Information about samples used in this study.

1, NMK: National Museum of Kenya; AMNH: American Museum of Natural History; GMU: Gadja Mada University; NME: National Museum of Ethiopia; NHM: Natural History Museum (London); MH: Musee de l'Homme; PM: Peabody Museum (Harvard University); IPH: Institut de Paleontologie Humaine; UCT: University of Cape Town; DC: Duckworth Collection (Cambridge University); NMB: Naturhistorisches Museum Basel; MM: Mutter Museum (Philadelphia); TAU: Tel Aviv University; MLU: Meckelsche Sammlungen, Martin-Luther Universität of Halle-Wittenberg, scanned at the Paleoanthropology High Resolution Tomography Laboratory, University of Tübingen; UM: University of Michigan; UV: University of Vienna; WU: Washington University; INCA: Indonesian National Center for Archaeology.2, ME: myxoedematous endemic.