Fossil discovery reveals complex ecosystems existed on Earth much earlier than previously thought mcgillu sciencemagazine
"The fossils of the Guizhou region reveal an ocean ecosystem with diverse species making up a complex food chain that includes plant life, boney fish, ray-finned fish, crabs, lobsters, shrimp, and mollusks. In all, our team discovered 12 classes of organisms and even found fossilized feces, revealing clues about the diets of these ancient animals," says Morgann Perrot, a former postdoctoral researcher at McGill University, now at Université du Québec à Montréal.
Field photo of a Coelacanth fish fossil from the Gujiao section. / Photo de terrain d'un fossile de poisson cœlacanthe . Credit: Xu Dai Rocks from the Guizhou region, deposited at the bottom of an ancient ocean during the Permian-Triassic transition and containing the newly discovered fossils . Credit: Xu DaiPreviously, it was thought that complex ecosystem would need 5 to 10 million years to evolve after an extinction.
Xu Dai et al, A Mesozoic fossil lagerstätte from 250.8 million years ago showing a modern-type marine ecosystem,
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