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Nature 402, 518-522 (2 December 1999) | doi:10.1038/990080;
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An early Cambrian craniate-like chordate
Since the identification of the Lower Cambrian Yunnanozoon as a chordate in 1995 (ref. 1), large numbers of complete specimens of soft-bodied chordates from the Lower Cambrian Maotianshan Shale in central Yunnan (southern China) have been recovered.
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