Fig. 2.

Distal view of a digital model of a chimpanzee lower molar crown with the enamel cap rendered as transparent to reveal the surface of the EDJ (blue). Landmarks used to capture the relative size and positioning of the dentine horns are shown as spheres (red spheres are MAIN landmarks and yellow spheres are RIDGE curve landmarks). A C6 dentine horn can be seen on the distal margin of the molar crown but is purposefully not included in the RIDGE curve landmark set. See text for details. Hyp, hypoconid; Hypd, hypoconulid; En, entoconid.