Class Mammalia Linnaeus, 1758 - mammals
   Subclass Theria Parker & Haswell, 1897
     Order Primates Linnaeus, 1758 - primates
       Suborder Haplorrhini Pocock, 1918 see Suborder Haplorhini Pocock, 1918
         Infraorder Simiiformes Haeckel, 1866
           Parvorder Platyrrhini Geoffroy Saint-Hilaire, 1812
             Family Atelidae Gray, 1825
               Subfamily Alouattinae (Trouessart, 1897) Elliot, 1904
                 Genus Alouatta Lacépède, 1799 - howler monkeys
                   .1 Alouatta palliata species group
                   .2 Alouatta seniculus species group
                   .3 Alouatta caraya species group
                   01 Alouatta belzebul (C. Linnaeus, 1766) - black and red howler
                   02 Alouatta caraya (Humboldt, 1812) - black howler
                   03 Alouatta coibensis Thomas, 1902
                   04 Alouatta guariba (Humboldt, 1812)
                   05 Alouatta macconnelli Elliot, 1910
                   06 Alouatta nigerrima Lönnberg, 1941
                   07 Alouatta palliata (Gray, 1848[1849]) - mantled howler
                   08 Alouatta pigra Lawrence, 1933
                   09 Alouatta sara Elliot, 1910
                   10 Alouatta seniculus (C. Linnaeus, 1766) - red howler