518 million years old soft tissues found in China

Scientists have discovered a “stunning” trove of thousands of fossils on a river bank in China.

The fossils, estimated to be about 518 million years old,are particularly unusual because the soft body tissue of many creatures,including their skin, eyes and internal organs, have been”exquisitely” well preserved, the BBC reported.

   

Palaeontologists have called the findings”mind-blowing” — especially because more than half of the fossilsare of previously undiscovered species. The fossils, known as the Qingjiangbiota, were found near Danshui river in Hubei province.

More than 20,000 specimens have been collected and 4,351analysed so far, including worms, jellyfish, sea anemones and algae.

They will become a “very important source in the studyof the early origins of creatures”, Professor Xingliang Zhang from China’sNorthwest University said. He is one of the fieldwork leaders.

The discovery is particularly remarkable because “themajority of creatures are soft-bodied organisms, like jellyfish and worms,which normally stand no chance of getting fossilised”, Prof Robert Gaines,a geologist who also took part in the study, said.

The majority of fossils tend to be of hard-bodied animals,as harder substances, like bones, are more likely to fossilised.

The Qingjiang biota must have been “rapidly buried insediment” due to a storm leading to preservation of soft tissues, he said.

Scientists are especially excited by the jellyfish and seaanemone fossils, which Prof Gaines describes as “unlike anything I haveever seen. Their sheer abundance and their diversity of forms isstunning”.

Meanwhile, palaeontologist Allison Daley, not part of thestudy but wrote an accompanying analysis in Science, said the find was one ofthe most significant in the last 100 years.

“It blew my mind — as a palaeontologist I neverthought I’d get to witness the discovery of such an incredible site. For thefirst time we’re seeing preservation of jellyfish — [when] you think ofjellyfish today, they’re so soft-bodied, so delicate, but they’re preservedunbelievably well at this site,” Daley said.

The research team is now documenting the remaining specimensand conducting more drilling in the region to find out more about the ancientlocal ecosystem, and the fossilisation process.

Prof Xingliang says he looks forward to studying “allthese new species — I’m always excited when we get something new”.

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