A multivariate approach to fingerprint variation in Papua New Guinea: Implications for prehistory

Fingerprint data from three Markham Valley populations of Papua New Guinea are presented. Initial comparisons with data from elsewhere in New Guinea by conventional bivariate methods suggest hypotheses regarding prehistory, but these methods are inconclusive. Because of this shortcoming, the application of discriminant analysis to dermatoglyphic data is justified and cautiously demonstrated. Discriminant analysis is a valid approach to the parsimonious study of fingerprint relationships among human populations. Significant discriminating variables are then used with the limited published data to display historical relationships. These marker traits include the separate frequencies of thumb, middle fingers, and little finger patterning, and the complexity of the thenar eminence. With regard to prehistory, it is concluded that fingerprint data support the hypothesis of separate origins and migrations for Papuan‐ and Melanesian‐speaking peoples. Furthermore, it is suggested that these data support the linguistic hypothesis of a second Papuan migration of Trans New Guinea Phylum speakers, up the Markham Valley into the New Guinea Highlands. Finally, gene flow is indicated from Melanesian speakers of the north coast into the interior through the Sepik and Ramu River valleys, affecting both the Trans New Guinea Phylum and other unrelated Papuan groups. Moreover, there are numerous suggestions of recent reciprocal genetic exchange between neighboring Melanesians and Papuans, without obliterating the older, separate origins of these peoples. These results suggest that fingerprints have greater phylogenetic stability than other biological parameters used in the past.