Finger dermatoglyphics of Mexican Indians

Fingerprints of 98 Mexican Indians, being 54 Atlahualco and 44 Totolacatla males and females have been analyzed. Whorls are less frequent in Atlahualco (39.4%) than in Totolacatla (41.4%) (p>0.01) and loops are more frequent in Atlahualco (58.7%) than in Totolacatla (57.6%) (p>0.01). The index of pattern intensity displays a lower value in Atlahualco (13.8) than in Totolacatla (14.1). The bimanual differences in both sexes are not statistically significant for the occurrence of patterns on the digits of the right and left hands from both groups (p>0.05). Also the difference between both sexes for the occurrence of patterns is not statistically significant in both groups (p>0.05). Incidences of actual symmetry on homologous digits represent 81.4% in Atlahualco and 79.6% in Totolacatla. The mean total ridge counts show 120.7 in Atlahualco and 130.9 in Totolacatla, respectively. There are statistically significant both in sexes of Atlahualco (p<0.01) and Totolacatla. (p<0.05). In conclusion, finger dermatoglyphic features of Atlahualco and Totolacatla are largely within the ranges of Mongoloids.