Buenos Aires Times

argentina Paleontology

Dinosaur that defended itself with spiny backbone found in Patagonia

Herbivore that fended off predators with a row of spines running along its back and lived 140 million years ago unveiled in capital.

Monday 4 February, 2019
Picture of replicas of a
Picture of replicas of a "Bajadasaurus pronuspinax", a new long-spined dinosaur found in Patagonia, during its presentation in Buenos Aires, on February 4, 2019. Foto:AFP/Juan MABROMATA

More Argentina News

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 Patagonia.

The discovery of the new species of dicraeosauridae, christened "Bajadasaurus pronuspinax," was revealed in scientific journal Nature.

A reproduction of its spiny neck was exhibited in the Cultural Science Centre (Centro Cultural de la Ciencia) in Buenos Aires.

"We believe that the long and sharp spines – very long and thin – on the neck and back of Bajadasaurus and Amargasaurus cazaui (another dicraeosauridae) must have been to deter possible predators," said Pablo Gallina, an assistant researcher at the state council of scientific and technical investigations (CONICET) and Maimonides University.

"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," he added. "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 Neuquén province around 1,120 miles (1,800 kilometres) 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. 

It lived during the late Cretaceous period and could have fed on Bajadasaurus.

CONICET said in a statement the spines could have been used to regulate the dinosaur's temperature or even to render it more sexually attractive to a potential mate.

It said Bajadasaurus could have had a fleshy hump between the spines that served a similar role to that of a camel.

The Bajadasaurus skull is the best preserved example of a dicraeosauridae ever found.

"Studies suggest this animal spent much of its time feeding on ground plants while its eye sockets, close to the top of its skull, allowed it to key an eye on what was happening around it," said CONICET.




Top Stories

  1. 1The next space race starts in ChinaThe next space race starts in China
  2. 2Warning signs flash for Macri’s re-election hopes
  3. 3The not-so-peculiar tale of marijuana, Morales and the governor’s son
  4. 4Court slams Nahir Galarza with life sentence for boyfriend's murder
  5. 515 people diagnosed an hour: Argentina’s alarming cancer problem
  6. 6Emiliano Sala's body arrives in Argentina
  7. 7After economic crisis, Macri gov't officials rebound at elite universities
  8. 8Crowds flock to Progreso to pay tribute to footballer Emiliano Sala
  9. 9Cannabis flowers into a regional economic model
  10. 10'Objects found': Argentine footballer believed to have died in plane crash