The plesiosaurs also lived in the rivers with Spinosaurs!

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Do you know “Nessie”? No doubt yes, although it has become less well known in the 21st century.e twentieth century than in XXe. It is of course the famous beast of Loch NessIn Scotland! It is often represented as a plesiosaur, one of the symbolic animals of the era dinosaurs with the pterosaurswhich evolved inair. Plesiosaurs (also called plesiosaurs) Their wisdom is in the water but in both cases these creatures were not dinosaurs. Furthermore, regarding plesiosaurs, it wasn’t even a matter reptiles The classics, as the etymology of the word “plesiosaur” indicates: the term is derived from the Greek Plessiusand “close to” and Soros, “lizard”. Let’s remember to pass that since the advent of classification Evolutiona growing number of biologists and paleontologists Consider that the concept of “reptile” is no longer used in the scientific classification of Oceanalthough the term is still commonly used outside of its scope.

This may have been what the plesiosaur looked like when they were alive. © Julian Johnson Mortimer

Nessie has yet to be discovered, and it certainly couldn’t have been a plesiosaur for at least two reasons. In a photo supposed to show Nessie, her neck looks vertically bent like a swan, but this is a mechanical impossibility of a plesiosaur. Finally, the skeletons of plesiosaurs were first discovered in 1823 by a hunter fossils Britain’s Mary Anning has always been associated with sediment sailors, which indicates that these animals have not adapted tofresh waterlike the environment Lake Hence a lake.

Morocco is a paradise for geologists and paleontologists

This objection was just lifted after the discovery of tiny fossils of plesiosaurs in Layers Deposited by a 100-million-year-old river system, the layers found today in Desert From the Sahara to Morocco, namely in the Kim Kim area. It is a vast semi-desert fringed rocky plateau consisting of a huge crowned slab limestone Cenomano-Turonian massif (chalky Upper) is installed in the northwest by the Anti-Atlas ancient life.

These fossils were found by an international team of researchers from the University of Bath and the University of Portsmouth in the UK, as well as Hassan II University in Morocco.

As explained in a publication in the magazine chalk searchThe fossilized remains of a plesiosaur include adult bones and teeth up to three meters long and the arm bones of a child 1.5 meters long. They suggest that at least one species of plesiosaur can survive well infresh wateralong with frogs, crocodilesFrom turtleFrom Pisces A mythical race of dinosaurs theropods Aquatic animals belonging to an extinct family Spinosauridae : Spinosaurus. actually find fossils Of these animals in Morocco in layers also date back to the Cretaceous period.

Another movement, but with spinosaurs. © Julian Johnson Mortimer

Bones and teeth were found scattered and in different places and not in the form of a skeleton. So every bone and every tooth is a different animal. We have more than ten animals in this group ‘,” Nick Longrich explains in a press release from the University of Bath, an institution paleontologists Author of the published article. His blog provides many details about this discovery.

Study of the teeth shows that they show strong erosion, like those of spinosaurs in the same strata, which means that plesiosaurs ate the same food and especially spent a lot of time in rivers, rather than being occasional visitors.

So it seems that plesiosaurs were able to tolerate both fresh and salt water, like some whales, such as belugaor they are completely adapted to fresh water, as is the case with some dolphins in the Ganges, the Yangtze or even in the Amazon.

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