The marmosets (/ˈmɑːrməˌzɛts, -ˌsɛts/[3][4]), also known as zaris, are twenty-two 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 marmoset, Callimico goeldii, which is closely related.