The marmosets shown are thought to be hybrid of White-tufted/Common
(Callithrix jacchus) and Silvery
(Mico (formerly Callithrix) argentata), or possibly its close relative the Black-tailed
(M. melanurus).
Even though they haven't got white-tufted ears nor silvery white fur, they show traits of both parents,
with the bare face, pink ears with some tufts and the Common Marmoset's fur colour and tail.