fœtus de dinosaures

Paleontological study uncovers fetus over 70 million years old

Found in the province of Jiangxi at Ganzhou, the dinosaur egg is ovoid shape. Measuring 16.7 * 7.6 cm, He is part of the family of Elonga eggstoolithidae, laid by oviraptorosaurs. Usually medium in size, their shell has scattered knots. In addition, the dinosaur eggs of this family have two layers: a mammillary layer and an continuous layer.

The dinosaur embryo is nicknamed Baby Yingliang, because it is part from theropod dinosaurss. These have several similarities with birds. After having analyzed the posture dinosaur in its shell, the researchers say the folding behavior is the same in birds.

For your information, dinosaurs non-avian theropods are devoid of Avialae clade. On the other hand, they have a lot of feathers and their limbs are matched with sharp claws. This is also the fundamental reason which justifies the comparison made by paleontologists.

The peculiarities of oviraptorosaurs

First of all, the oviraptorosaurs are the main group of theropod dinosaurs with feathers. Known in the Cretaceous period of North America and Asia, they are closely related to classic birds. Active of their beak and of their size, theropod dinosaurs can be carnivorous, herbivores, even omnivorouss.

Scientists have discovered that the fetus dinosaur had a toothless and deep skull.

“Dinosaur embryos are among the rarest fossils, and most of them are incomplete with disarticulated skeletons. “

Dr Waisum Ma, paleontologist at the University of Birmingham

As a result, the researchers were amazed to see an embryo in an egg in the posture of a bird.

What about the strong points noted on the embryo of the discovered dinosaur?

At the end of the study, scientists came to the conclusion that the head of Baby Yingliang was ventral. In relation to the body, the feet and the back are coiled up along the blunt pole egg. Indeed, oviraptorosaurs had developed avian-type postures. It should be noted that this phenomenon was rather remarkable in birds. modern.

To better understand the central nervous system, paleontologists have had use of various techniquesimagery. As a result, they will be able to actually analyze theanatomy, which includes the bones of the skull and other parts of the body.

“This dinosaur embryo inside its egg is one of the most beautiful fossils I have ever seen. “

Prof. Steve Brusatte, paleontologist at the University of Edinburgh


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