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Racial characters in human dentition; Part I, A racial distribution of the Dryopithecus pattern and its modifications in the lower molar teeth of man

, : Racial characters in human dentition; Part I, A racial distribution of the Dryopithecus pattern and its modifications in the lower molar teeth of man. Proceedings of the American Philosophical Society, 67: 157-174

Even with the widest range of variation the pattern of the lower molar teeth may be traced to a fundamental type named by Gregory the "Dryopithecus pattern." This pattern is recognized by a distinct number of cusps which must be accompanied by a definite system of grooves. Certain evolutionary changes appear tending to modify the fundamental pattern and occur in well-defined stages depending upon the modification of the system of furrows, the reduction in number of the main cusps, or both. Different molars in the same dentition show changes different in kind and like teeth in different racial groups show changes that are alike in kind but different in degree. As shown by changes in crown pattern of the lower molar teeth, the most advanced state is attached by the modern Whites; the most primitive stage by the West African Negroes, the Mongols being intermediate.


DOI: 10.2307/984277

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