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 ofIn Scotland! It is often represented as a plesiosaur, one of the symbolic animals of the era with the which evolved in . Plesiosaurs (also called ) Their wisdom is in the water but in both cases these creatures were not . Furthermore, regarding plesiosaurs, it wasn’t even a matter 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 a growing number of biologists and Consider that the concept of “reptile” is no longer used in the scientific classification of although 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 hunterBritain’s Mary Anning has always been associated with sailors, which indicates that these animals have not adapted to like the environment Hence a lake.
Morocco is a paradise for geologists and paleontologists
This objection was just lifted after the discovery of tiny fossils of plesiosaurs inDeposited by a 100-million-year-old river system, the layers found today in 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 Cenomano-Turonian massif ( Upper) is installed in the northwest by the Anti-Atlas .
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 magazineThe 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 in along with frogs, From From A mythical race of dinosaurs Aquatic animals belonging to an extinct family Spinosauridae : . actually find 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 institutionAuthor of the published article. .
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 asor they are completely adapted to fresh water, as is the case with some dolphins in the Ganges, the Yangtze or even in the Amazon.