Scientists from the University of Arizona carried out the first detailed analysis of the structure cardiodication participation, a worm-like animal whose fossils contain the oldest brain known to science. The research was published in the journal Science.
cardiodication participation – A sea creature less than 1.5 centimeters long that lived more than half a billion years ago on the rocks of southern China’s Yunnan province. The fossil was first discovered in 1984. It is believed that the brain cannot be petrified, but in case cardiodiction this happened by allowing scientists to study the nervous system of the ancient animal. However, no one had ever thought of searching the brain of such a small creature before.
The authors of the new study didn’t just describe the brain cardiodiction, but also compared it with the brains of known fossils and living arthropods, including spiders and centipedes. Scientists have concluded that the general plan of brain organization has been preserved from the Cambrian to the present day.
But there’s another surprise: The heads and brains of modern arthropods and some of their fossilized ancestors were still thought to be compartmentalized. cardiodiction He had a segmented body, but there are no signs of fragmentation in the head and brain. This suggests that the nervous system of the brain and trunk probably developed separately.
According to the authors, the discovery resolves a long and heated debate about the origin and structure of the head in arthropods, the most species-rich group of animals. Arthropods include insects, crustaceans, spiders and other arachnids and centipedes. Lobopods – a group that includes cardiodiction, may be the oldest arthropods. Scientists’ discovery may require rewriting entire biology textbooks.
Source: Gazeta
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