Ancestors reptiles lived with dinosaurs for millennia, because they survived the extinction 250 ma ago on Earth?

New fossil finds in Brazil. The fossils would be the ancestors of the dinosaurs, the precursors of a species older than the dinosaurs we know. The findings suggest that this ancient lineage coexisted along with the dinosaurs. These fossils Reptiles pre-dinosaurs show a remarkable coexistence of differentiated species during the same periods and for long periods. In mid-November 2016 a group of researchers from Brazil announced the discovery of two types of new pre-dinosaurs that science did not know about.


What was the discovery?

The fossils demonstrated the concurrence of new “lagerpetids” : the Buriolestes schultzi and the Polesinensis Ixalerpeton, that were unearthed in layers of antiquity of about 230 million years, in the Santa Maria Carnian Formation, which is one of the oldest rocky places that It is known and where they have located endless prehistoric footprints of dinosaurs.


What is a Lagerpetids?

This species is a distant relative of the dinosaurs that belongs to the group or branch of the Dinosauromorphos . They are very small in size and length but they already have very developed motor devices. They are remnants of the Late Triassic, and can be found not only in Brazil, but also in other parts of the Earth such as New Mexico, Texas, Arizona, and Africa, since the South American and African continent was millions of years ago together in a single land space in the Pangea era.

This discovery basically demonstrates that this species of pre-dinosaurs or Lagerpetids , such as Polesinensis Ixalerpeton , coexisted along with the most primitive original dinosaurs which could point to this more remote species did not quickly separate from its more “giant offspring” but coexisted for millions of years, something quite curious scientifically speaking.

These revelations were consummated during the reconstruction of the two skeletons that they discovered between the years 200-2010, during the excavations carried out in Rio Grande do Sul, located in the South of Brazil, by the scientists belonging to the University of Sao Paulo, and to the Lutheran University, of Brazil. It was subsequently published in the American scientific journal Current Biology .

According to the professor from the Lutheran University of Brazil: “The remains found are the best preserved specimens that provide information on the origin and evolution of dinosaurs.”

On the other hand the researcher in charge of the University of São Paulo said about the finding : “the place where the dinosaurs were born was in South America and in Africa, since they were the same continent, in which the ancestors of the Dinosaurs originated. “The new pre-dinosaur species were named Buriolestes schultzi and Polesinensis Ixalerpeton .

According to the calculations of the researchers the Buriolestes schultzi could reach a length of 1.4-1.5 meters in height, and a weight of about 7 kg. And the Ixalerpeton polesinensis , could have a height of about 40 cm in length, 15 cm in height, with a weight of about 150 grams. Through the reconstruction of the skeletons it was concluded that these types of pre-dinosaurs were very small predators , that they could move on their two hind legs and feed on their front appendages, as small and agile as a bird of prey. medium size today.

-In the drawing (A) appears in the lower left corner the animal species Polesinensis Ixalerpeton , and to the right of the image would be the Buriolestes schultzi which is larger in size.

These species are the precursors of the dinosaurs, they conserved their smaller bone elements, in the samples that were collected together in the Buriol ravine, located in São João do POLESINE-RS, Brazil; Alemoa members, Santa María Formation; Candelária Sequence, Paraná Basin.

-In this representation (B) you can see how the species could be, Buriolestes schultzi , which would be the animals that are in the upper part of the drawing. And the Ixalerpeton would be placed in the lower part of the drawing.



What did the scientists conclude?

“With this material it is possible to say that the dinosaurs and their precursor lived next to each other, and that the increase of the dinosaurs was more gradual, not a rapid explosion of diversity, which leads other animals to the moment of extinction. “

“The rocks of the region are extremely rich in fossils, which tell the historical groups that reveal the origins of dinosaurs and mammals.”

Therefore the origin of the dinosaurs must have occurred before 230 million years ago in the ancient Gondwana Super Continent , in a land that today corresponds to South America, in this case, Brazil and Argentina.

These lagerpétidos were small reptiles similar to the dinosaurs that arose around 230 million years ago, which would confirm the concurrence of predecessor and dinosáuricas species during the same Triassic period, in the regions of the North of the Pangea Super Continent, Gondwana.


Skulls of pre-dinosaur reptiles found?

New fossil skulls was also found in Brazil. This new finding would represent the reptilian ancestor of the dinosaurs, and evidence the origins of the dinosaurs after the event of mass extinction occurred about 252 million years ago where 90% of life on Earth disappeared .

The fossilized skull would belong to the animal species – Teyujagua Paradoxa – a ferocious reptile lizard found in Rio Grande do Sul State of Sao, in Brazil . This species was similar to the current but not yet developed crocodile. Its sharp teeth, its nose, and its large mouth seem to show that its food would be fish, or small reptiles located in freshwater ponds.

The fossils found in the Permianotriásico – Mesozoic zone, that is to say during the Permian and the Triassic , survived the massive extinction occurred about 252 million years ago. This predecessor of the crocodile is more current than the previous mentioned species of pre-dinosaurs -Buriolestes schultzi and Polesinensis Ixalerpeton.

The Texajagua paradoxa is one of the morphological transitions between the archosauriforms and the most primitive reptiles. This animal, the Teyuajagua Paradoxa, was a small reptile, four-footed, that grew to measure approximately 1.5 meters, and that lived on the banks of lakes and rivers where they hunted small amphibians and reptiles similar to lizards.

In tune with the findings, it can be determined that the pre-dinosaurs – Buriolestes schultzi and Polesinensis Ixalerpeton – were the ancestors of the Teyujagua Paradoxa species, correlating with the genesis of dinosaurs, crocodiles and birds, and although a little risky, it must be said that they are the representatives of a reptilian line that survived the great terrestrial catastrophes, and that “surprisingly” coexisted with the ancestral dinosaurs that we all know.

How did the descendants of dinosaurs develop in gigantic sizes?

What intervention should have been suffered by the different species so that the great development derived from the enormous exotic variety of reptiles and dinosaurs could arise?

The evolution of the dinosaurs of the earth owes its origin to the species, to what Darwin proposed in 1861, or is it through genetic manipulation?