This is observed in some birds, but was first detected in reptiles.
Scientists have managed to find a fossilized dinosaur egg, which was hidden inside the egg. This phenomenon is known as ovum-in-ovo, it is sometimes found in birds such as chickens, but it was first found in dinosaurs and reptiles in general, according to IFL science.
talk about the morphology of their oviduct, which was probably more similar to modern birds, adapted to the successive laying of eggs. Probably, these dinosaurs could also lay egg after egg.
A “rare and important find” was made in the Lamet formation in India, which dates back to the Upper Cretaceous. The egg was discovered in the National Park of Dinosaur Fossils of Bug, where they found 52 nests of sauropods.
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One of these nests contained 10 eggs, including the “egg in the egg”, which scientists have found had two shells. The significance of this finding lies in the fact that it can tell about the reproductive strategy of these dinosaurs and the structure of related organs.
morphology of birds' oviducts, which opens the possibility for successive egg-laying in this group of sauropod dinosaurs “, – the authors of the study concluded.
According to scientists, the discovery emphasizes that this phenomenon is not unique to birds, but reproductive behavior sauropods was similar to other archosaurs. In addition, the finding suggests that sauropods had more in common with birds and crocodiles than with non-archosaurus reptiles, making the finding invaluable to evolutionary biology.
However, scientists insist that Further research into an unusual egg.
Earlier, in the Ganzhou district of southern China, scientists discovered a perfectly preserved dinosaur embryo that was preparing to hatch from an egg like a chicken. Researchers estimate that age embryo is at least 66 million.
