archus, arch

Ruler
(from Greek word archos)

Andrewsarchus
  • When: Eocene
    (37–34 mya)
  • Where: Asia
  • What: Mammal
  • Weight: 1 metric ton
  • Length: 3.5 meters
  • Diet: Carnivorous
  • Discovered: 1924

Archelon
  • When: Late Cretaceous
    (80–66 mya)
  • Where: North America
  • What: Turtle
  • Weight: 2.2 metric tons
  • Length: 4.5 meters
  • Diet: Omnivorous
  • Discovered: 1896
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