VARIATION IN TOOTH MORPHOLOGY OF PONGO-PYGMAEUS

This study examines the postcanine morphology of Pongo pygmaeus, ident ifying sexual, populational, and subspecific differences, with particu lar focus on the cusp area proportions. Little differences between the sexes were found in molar shapes, and cusp area proportions can be co nsidered population specific. Inter-population differences are signifi cant between the two Bornean populations, with the Kapuas River as a b iogeographic barrier, and are as great as inter-subspecies (Borneo-Sum atra) differences. (C) 1998 Academic Press Limited.