One species, that is well-represented in Colombian zoos (116 individual animals, immagine!), but currently absent from Europe (and in the past with just one former holder), is the White-footed tamarin (Saguinus leucopus) (EN species). There is collaboration for ex-situ and in-situ conservation between EAZA (Zoo de Beauval, France) and Colombian Association of Zoos and Aquaria, and recent successes like donated private land of about 40 hectares in Colombia dedicated also for this species. Other: -Golden lancehead (?) -Andean cat (?) -Bolivian red howler (?) - not sure if any of these is well-represented in certain country, or it is just present. What other animals, falling into this classification can you add?
Andean Cat are by no means "well-represented" in South American collections whatsoever, given the fact that the individual briefly held in captivity last year which @devilfish was fortunate enough to see was the first such individual in *decades* and also the source of the best photographs taken of the taxon - a mere decade or so ago the best available image was this one:
Golden lanceheads are not especially widely held, although a few Brazilian collections hold a large number between them. I wouldn't say that the Bolivian howlers are widely held either, with only a couple of collections maintaining the species. There is a continuing plan to bring some of the white-footed tamarins to Europe - I think there are even more in captivity than you mention - but paperwork continues to stand in the way. As @TeaLovingDave mentions, there are currently no Andean cats in captivity.
Oh yes, species present in SA collections but very rare or absent outside of SA are various. I can think of 3 quickly Culpeo fox Monk Saki Grey Brocket deer Now Mexico is not part of SA, but we have notable 2 species very rare or absent outside of our country in animal collections but held in various mexican zoos Volcano rabbits outside of Mexico city zoos only in Nagoya zoo Yucatan brocket deer only Xcaret, and the 2 Merida zoos.