Class Mammalia Linnaeus, 1758 - mammals
   Order Primates Linnaeus, 1758 - primates
     Family Callitrichidae Gray, 1821 - marmosets, tamarins
       Genus Callithrix Erxleben, 1777 - marmosets
         1 Callithrix argentata (C. Linnaeus, 1771) - silvery marmoset
         2 Callithrix aurita (É. Geoffroy Saint-Hilaire, 1812)
         3 Callithrix flaviceps (Thomas, 1903)
         4 Callithrix geoffroyi (Humboldt, 1812) - Geoffroy's marmoset
         5 Callithrix humeralifera (É. Geoffroy Saint-Hilaire, 1812)
         6 Callithrix jacchus (C. Linnaeus, 1758) - common marmoset
         7 Callithrix kuhlii Coimbra-Filho, 1985
         8 Callithrix penicillata (É. Geoffroy Saint-Hilaire, 1812) - black ear-tufted marmoset
         9 Callithrix pygmaea (Spix, 1823)