Z. Zhang
New reconstruction of the Wiwaxia scleritome, with data from Chengjiang juveniles
Zhang, Z.; Smith, M.R.; Shu, D.
Abstract
Wiwaxiids are a problematic group of scale-covered lophotrochozoans known from Cambrian Stages 3–5. Their imbricating dorsal scleritome of leaf-like scales has prompted comparison with various annelids and molluscs, and has been used as a template to reconstruct the articulation pattern of isolated Small Shelly Fossils. The first articulated specimens of Wiwaxia from the Cambrian Stage 3 Chengjiang Konservat-Lagerstätte show that the Wiwaxia scleritome comprised nine equivalent transverse rows associated with outgrowths of soft tissue, but did not possess a separate zone of anterior sclerites. This serial construction is fundamentally incompatible with the circumferential disposition of sclerites in early molluscs, but does closely resemble the armature of certain annelids. A deep homology with the annelid scleritome must be reconciled with Wiwaxia’s mollusc-like mouthparts and foot; together these point to a deep phylogenetic position, close to the common ancestor of annelids and molluscs.
Citation
Zhang, Z., Smith, M., & Shu, D. (2015). New reconstruction of the Wiwaxia scleritome, with data from Chengjiang juveniles. Scientific Reports, 5, Article 14810. https://doi.org/10.1038/srep14810
Journal Article Type | Article |
---|---|
Acceptance Date | Sep 9, 2015 |
Publication Date | Oct 7, 2015 |
Deposit Date | Oct 7, 2015 |
Publicly Available Date | Mar 28, 2024 |
Journal | Scientific Reports |
Publisher | Nature Research |
Peer Reviewed | Peer Reviewed |
Volume | 5 |
Article Number | 14810 |
DOI | https://doi.org/10.1038/srep14810 |
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This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
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