Marmosets are the 25 New World monkey species of the genera Callithrix, Cebuella, Callibella, and Mico. All four genera are
part of the biological family Callitrichidae. The term marmoset is also used in reference to the Goeldi's Monkey, Callimico
goeldii, which is closely related. Most marmosets are about 20 centimetres (7.9 in) long. Relative to other monkeys, they
show some apparently primitive features: they have claws rather than nails, and tactile hairs on their wrists.
The tamarins are any of the squirrel-sized New World monkeys from the family Callitrichidae, classified as the genus Saguinus.
The closely related lion tamarins are in genus Leontopithecus. Tamarin habitats range from southern Central America through
middle South America (Amazon basin and north Bolivia, however not in the mountainous parts).
The Cottontop Tamarin (Saguinus oedipus), also known as the Pinché Tamarin, is a small New World monkey weighing less than
1lb (0.5 kg). It is found in tropical forest edges and secondary forests where it is arboreal and diurnal.
The Pygmy Marmoset (Cebuella pygmaea), also known as Dwarf Monkey is a monkey native to the rainforest canopies of western
Brazil, southeastern Colombia, eastern Ecuador, and eastern Peru. It is one of the smallest primates, and the smallest true
monkey, with its body length ranging from 14-to-16-centimetre (5.5 to 6.3 in) (excluding the 15-to-20-centimetre tail). Males
weigh around 140 grams (4.9 oz), and females only 120 grams (4.2 oz).
The Golden Lion Tamarin also known as Golden Marmoset, is a small New World monkey of the family Callitrichidae. Native to
the Atlantic coastal forests of Brazil, the Golden Lion Tamarin is an endangered species with an estimated wild population
of "more than 1,000 individuals" and a captive population maintained at approximately 490 individuals.
Common Marmoset (Callithrix jacchus) is a New World monkey. It originally lived on the Northeastern coast of Brazil, in the
states of Piaui, Paraiba, Ceará, Pernambuco, Alagoas and Bahia.
