“…Observed traits include: shape of the nasal aperture, root, spine, bridge, and sill (42, 62, 83–87); shape of the orbit and interorbital breadth (83, 85,86); angle of the midfacial profile and zygomatics (42); shape of the zygomaticomaxillary suture (83, 85,86); presence or absence of zygomatic tubercles, inion hook, wormian bones, postbregmatic depression, and canine fossa (42, 62, 83, 86); shape of the cranial vault and presence and complexity of its sutures (42, 86); palate shape and complexity of its sutures (83, 85,86); and shape of the mandible border, rami, and gonial angles (86, 88). Dental traits can also be indicative of ancestry, including the presence or absence of Carabelli's cusp, crenulated molars, and shoveled incisors (86, 89,90). Many of these nonmetric traits are expressions of evolutionary adaptations to differing climates, making it possible to categorize expressions into broad geographically-based ancestry groups.…”