Fauna
Mammal

Archaeotherium mortoni

Archaeotherium mortoni

Also known as Hell Pig, North American Entelodont

Archaeotherium mortoni was a dominant, heavily built artiodactyl that roamed the floodplains and semi-arid savannas of Oligocene North America. Despite its popular nickname as a 'hell pig', it was more closely related to modern hippopotamuses and whales than true swine. Equipped with massive flaring cheek flanges, bone-crushing jaws, and a keen sense of smell, it dominated open landscapes as a formidable omnivore and aggressive scavenger.

PrehistoricOmnivore
Archaeotherium mortoni reference
Chris Woodrich / CC BY-SA 4.0 · cc-by-sa
—observations
—countries
—peak records
ExtinctConservation statusIUCN Red List categoriesLCNTVUENCREWEXExtinctRed List categories, explained →
Key facts
Diet & preySubhyracodon, Merycoidodon, Mesohippus
Predators
  • Hyaenodon horridus
  • Nimravus
  • Hoplophoneus
ThreatsClimate cooling, aridification, and faunal turnover during the mid-Tertiary
HabitatsWooded grasslands, riverine floodplains, and open savannahs of North America
Life spanApproximately 15–25 years
Classification
  1. FamilyEntelodontidae
  2. SpeciesArchaeotherium mortoni
Range & activity
Range data is not available yet.
Safe observation
Interaction riskLow
  1. Low
  2. Moderate
  3. High
  4. Very high
Why interaction risk is low
Extinct; known only from fossil specimens and poses no risk to humans.
Responsible observation
  • Museum Viewing: Examine the deep bite marks preserved on skulls, which reveal fierce face-biting between rivals.
  • Fossil Etiquette: Leave any suspected fossilized bones undisturbed and report discoveries to certified paleontologists.
Related species
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