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. 2020 Apr 20;10:6638. doi: 10.1038/s41598-020-63439-0

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© The Author(s) 2020

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Skeletal reconstructions of Spinophorosaurus nigerensis. (A) Original skeletal reconstruction of Spinophorosaurus first published in 2009, modified from the original publication²¹. (B) Virtual skeletal reconstruction of Spinophorosaurus. All the skeletal reconstructions have been scaled to the same dorso-sacral sector length (between the last sacral vertebra and the first dorsal vertebra). Previous reconstruction lacked information on precise sacrum morphology, hence the radically different osteologically induced curvatures of the presacral vertebrae. Other bones which differ between the 2009 reconstruction and actual fossils (as further preparation has been carried out) are the ilium, the first three dorsal ribs, the cervicodorsal transition and the anterior caudal vertebrae.