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. 2017 Mar 1;8:14576. doi: 10.1038/ncomms14576

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Copyright © 2017, The Author(s)

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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Coloured areas represent different specimens and black ones are approximated from equivocal data. Skeleton predominantly reconstructed from STM-118 and its scale is 5 cm. The inset specimen images have different scales: in STM-127, 132, 147 and 144CS it is 2 cm, in STM-118 it is 3 cm, in STM-144 it is 4 cm and in STM-114 it is 10 cm. See Methods.