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• Newly Discovered Crocodile Ancestor Sonselasuchus Cedrus Transitioned From Four Legs to Two During Adulthood

  Published: Mar 9, 2026

  Section: Research

  Paleontologists have identified a Triassic reptile, Sonselasuchus cedrus, that uniquely shifted its posture from a quadrupedal adolescent to a bipedal adult. Found in Arizona’s Pet...