• A herbivorous dinosaur that fended off predators with a row of spines running along its back and lived 140 million years ago has been found in Argentine Patagonia.
  • The discovery of the new species of dicraeosauridae, christened Bajadasaurus pronuspinax, was revealed in scientific journal Nature.
  • We believe that the long and sharp spines — very long and thin — of Bajadasaurus and Amargasaurus cazaui (another dicraeosauridae) must have been to deter predators.

  • We think that had they been just bare bone structures or covered only by skin, they could have been easily broken or fractured with a blow or when being attacked by other animals.
  • These spines must have been covered by a keratin sheath similar to what happens in the horns of many mammals.
  • Bajadasaurus was a quadruped and part of the wider Sauropod family that lived from the late Triassic period (around 230 million years ago) until the end of the late Cretaceous (70 million years ago).
  • Amargasaurus cazaui lived in the South American continent around 15 million years after Bajadasaurus and both species were found in the Neuquen province around 1,800 km south of Buenos Aires.
  • It’s the same zone in which Giganotosaurus carolinii, considered the biggest carnivorous dinosaur of all time, was discovered in 1993.