Table 5 summarizes the mean pairwise genetic distances among the taxa included in this study. As expected, the mean distance between species of spider monkeys is smaller than the distance between either Callicebus, Cebus, Alouatta, or Lagothrix and all of the individual spider monkey taxa. Genetic distances between different species of spider monkeys range from 0.020 to 0.084. The shortest genetic distance found between two spider