactyla.

Order Artiodactyla of class Mammalia includes hoofed animals with an even number of toes (Oryx having 4 toes), other examples are deer, camels, cows, sheep, hippos, pigs, etc. whereas, animals with odd number of toes included in the order Perissodactyla. Examples are horses, rhinos, tapirs.