Sciurini is a tribe that includes about forty species of squirrels, mostly from the Americas. It includes five living genera—the American dwarf squirrels, Microsciurus; the Bornean Rheithrosciurus; the widespread American and Eurasian tree squirrels of the genus Sciurus, which includes some of the best known squirrel species; the Central American Syntheosciurus; and the American red squirrels, Tamiasciurus. Like other arboreal squirrels, they are sometimes referred to as tree squirrels.
Read more about Sciurini: Taxonomy