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. 2021 May 16;21:86. doi: 10.1186/s12862-021-01821-w

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© The Author(s) 2021

Open AccessThis 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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/. 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 in a credit line to the data.

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Fig. 1 — A Multi-locus squamate phylogeny [39] trimmed to show species in this study. Species names are colored by substrate. The data matrix shows number of limbs, number of digits, jugal condition, and condition of the upper temporal fenestrae, with boxes color-coded to indicate character state. Apposition refers to the closure of the upper temporal fenestrae through close contact of the squamosal with the parietal. Photos: B Acontias litoralis, C Typhlacontias brevipes, and D Sepsina angolensis.

Credit to Johan Marais (B and C) and Luis M. P. Ceríaco (D)