|The finger monkey is the tiniest living primate in the world. It is so small that it can hold on to your finger. This cute little primate hugs and grips on to your finger so tight that it pulls your heart strings and you wish you could take it home with you. Finger monkeys are, as a matter of fact, pygmy marmosets. They are also known by the names Pocket Monkey and Tiny Lion. These primates belong to the family Callitrichidae, species Cebuella and genus C. pygmaea. They are native to rain-forests of Brazil, Peru, Bolivia, Ecuador and Colombia.