Any of about 25 species of long-tusked marmosets in the genera Leontopithecus (or Leontideus, according to some authorities) and Saguinus. Tamarins are 8-12 in. (20-30 cm) long, excluding the 12-16-in. (30-40-cm) tail. The emperor tamarin (Saguinus imperator) has long, grizzled, gray fur; a reddish tail, and a long white moustache. The three species of Leontopithecus are endangered. See also golden lion tamarin
Any one of several species of small squirrel-like South American monkeys of the genus Midas, especially M