Journal of Micropalaeontology
Journal of Micropalaeontology
JM
Articles | Volume 45, issue 1
Articles | Volume 45, issue 1
https://doi.org/10.5194/jm-45-455-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/jm-45-455-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 45, issue 1
Research article
 | 
05 Jun 2026
Research article |  | 05 Jun 2026

Cuticular microfragments from the lower Cambrian Yanjiahe Formation, China: insights into ecdysozoan biodiversity at the dawn of animal radiation

Lei Zhang, Fan Zhai, Ying Wu, Shan Chang, Yan Ye, Xianguo Lang, Yanchun Pang, Liang Hu, Qinglai Feng, Marie-Béatrice Forel, Taniel Danelian, Yuanyuan Yong, and Jean Vannier

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Short summary
New 535-million-year-old fossils from China reveal early animal diversity. Preserved in fine detail, these fossils showcase Ecdysozoa – ancestors of insects and crabs. Twelve forms with spines, plates, and possible limbs were identified, showing rapid body plan evolution after life's first complexity boom. Analysis of fossilized skins reveal complex ecosystems emerging at this time. The findings provide clues about how Earth's most successful animal groups began their evolutionary journey.
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