ArticleProceedings of the National Academy of Sciences of the United States of America2026
Polychaete annelids from the earliest Cambrian Period.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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1 citing paper in PubMed.
- Polychaete annelids from the earliest Cambrian Period.Proceedings of the National Academy of Sciences of the United States of America · 2026Article
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6 authors.
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Abstract
Unambiguous body fossils of annelids (ringed worms) first appear in the Cambrian Period but are so far known exclusively as flattened specimens preserved in Burgess Shale-type Lagerstätten. Here, we report phosphatized microfossils, interpreted as polychaete annelids, from a distinct taphonomic window (i.e., three-dimensional Orsten-type preservation) in the earliest Cambrian (early Fortunian Age, ca. 535 Ma) Zhangjiagou Lagerstätte of South China. The fossils are millimetric in length and preserved as three-dimensional endocasts of the body. They exhibit clear trunk segmentation, with each segment bearing a pair of lateral or ventrolateral outgrowths. Two species,
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