Figure 2. A in Macroevolutionary trends of brain mass in Primates

Figure 2. A, Primate phylogeny. The colour gradient associated with the branches represents estimated rates of endocranial volume evolution. B, absolute rates of individual branches of the hominin clade collated in increasing rate value (green bars), and contrasted with the average rate computed over the rest of the tree branches (vertical red line). Bars without names correspond to internal nodes. The image was generated by using the R package ggplot (http://ggplot2.org/) and our own R codes. Animal silhouettes were available under Public Domain licence at phylopic (http://phylopic.org/), unless otherwise indicated. Specifically, Homo sapiens (http://phylopic.org/image/c089caae-43ef-4e4ebf26-973dd4cb65c5/); Cebus (http://phylopic.org/image/156b515d-f25c-4497-b15b-5afb832cc70c/), available for reuse under the Creative Commons Attribution 3.0 Unported (https://creativecommons.org/licenses/by/3.0/) image by Sarah Werning; Tarsius (http://phylopic. org/image/f598fb39-facf-43ea-a576-1861304b2fe4/); lemuriformes (http://phylopic.org/image/eefe8b60-9a26-46ed-a144- 67f4ac885267/), available for reuse under Attribution-ShareAlike 3.0 Unported (https://creativecommons.org/licenses/ by-sa/3.0/) image by Smokeybjb; Plesiadapis (http://phylopic.org/image/b6ff5568-0712-4b15-a1fd-22b289af904d/), available for reuse under Attribution-ShareAlike 3.0 Unported (https://creativecommons.org/licenses/by-sa/3.0/) image by Nobu Tamura (modified by Michael Keesey).