Class [Mammalia] Linnaeus, 1758 - mammals
   Order Primates Linnaeus, 1758 - primates
     Family Cebidae Bonaparte, 1831 - New World monkeys
       Genus Saimiri Voigt, 1831 - squirrel monkeys
         1 Saimiri boliviensis (I. Geoffroy Saint-Hilaire & Blainville, 1834)
         2 Saimiri oerstedii (Reinhardt, 1872) - red-backed squirrel-monkey
         3 Saimiri sciureus (C. Linnaeus, 1758) - common squirrel-monkey
         4 Saimiri ustus (I. Geoffroy Saint-Hilaire, 1843)
         5 Saimiri vanzolinii Ayres, 1985