Named Yuti YuanxiThe newly identified euarthropod species fills an important gap in our understanding of how the arthropod body type emerged and was successful in its time. Cambrian Explosion.
Yuti Yuanxi They lived during the Cambrian period, more than 520 million years ago, when most of the major animal groups known today first evolved.
This species is ArthropodsThis includes modern insects, spiders, and crabs.
It is about the size of a poppy seed, Yuti Yuanxi The organs are well preserved and of excellent quality.
Durham University paleontologist Martin Smith and his colleagues used the advanced scanning technique of synchrotron X-ray tomography to find the Yuti YuanxiThey have found a tiny brain region, digestive glands, a primitive circulatory system, and even traces of the nerves that control the larva's simple legs and eyes.
“When I was daydreaming about the fossils I would most like to find, I always thought about arthropod larvae, because developmental data are so important to understanding their evolution,” Dr. Smith said.
“But because the larvae are so tiny and fragile, I thought the chances of finding a fossilized version were virtually zero.”
“I already knew this simple, worm-like fossil was something special, but when I saw the incredible structures preserved under the skin, my jaw just dropped. How could these complex features have survived decay and still be here after 500 million years?”
“It's always fascinating to see the inside of a sample using 3D imaging, but this incredibly tiny larva has achieved near-perfect preservation through natural fossilisation,” said Dr Katherine Dobson, a palaeontologist at the University of Strathclyde.
“Studying this ancient larva provides important clues about the evolutionary steps required to transform a simple worm-like organism into a sophisticated arthropod body form with specialized limbs, eyes and a brain.”
“For example, the fossil reveals an ancestral 'protocerebral' brain region that would later form the segmented and specialized arthropod head nucleus with its various appendages, including antennae, mouthparts and eyes.”
“This complex head enabled arthropods to adopt a wide range of lifestyles and become the dominant organisms in the Cambrian oceans.”
“These details also help us trace how modern arthropods acquired their incredible anatomical complexity and diversity, making them the most abundant animal group today.”
of Investigation result Published in the journal Nature.
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Mr. Smith othersThe organ system of a Cambrian euarthropod larva. NaturePublished online July 31, 2024, doi: 10.1038/s41586-024-07756-8
Source: www.sci.news
