ADW: Callicebus olallae: Classification
Callicebus olallae (Olalla's titi) ...
animaldiversity.ummz.umich.edu/site/accounts/classification/Callicebus_olallae.html

Primate Factsheets: Dusky titi (Callicebus moloch) Taxonomy ...
...mörk springapa, orabassn (Swedish); C. oenanthe: Andean titi monkey, Rio Mayo titi; sugkamat (Aguaruna); bergsspringapa (Swedish); C. olallae: Beni titi monkey, Olalla's titi
pin.primate.wisc.edu/factsheets/entry/dusky_titi

ADW: Callicebus olallae: Classification
Callicebus olallae (Olalla's titi) ...
animaldiversity.ummz.umich.edu/site/accounts/classification/path/Callicebus_olallae.html

ADW: Callicebus: Classification
... Callicebus olallae (Olalla's titi)
animaldiversity.ummz.umich.edu/site/accounts/information/Callicebus.html

Genus Callicebus--13 spp
Callicebus olallae--Olalla's Titi. Callicebus oenanthe--Peruvian Mountain Titi. Callicebus cinerascens--Ashy-grey Titi. Callicebus hoffmannsi--Hoffmanns' Titi
users.edinboro.edu/plindeman/callicebus.html