{"id":571,"date":"2026-04-03T23:45:00","date_gmt":"2026-04-03T23:45:00","guid":{"rendered":"https:\/\/golliza.com\/?p=571"},"modified":"2026-04-03T23:45:00","modified_gmt":"2026-04-03T23:45:00","slug":"chinese-fossils-trace-animal-origins-back-millions-of-years-greekreporter-com","status":"publish","type":"post","link":"https:\/\/golliza.com\/?p=571","title":{"rendered":"Chinese fossils trace animal origins back millions of years – GreekReporter.com"},"content":{"rendered":"

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Fossil of Archiaspinus, a member of the Ediacaran biota. Credit: Masahiro Miyasaka \/ Wikimedia Commons \/ CC BY-SA 4.0<\/figcaption><\/figure>\n

Newly discovered fossil remains in southwestern China are pushing back the known origins of animals and providing new insights into how complex life first arose on Earth.<\/p>\n

Researchers say these fossils show that many major animal groups evolved earlier than previously believed, before the start of the Cambrian period. This finding suggests that the emergence of complex animals was more gradual than the sudden explosion that accompanied early evolution.<\/p>\n

The research was led by scientists from Oxford University Museum of Natural History, Oxford University School of Earth Sciences and Yunnan University. It was published in Science magazine.<\/p>\n

older origins of animal life<\/h2>\n

For decades, scientists believed that complex animals emerged during the Cambrian explosion about 535 million years ago. However, new fossils show that this process already began at the end of the Ediacaran period.<\/p>\n

The fossils are between 554 and 539 million years old, pushing back the history of animal diversification by at least 4 million years. Lead author Gaorong Li said the discovery fills a major gap in the fossil record and confirms that complex animals existed earlier than previously proven.<\/p>\n

Ecosystem changes recorded in fossils<\/h2>\n

The fossils were discovered in the Jiangchuan biota in Yunnan province, where researchers recovered more than 700 specimens.<\/p>\n

Scientists said the site captures an ecosystem in transition. This includes both simple Ediacaran organisms and early forms of animals related to modern groups. Co-author Frankie Dunn said the fossils show a transition from organisms that lived on the flat ocean floor to organisms that moved underwater and actively fed.<\/p>\n

Early ancestor of modern animals identified<\/h2>\n

Among the most important discoveries were early members of the deuterostomes, which later gave rise to vertebrates such as humans and fish. These fossils are the oldest known relatives of this group.<\/p>\n

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#fossil<\/a> People from southwest China are rewriting their life stories #Earth<\/a>.<\/p>\n

More than 700 specimens show that complex animals existed millions of years earlier than thought, before the Cambrian explosion.<\/p>\n

Major changes in evolution have been postponed. pic.twitter.com\/mJDBGXbddB<\/a><\/p>\n

\u2014 Tom Marvolo Riddle (@tom_riddle2025) April 3, 2026<\/a><\/p>\n<\/blockquote>\n

The researchers also identified an early ancestor of modern starfish and acorn insects, which is part of the Umbracularia family. It is thought that these creatures were attached to the ocean floor and used their tentacles to capture food.<\/p>\n

Other fossils included insect-like bilateral animals and perhaps early comb jellies. Many specimens exhibited unusual features not seen in known species from the Ediacaran or Cambrian periods.<\/p>\n

Co-author Luke Parry said the fossils reveal important evolutionary transitions linking strange early life forms to the animals we recognize today.<\/p>\n

Fossils help resolve long-standing controversy<\/h2>\n

The discovery helps address a long-standing question in evolutionary biology. Genetic research suggests that groups of animals evolved faster than fossil evidence suggests, leading to the debate between “rocks” and “clocks.”<\/p>\n

Researchers say the new fossils bring these lines of evidence into closer alignment by providing direct evidence of early, complex life.<\/p>\n

Emily Mitchell from the University of Cambridge, who was not involved in the study, said the discovery supports the idea that there must have been a transition period before the Cambrian.<\/p>\n

Good preservation reveals hidden details<\/h2>\n

The fossil is preserved as a carbon-rich membrane, unlike most Ediacaran fossils, which appear as surface traces. This rare type of preservation allows scientists to observe anatomical details.<\/p>\n

This state of preservation is similar to that seen in Canada’s Burgess Shale, one of the most important fossil remains of the Cambrian period.<\/p>\n

Co-author Ross Anderson said the lack of similar fossils at other sites may be due to differences in preservation rather than the actual absence of fossils.<\/p>\n

Years of fieldwork led to breakthroughs<\/h2>\n

The fossil was discovered by a Yunnan University team led by Peiyun Cong and Fan Wei after nearly 10 years of research.<\/p>\n

Previous research in eastern Yunnan had only found fossilized algae. Researchers said they eventually found a place where animal remains were preserved along with plants.<\/p>\n

Professor Feng Tan, from the Chinese Academy of Geological Sciences, said the fossils show strong evidence for the existence of a diverse bilateral race at the end of the Ediacaran period.<\/p>\n

Researchers say the discovery reconstructs the timeline of early animal evolution and raises new questions about how complex life first arose.<\/p>\n

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