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. 2018 May 18;8:7841. doi: 10.1038/s41598-018-26094-0

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© The Author(s) 2018

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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Top left, Principal Component Analysis of the Raw Data dataset (see text) with superimposed phylogeny. Top right, shape variation of the bony labyrinth on the PCA morphospace. Bottom left, Canonical Variate Analysis of the Raw Data dataset, colors are environmental categories as indicated on the legend. Bottom right, shape variation of the bony labyrinth on the CVA morphospace. Electronic supplementary material 6 completes the results with the sliding protocols and for the subsets analysed (semi-circular canals and cochlea) and Supplementary data 6 gives the results of the geometric morphometric analyses.