Abstract
The possibility that projecting maxillary canines interfere with either a «rotary chewing» form of molar occlusion or the lateral excursion of the mandible has been used to suggest two dietary (non-weapon) selection models for canine reduction in the earliest male humans. A third model explaining canine reduction is based on the idea that a projecting mandibular canine could interfere with its tip-to-tip occlusion with the maxillary lateral incisor. In this paper, these three mechanical models are critically reexamined in light of more recent studies of occlusion in extant primates, detailed observations of anterior tooth morphology and wear in Miocene to Recent anthropoids, cheek tooth microwear inA. afarensis, and the currently accepted phylogeny and fossil record of the great apes and man.
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References
Andrews P. &Tekkaya I., 1980.A revision of the Turkish Miocene hominoid Sivapithecus meteai. Paleontology, 23: 85–95.
Andrews P. &Tobien H., 1977.A new Miocene locality in Turkey with evidence on the origin of Ramapithecus and Sivapithecus. Nature, 268: 699–701.
Brace C.L., 1967a.The Stages of Human Evolution. Prentice Hall, Englewood Cliffs.
Brace C.L., 1967b.Environment, tooth form, and size in the Pleistocene. Journal of Dental Research, 46: 809–816.
Brues A., 1966.Probable mutation effect and the evolution of hominid teeth and jaws. American Journal of Physical Anthropology, 25: 169–170.
Ciochon R. &Fleagle J., 1987.Primate Evolution and Human Origins. Aldine De Gruyter, New York.
Darwin C., 1871.The Descent of Man. Murray, London.
De Bonis L. &Melentis J., 1977.Les primates hominoides du vallesian de Macedoine (Grece). Geobios, 10: 849–885.
Gantt D.G., 1979.Patterns of dental wear and the role of the canine in Cercopithecinae. American Journal of Physical Anthropology, 51: 353–360.
Gordon K.G., 1982.A study of microwear on chimpanzee molars: Implications for dental microwear analysis. American Journal of Physical Anthropology, 59: 195–216.
Greenfield L.O., 1980.A late divergence hypothesis. American Journal of Physical Anthropology, 52: 351–365.
Greenfield L. O. (in press).Canine «honing» in A. afarensis. American Journal of Physical Anthropology.
Harvey P.H., Kavanaugh M. &Clutton-Brock T.H., 1978.Sexual dimorphism in primate teeth. Journal of Zoology, London, 186: 475–485.
Hiiemae K.M. &Kay R.F., 1972.Trends in the evolution of primate mastication. Nature, 240: 486–487.
Holloway R., 1967.Tools and teeth: some speculations regarding canine reduction. American Anthropologist, 69: 63–67.
Johanson D.C., White T.D. &Coppens Y. 1978.A new species of the genus Australopithecus (Primates: Hominidae) from the Pliocene of eastern Africa. Kirtlandia, 28: 1–14.
Johanson D.C., White T.D. &Coppens Y., 1982.Dental remains from the Hadar Formation. Ethiopia: 1974–1977 collections. American Journal of Physical Anthropology, 57: 545–604.
Jolly C., 1970.The seed eaters; A new model of hominid differentiation based on a baboon analogy. Man, 5: 5–26.
Jungers W.L., 1978.On canine reduction in early hominids. Current Anthropology, 19: 155–156.
Kay C.N., Scapino R.P. &Kay E.D., 1986.A cinephotographic study of the role of the canines in limiting lateral jaw movement in Macaca fascicularis. Journal of Dental Research, 65: 1300–1302.
Kay R.F. 1975.The functional adaptations of primate molar teeth.American Journal of Physical Anthropology, 43:195–216.
Kay R.F., 1981.The nut-crackers — A new theory of the adaptations of the Ramapithecinae. American Journal of Physical Anthropology, 55: 141–151.
Kay R.F. &Hiiemae K.M., 1974.Jaw movement and tooth use in recent and fossil primates. American Journal of Physical Anthropology, 40: 227–256.
Kay R.F., Plavcan J., Glander K. &Wright P., 1988.Sexual selection and canine dimorsphism in New World monkeys. American Journal of Physical Anthropology, 77: 385–397.
Leutenegger W. &Kelley J.T., 1977.Relationship of sexual dimorphism in canine size and body size to social, behavioral, and ecological correlates in anthropoid primates. Primates, 18: 117–136.
Leutenegger W. &Shell B., 1987.Variability and sexual dimorphism in canine size of Australopithecus and extant hominoids. Journal of Human Evolution, 16: 359–367.
Lovejoy C.O., 1981.The origin of man. Science, 211: 341–350.
Mills J.R.E., 1963.Occlusion and malocclusion in primates. Dental Anthropology, D.R. Brothwell, ed. Pergamon, New York. pp. 191–209.
Pilbeam D.R., Meyer G.E., Badgley C., Rose M.D., Pickford M.D., Behrensmeyer A.K. &Shah S.M.I., 1977.New hominoid primates and their bearing on hominoid evolution. Nature, 270: 689–695.
Ryan A.S., 1979.Wear striation direction on primate teeth: A scanning electron microscope examination. American Journal of Physical Anthropology 50: 155–167.
Szalay F.S. &Delson E., 1979.Evolutionary History of the Primates. Academic Press, New York.
Walker A.C., 1984.Mechanisms of honing in the male baboon canine. American Journal of Physical Anthropology, 65: 47–60.
Washburn S.L., 1960.Tools and human evolution. Scientific American, 203: 63–75.
Washburn S.L., 1968.The study of human evolution. Oregon Sate System of Higher Education, Eugene Oregon. 48 pp.
Washburn S.L. &Moore R., 1980.Ape Into Human. Little Brown, Boston.
Wolpoff M.H., 1971.Metric trends in hominid dental evolution. Case Western Reserve Studies in Anthropology, 2: 1–244.
Wolpoff M.H., 1980.Paleoanthropology. Knopf, New York.
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Greenfield, L.O. Canine reduction in early man: A critique of three mechanical models. Hum. Evol. 5, 213–226 (1990). https://doi.org/10.1007/BF02437237
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DOI: https://doi.org/10.1007/BF02437237