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Topographic thickness variation is rendered by a pseudo-colour scale ranging from thinner (dark-blue) to thicker (red). NAH = North African Homo from Tighenif (Tighenif2), NEA = Neanderthal (La Chaise de Vouthon S43) and MH = modern human of European origin (o = occlusal, b = buccal). Scale bar = 1.91 for all specimens.
