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Chinese-led team uncovers oldest known body fossils of ringed worms_蜘蛛资讯网

worms and sipunculans dated to about 518 million years ago.The newly identified fossils are only a few millimeters long but display clear segmentation along their bodies, a defining characteristic of

truct. Prior to this discovery, the oldest confirmed annelid body fossils were bristle worms and sipunculans dated to about 518 million years ago.The newly identified fossils are only a few millimeter

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