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. 2018 Jan 24;8:1523. doi: 10.1038/s41598-017-18805-w

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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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Chronogram of streptophytes, green algae, photosynthetic euglenophytes, the “green” dinoflagellate Lepidodinium chlorophorum, and chlorarachniophytes. Node ages were inferred using Bayesian inference assuming a relaxed molecular clock and a set of node age constraints derived from the fossil record as well as node age estimates from previous studies (see Supporting Information File 1). Values at nodes indicate average node ages and grey bars at selected nodes represent 95% confidence intervals. Coloured vertical bars to the right of the phylogeny are labelled: S, Streptophyta; P, prasinophytes; CC, core Chlorophyta. “S/C split” = divergence of the Streptophyta and Chlorophyta. “CC split” = divergence of the prasinophytes and core Chlorophyta. Timeline abbreviations: Camb., Cambrian; Ord., Ordovician; Sil., Silurian; Dev., Devonian; Carb., Carboniferous; Perm., Permian; Tri., Triassic; Jur., Jurassic.