Extended Data Fig. 1: Comparison of the zygomaxillary border and the zygomaxillary tubercle.

Frontal view of the virtual reconstruction of a) ATE7-1, b) D2282, c) D2700, d) ATD6−69, e) D4500, f) Sangiran 17 and g) ATD6−58. White arrow points to the zygomaxillary border which is curved in H. antecessor (d,g) and straight in the rest of the specimens, including ATE7-1. Red arrow points to the presence of a zygomaxillary tubercle in ATD6−69 and ATD6-58, a feature that seems to be absent in ATE7−1 and in the Early Pleistocene specimens from Dmanisi and Sangiran portrayed for comparison.