Researchers have discovered a species of toothless, two-fingered dinosaur which lived more than 68 million years ago.

Multiple complete skeletons of the new species, named Oksoko avarsan, were unearthed in the Gobi Desert in Mongolia by a University of Edinburgh-led team.

The feathered, omnivorous creatures grew to around two metres long with only two functional digits on each forearm, and also had a large, toothless beak similar to the type seen in parrots today.

Researchers said the remarkably well-preserved fossils provided the first evidence of digit loss in the three-fingered family of dinosaurs known as oviraptors.

The discovery that they could evolve forelimb adaptations suggests the group could alter their diets and lifestyles, and enabled them to diversify and multiply, the team says.

Dr Gregory Funston, of the University of Edinburgh’s School of GeoSciences, who led the study, said: “Oksoko avarsan is interesting because the skeletons are very complete and the way they were preserved resting together shows that juveniles roamed together in groups.

“But more importantly, its two-fingered hand prompted us to look at the way the hand and forelimb changed throughout the evolution of oviraptors, which hadn’t been studied before.

This revealed some unexpected trends that are a key piece in the puzzle of why oviraptors were so diverse before the extinction that killed the dinosaurs.

Researchers studied the reduction in size, and eventual loss, of a third finger across the oviraptors’ evolutionary history.

The creatures’ arms and hands changed drastically in tandem with migrations to new geographic areas, specifically to what is now North America and the Gobi Desert.

The team also discovered that Oksoko avarsan, like many other prehistoric species, were social as juveniles.

The study, published in the journal Royal Society Open Science, was funded by The Royal Society and the Natural Sciences and Engineering Council of Canada.

It also involved researchers from the University of Alberta and Philip J. Currie Dinosaur Museum in Canada, Hokkaido University in Japan, and the Mongolian Academy of Sciences.

Source: https://www.cambridge-news.co.uk/news/uk-world-news/scientists-discover-species-two-fingered-19059760

Dinosaur, Species, Gobi Desert, Parrots, Paleontology

World news – GB – Species of toothless, two-fingered dinosaur discovered by researchers

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