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Biology

The Mongolian fossil is the earliest known species of streamlined non-avian theropod dinosaur to move on two legs.

A group of scientists from Seoul Public College, the College of Alberta, and the Mongolian Institute of Sciences has recognized the main known illustration of a smoothed-out, non-avian theropod dinosaur strolling on two legs. The group depicts where the fossil was discovered, its condition, and elements that were used to help identify it as another dinosaur species in their paper published in Correspondences Science.

The dinosaur was exhumed at the Hermiin Tsav fossil arrangement in Mongolia back in 2008 as a feature of the Korean-Mongolian Global Dinosaur Endeavor. It has been away with many different fossils since then, anticipating concentration by specialists.

In their investigation of the fossil, the analysts viewed it as very much saved and almost complete—iit had the majority of its two hindlimbs, one of its forelimbs, a large portion of its skull, and the greater part of its spinal segment. It also had a significant number of teeth.The analysts noticed that the skeleton was comparable in shape to numerous advanced water birds: smooth and trim, suggesting it lived on or close to the water and made its living by fishing seaward.

The analysts likewise noticed that its ribs highlighted its tail, one more typical element of waterbirds. Yet it was not aviane there was no indication of wings. The scientists likewise noticed that the general state of the skeleton suggested firmly that it didn’t involve its forelimbs for strolling, logically giving it a penguin-like step.

Their discoveries propose the dinosaur had a place with the therapod family and had not been recognized previously; hence, it addressed newfound animal types. They named it Natovenator polydontus, which generally means “tracker that swims and has a ton of teeth.” They believe it most closely resembled Halszkaraptor, another non-avian dinosaur that lived in what is now Mongolia.

The dinosaur was found in a stone development dating from the Upper Cretaceous, which places it about 100 million years ago. The scientists believe it was adapted to a semiaquatic lifestyle similar to that of modern water birds, but its large number of teeth suggests it had a more varied diet. 

More information: Sungjin Lee et al, A non-avian dinosaur with a streamlined body exhibits potential adaptations for swimming, Communications Biology (2022). DOI: 10.1038/s42003-022-04119-9

Journal information: Communications Biology 

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