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In this rejoinder to Xiao et al., I will concentrate on two issues: the methodology used by Shen et al. and the assertion that the data supporting the existence of crown-group sponges, cnidarians and stem-group bilaterians, which pre-date the beginning of the Cambrian by at least 40–55 million years, is so weak that it should be dismissed.  相似文献   

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《Current biology : CB》2022,32(8):R358-R359
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