Abstract
Dental characteristics of Aeta, one of the Negrito tribes in westcentral Luzon, the Philippines, were compared with those of Japanese, Ainu, PimaIndians, Australian Aborigines, Filipinos, American Caucasoids and American Blacks. The overall tooth size of Negritos is smallest among the populations compared and closest to Ainu. As regards the shape factor of the dental measurements, they are closely related to Mongoloid populations as revealed by Q-mode correlation coefficients. These findings are almost parallel to the results obtained by principal component analysis. On the other hand, Bsquare distances based on seven non-metric crown characters show close affinity between Negritos and Ainu. The frequency distribution of the crown characters in both populations well corresponds to the Sundadont pattern defined by TURNER (1987).The results obtained from the present study, together with TURNER'S (1978, 1979, 1987, 1989) dental anthropological model of the late Pleistocene population history in southeast Asia, support the hypothesis proposed by OMOTO (1984, 1986) who suggested that Negritos might have shared an ancestral stock with Semang of Malaysia and evolved in the upper Pleistocene times under the environment of tropical rain-forest in Sundaland.
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