Onychorhynchus coronatus
Well-Known Member
In dutch a very nice one is witgezichtpenseelaapje, witoorpenseelaapje and zwartoorpenseelaapje translating to white-headed, white-eared (common marmoset) and black-eared brush-monkey (black-tufted marmoset). With brush I am talking about something like a painting brush referring to their tails.
Wish it was that simple with some of the other marmosets and the tamarins in terms of names across languages but it isn't unfortunately (particularly the lion tamarins) so the scientific names do come in use sometimes.