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How could he survive at sea if his kidneys could not process the salt?
In 2016, the remains of a new species was discovered, which was named after Ichthyosaurus larkini, which lived about two hundred million years ago, during the Jurassic. It is a type of reptile that was originally terrestrial, worse than little by little it was adapted to the terrestrial environment. Its appearance could be similar to that of the current Dolphins, but they were ferocious predators that could measure up to 15 meters long.
When they hunted their prey at sea, the Ichthyosaurus larkini swallowed large quantities of salt water. Studies on the fossil remains found have revealed that the size of the kidneys of these creatures was too small to process and eliminate all that amount of salt. How did they then survive in the sea?
The answer to this puzzle has been found by a researcher at the Earth Sciences Department at The College, in the state of New York. When examining the skull of one of these animals, he discovered in the bones of the external nose the remains of a strange structure that could be glands to screen the salt.
Many marine animals, including sharks, have these glands. In the chaos of the sharks, they are located in the rectum. Thanks to them you can remove the excess salt ingested by the animal. But, to date, there was no evidence that prehistoric reptiles such as the Ichthyosaurus larkini also possessed them.