.Penicillata (black tuft) Marmosets are characterized by black tufts of hair around their ears. It typically has some sparse white hairs on its face. It usually has a brown or black head and its limbs and upper body are gray, as well as its abdomen, while its rump and underside are usually black. Its tail is ringed with black and white. The black-tufted marmoset reaches a size of 7 to 10 inches and weighs around 10 oz. being a little under a pound..... (xxx) xxx-xxx2