@lintworm They are new in the place, so there wasn't a sign yet for them. In Brazil we call both Miopithecus talapoin and Miopithecus agouensis the same name, wich is Macaco talapoin. Got a little conftused because of that. Thanks for the correction What are the differences between them?
@Onychorhynchus coronatus Also didn't know. According to my friends from the zoo staff, these guys were in the restricted areas of the zoo (setor extra), and only went to the exposition this month...
M. talapoin has very prominent black facial skin around the eyes and a black nose and ears. Most pictures on google images are also misidentified, below is a real M. talapoin.