Multivariate analysis is applied to dental measurements of Saguinus species to analyse their systematic relationships. The shape distance between Saguinus midas midas and S. midas niger is larger than that between S. nigricollis and S. fuscicollis, both of which are generally recognized as valid species. In dental form, S. bicolor is the closest relative of S. midas. S. inustus is not linked to S. leucopus, S. geoffroyi and S. leucopus, as S. inustus shows closer affinity with S. labiatus and S. mystax than with the former 3 species.