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Journal of Paleontology 92(1):1–2
some sclerites of Microdictyon fromthe southernmargin ofNorth China (Pan et al., 2017), herald a rapid generic diversification and ecological expansion of ecdysozoans (priapulids, lobopodians, and arthropods). Skovsted and Topper (2017) provide insight into the enigmatic tubular fossils of mobergellans from the early Cambrian (Stage 4?) of Greenland and Labrador and address the contradictory issues on the muscle scars and their functional morphology. The presence of enigmatic eldonioids with asso- ciated trace fossils is documented by Schroeder et al. (2017) from the lower Cambrian Emu Bay Shale Konservat-Lagerstätte of South Australia, providing the first record of the group for the Cambrian of East Gondwana. After early Cambrian Stage 4, exceptionally preserved biotas
generally become less abundant, butLiu et al. (2017) describe new three-dimensional phosphatized cycloneuralians from the Paibian of South China. A detailed investigation by Pates et al. (2017) of hurdiid specimens from the Spence Shale Member, Langston Formation, and the Wheeler and Marjum formations of Utah greatly expands knowledge of Laurentian hurdiids, extending the range of the group above and belowthe Burgess Shale, which has implications for paleogeographic and temporal analyses of hurdiid distribution. The 11 papers presented in this special issue focus on a
wide range of themes that collectively address important evo- lutionary and ecological aspects of the Cambrian radiation, the greatest animal radiation event in the history of life.
Acknowledgments
The guest editors sincerely thank all the authors for their valu- able contributions to this special issue. We also express our sincere thanks to JP senior editors, J. Jin and B. Hunda, along with the entire editorial support team, for their help in bringing this volume to fruition. Thanks also to all the referees who made time in their schedules to provide insightful reviews of sub- mitted manuscripts. We are also grateful to the Journal of Paleontology for accepting our original idea for publishing this special issue. ZFZ acknowledges the long-term financial sup- ports from National Natural Science Foundation of China (41425008, 41720104002, 41621003) and Overseas Expertise Introduction Centre for Discipline Innovation (111 Center: D17013). GAB was supported during his recent visits to China by a Chinese Academy of Sciences President’s International Fellowship Initiative (PIFI) and a Visiting Professorship (5 years) at Northwest University.
References
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Accepted 8 October 2017
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