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 Pitheciidae Mivart, 1865
Subfamily Callicebinae Pocock, 1925
Genus Callicebus Thomas, 1903 - titi monkeys
.1 Subgenus Torquatus
.2 Subgenus Callicebus Thomas, 1903
01 Callicebus baptista Lönnberg, 1939
02 Callicebus barbarabrownae Hershkovitz, 1990
03 Callicebus bernhardi M.G.M. van Roosmalen et al., 2002 - Prince Bernhard's titi
04 Callicebus brunneus (Wagner, 1842) - brown titi
05 Callicebus caligatus (Wagner, 1842)
06 Callicebus cinerascens (Spix, 1823)
07 Callicebus coimbrai Kobayashi & Langguth, 1999
08 Callicebus cupreus (Spix, 1823)
09 Callicebus discolor (I. Geoffroy & Deville, 1848)
10 Callicebus donacophilus (d'Orbigny, 1836)
11 Callicebus dubius Hershkovitz, 1988
12 Callicebus hoffmannsi Thomas, 1908
13 Callicebus lucifer Thomas, 1914
14 Callicebus lugens (Humboldt, 1811)
15 Callicebus medemi Hershkovitz, 1963
16 Callicebus melanochir (Wied-Neuwied, 1820)
17 Callicebus modestus Lönnberg, 1939
18 Callicebus moloch (Hoffmannsegg, 1807) - dusky titi
19 Callicebus nigrifrons (Spix, 1823)
20 Callicebus oenanthe Thomas, 1924
21 Callicebus olallae Lönnberg, 1939
22 Callicebus ornatus (Gray, 1866)
23 Callicebus pallescens Thomas, 1907
24 Callicebus personatus (É. Geoffroy Saint-Hilaire, in Humboldt, 1812) - masked titi
25 Callicebus purinus Thomas, 1927
26 Callicebus regulus Thomas, 1927
27 Callicebus stephennashi M.G.M. van Roosmalen et al., 2002 - Stephen Nash's titi
28 Callicebus torquatus (Hoffmannsegg, 1807)