Hyaenodon. Despite the name, these are not relatives of Hyenas. They are more dangerous by far.
— Allen, about Hyaenodon

Hyaenodon (name meaning "Hyaena Tooth") is a genus of Hyaenodontidae (fast and vicious dog-like carnivorous predatory mammals) that originated during the Late Eocene, and through to the Oligocene and the Early Miocene periods in Mongolia.


Era & DiscoveryEdit

Hyaenodon lived during the Oligocene period over 25 million years ago. They were perhaps the apex predators in their environment, often rivaled by the prehistoric hogs Entelodon. Hyaenodon was first discovered in 1838.

Physical AttributesEdit

Hyaenodon were large, dog-like, territorial and predatory creatures. Despite their name, Hyaenodon were not at all related to modern-day Hyenas, but they were by far more dangerous.

Next to a large animal like an Indricotherium, Hyaenodon may have had a smaller appearance, but these carnivorous mammals were the size of modern rhinos, 5-6 feet tall, more than 20 feet (6 m) long, weighed a total of 500 kg, and were easily capable of killing an Indricotherium calf, if they could get passed the mothers. Hyaenadon had a bone–shattering force of over 1,000 pound per square inch.

Behavior & Traits Edit

Hyaenodon was an apex predator. This animal preyed on the bizarre group of animals called Chalicotheres, newborn or juvenile Indricotheres, bear-dogs and a large, omnivorous relative of pigs and wild boars, the Entelodons. Its sheer size and meat-shearing teeth would make a deadly combination, making it an efficient and successful predator. It would also hunt cooperatively with other members of its kind. However, like most other early carnivorous mammals, Hyaenodon wasn't the brightest of animals.