The discovery of Tachiraptor admirabilis forces a rethink of dinosaur life in Pangaea.
Remains of a predatory dinosaur, roughly 5 to 6 feet long, have been found in the Northernmost Andes Mountains near Venezuela’s western border. The animal, Tachiraptor admirabilis, lived about 200 million years ago during the early Jurassic period and is one of only two species ever found in what is now Venezuela.
During the early Jurassic, Venezuela was part of the equatorial warm belt of Pangaea. Pangaea is the name given to the supercontinent made up of all current continents before they began to drift apart.
“Pangaea was in the process of breaking up back then,” Langer told Live Science. This area was a rift valley, a valley created by the rifting of the land, “like what we have in East Africa now, a rift that ultimately created the northern Atlantic Ocean. There was a lot of volcanic activity around, and in the valley, [there was] a meandering river, along which were patches of forest where this dinosaur lived,” said lead study author Max Langer, a vertebrate paleontologist at the University of São Paulo in Brazil to Live Science.
The warm belt has long been thought to have been largely uninhabited by dinosaurs. The only other remains found in Venezuela belonged to the small plant eating Laquintasaura venezuelae. However, the discovery of a medium sized predator in the region suggest that more life may have been present than previously thought.
Only the shinbone and part of the hip bone of the Tachiraptor admirabilis have been found to date. It can be dangerous to make assumptions about dinosaurs based on incomplete skeletons, as the brontosaurus which never actually existed, can attest. In this case, however the researchers have additional clues.
The animal’s shinbone made it possible to estimate the dinosaur’s height and allowed it classified it as a sister group of the Averostra. Averosta is a group which included nearly all predatory dinosaurs.
The paper detailing the new Venezuelan find can be found in the October 8 edition of the journal Royal Society Open Science.
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