The first edrioasteroid echinoderm from the lower Cambrian Chengjiang biota of Yunnan Province, China
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07/07/2022
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2022-01-21
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echinoderm
edrioasteroid
Cambrian
Chengjiang
biota
South China
edrioasteroid
Cambrian
Chengjiang
biota
South China
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Abstract
Until now, the earliest fossil echinoderms have been predominantly known from the early Cambrian of Laurentia and West Gondwana. Here, we describe Sprinkleoglobus extenuatusgen. et sp. nov. from the Chengjiang biota (Cambrian Series 2, Stage 3) of Yunnan Province, China. The over-all profile of the theca and the morphology of the ambulacra clearly establish it as an edrioasteroid echinoderm. This represents the first discovery of an unequivocal echinoderm from the early part of the Cambrian of South China and is among the oldest records of echinoderms globally. Our material shows that edrioasteroids were diverse and widely distributed from their first occurrence in the fossil record, suggesting an earlier origin for the group. We infer that Sprinkleoglobus and other early echinoderms were adapted for attaching to hard substrates, implying that the so-called Cambrian substrate revolution was not a strong control on the early evolution of attachment in echinoderms.
Citation
Zhao, J., Rahman, I.A., Zamora, S., Chen, A. and Cong, P. (2022), The first edrioasteroid echinoderm from the lower Cambrian Chengjiang biota of Yunnan Province, China. Pap Palaeontol, 8: e1465. https://doi.org/10.1002/spp2.1465
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Copyright: © 2022 The Authors. Papers in Palaeontology published by John Wiley & Sons Ltd on behalf of The Palaeontological Association.
This is an open access article under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
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2056-2799
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2056-2802