Dutch primatologist Marc Van Roosmalen of the national Amazon research institute has discovered four previously unknown types of monkey while combing the Amazon forests.

One of the new monkeys belongs to the callthrix genus and has been baptised "manicore marmoset' by the Dutch primatologist. The squirrel-sized manicore has a greyish white body with naked ears, orange legs, a black tail and a pinkish face. An average adult measures 22 cm with a 38-cm tail and weighs around 350 gm. Another is a member of Callicebus genus, known to the locals as "Zog-zog.' It has a reddish-orange beard and belly, a greyish-brown back and a white spot on the tip of its tail. An average adult measure about 40 cm and weighs just over a kilogram. Scientists around the world are excited by these discoveries, remarkable even by Brazilian standards. With 80 of the world's 250 known monkey species