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. 2018 Mar 6;19:185. doi: 10.1186/s12864-018-4569-1

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© The Author(s). 2018

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided 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 Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 2 — Phylogenetic tree that was used for selection analyses and showing branches on which there was evidence of selection: branches a, b, c, d, e, and f (bold lines) were found to have highly significant values of ω (non-synonymous: synonymous ratios), provided as branch labels. Altitudes of capture sites are given on the left of dashed lines, while the altitudinal ranges that have been described for the oviparous species are given on the right of these lines. References for these descriptions are denoted as *unpublished personal observation, ^a [51], ^b [52], ^c [53], ^d [54], ^e [55]