Class Mammalia Linnaeus, 1758 - mammals
   Order Primates Linnaeus, 1758 - primates
     Family Cebidae Bonaparte, 1831 - New World monkeys
       Subfamily Alouattinae (Trouessart, 1897) Elliot, 1904
         Genus Alouatta Lacépède, 1799 - howler monkeys
           1 Alouatta belzebul (C. Linnaeus, 1766) - black and red howler
           2 Alouatta caraya (Humboldt, 1812) - black howler
           3 Alouatta coibensis Thomas, 1902
           4 Alouatta fusca (É. Geoffroy Saint-Hilaire, 1812) - brown howler see Alouatta guariba guariba (Humboldt, 1812)
           5 Alouatta palliata (Gray, 1848[1849]) - mantled howler
           6 Alouatta pigra Lawrence, 1933
           7 Alouatta sara Elliot, 1910
           8 Alouatta seniculus (C. Linnaeus, 1766) - red howler