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The morphological disparity of lophotrochozoan phyla makes it difficult to predict the morphology of the last common ancestor. Only fossils of stem groups can help discover the morphological transitions that occurred along the roots of these phyla. Here, we describe a tubular fossil Yuganotheca elegans gen. et sp. nov. from the Cambrian (Stage 3) Chengjiang… (More)
In the Supplementary Information file originally published with this Article, Pages 3-16 were omitted. These errors have been corrected in the Supplementary Information that now accompanies the Article.