New species of armless dinosaurs that roamed America, Africa and Asia discovered

Deepak Gupta February 19, 2022
Updated 2022/02/19 at 10:12 AM

Researchers have discovered a partially complete skull of a new species of dinosaur in Argentina that they say is a close relative of a group of armless dinosaurs that roamed the southern hemisphere. They say the new species, called Guemesia ochoai, offers new evidence of a unique ecosystem during the Late Cretaceous, more than 70 million years ago. Guemesia ochoai was a member of the Abelisauridae, a clade of carnivores that roamed what is now Africa, South America and India. The researchers said the newly discovered species çwould be a close relative of the abelisaurids’ ancestors.

However, Guemesia ochoai is different from its abelisaurid relatives in two ways. One, this dinosaur species has no horns; and two, he likely lived in what is now northern Argentina, where his skull was found, rather than the southern part of the country, where most abelisaurid remains were found. The second point suggests that G ochoai could live in varied ecosystems.

Seeing this from today’s perspective can be misleading as to how these animals roamed America, Africa and India as they are separate landmasses. But hundreds of millions of years ago, all these continents were combined into a supercontinent known as Pangea. Over time, as the tectonic plates shifted, these landmasses began to encroach on Gondwana and Laurasia. About 180 million years ago, Gondwana and Laurasia began to split, as did India.

However, the process was slow. And therefore the species would still be able to move between them. Some scientists say that the fauna of each landmass would have been basically the same.

“This new dinosaur is quite unusual for its kind. It has several key features that suggest it is a new species, providing important new information about an area of ​​the world that we don’t know much about,” Professor Anjali Goswami, co-author of the study and research leader at the Natural History Museum of London, said in a declaration.

The researchers published their findings in the Vertebrate Paleontology Journal

After analyzing the skull, the researchers found that G. ochoai’s braincase was small, indicating that it had some brain. The researchers hope to discover more specimens of G. ochoai and its relatives in an attempt to understand more about life in ancient Argentina.

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