Abstract
THE arrangement of teeth in the lower jaw of man (Hominidae) may be distinguished from that of apes (Pongidae) by means of the “basic rectangle of the mandible”1. Leakey defined the rectangle and suggested that, in the Pongidae, the sides “are nearly twice as long as the upper and lower ends”; whereas in the Hominidae “the basic rectangle is seen to be nearly a square”1. Leakey presented several illustrative diagrams but he did not otherwise quantify his measurements.
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References
Leakey, L. S. B., Nature, 217, 827 (1968).
Napier, J. R., and Napier, P. H., A Handbook of Living Primates (Academic Press, London, 1967).
Gregory, W. K., The Origin and Evolution of the Human Dentition (Williams and Wilkins, Baltimore, 1922).
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Pilbeam, D. R., Nature, 219, 1335 (1968).
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Simons, E. L., and Chopra, S. R. K., Proc. Intern. Cong. Primat., 2, 135 (Karger, Basel, 1969).
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KINZEY, W. Basic Rectangle of the Mandible. Nature 228, 289–290 (1970). https://doi.org/10.1038/228289a0
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DOI: https://doi.org/10.1038/228289a0
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