Dictionary of Human Evolution and Biology

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Supra-orbital Torus, Tori

Heavy ridge of bone above each orbit that forms a brow ridge in many hominid fossil species. In most of these species the glabella unites the two sides of the brow ridge; in such cases the glabellar torus unites the two superciliary arches into a continuous bar of bone, as in Homo erectus, and is termed the frontal torus. Absence of the glabellar aspect results in a double-arched supra-orbital torus, as in Neandertals. Aka supra-orbital arch or ridge.

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