[Descriptive equations of the frontal-facial profile of Australopithecus africanus STS5 (Plesianthropus transvaalensis)].

By means of the method previously carried-out by performing computerized image analysis we obtained three polinomial equations (7 degree) of best curve fitting for total (fronto-facial), frontal and facial profiles respectively of a standard lateral view of the skull Plesianthropus transvaalensis. The smooth function curves approximating the historical data are perfectly coincident with the scatter diagram for frontal (variance = 0,41) and facial (variance = 0,22) equations, while for the total contour variance raises to 90,8. The finding of the best fit equation is performed by analysis of variance simultaneously to the computation of the coefficients of progressively increasing order equations starting from the second. Then coefficient of determination, standard error of estimate. Standard deviations of coefficients and variance/covariance matrix are calculated with some dimensional parameters as length, eight and projections of profile, relate indexes and arc-chord ratio.