Our Earth is fraught with many puzzles thatyet to be solved. Recently, paleontologists from universities in Alberta and Yale discovered the remains of amazing crabs that lived about 90 million years ago, along with dinosaurs. The find turned out to be unique and amazing - judging by the fossils, the ancient crabs had signs of both larvae and adults, and at the same time were similar to other crustaceans. The discovery led scientists to reconsider the definition of what makes crabs - crabs.
A new species of ancient crabs got the nameCallichimaera perplexa, which can be translated as "puzzling beautiful chimeras." They were very tiny creatures about 1.6 centimeters long and lived on the territory of the modern USA and Canada. According to the paleontologist Xavier Luke, it is surprising that, despite its tiny size, the ancient creatures remained in such good condition.
The good state of the fossils allowed scientistsrecreate the look of the ancient crabs. Their main feature was large and bulging eyes - this means that they retained "childish" signs even in adulthood. The assimilation of adults to larvae in science is known as pedomorphosis, and such a phenomenon can be seen in such modern animals as the axolotl, whose cute photos have long been discussed in social networks.
The huge eyes of the ancient crabs were not protected by anything, but scientists are confident that they were functional and helped the animals to hunt prey and avoid predators.
We think that this animal freely swam in the water column. Maybe it moved during the day and hunted only in the dark time, ”explained Xavier Luke.
For swimming crabs used lobed-shapedlimbs, which is not typical for them. In ancient times, such limbs were found only in sea scorpions, which became extinct 250 million years ago.
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