Tamarin summary

 The tamarins are squirrel-sized New World monkeys from the family Callitrichidae in the genus Saguinus. They, together with the saddle-back tamarins, are the first offshoot in the Callitrichidae tree, and therefore are the sister group of a clade formed by the lion tamarins, Goeldi's monkeys and marmosets.

Source: Wikipedia 

https://en.m.wikipedia.org/wiki/Tamarin