High Quality Content by WIKIPEDIA articles The muriquis, also known as woolly spider monkeys, are the monkeys of the genus Brachyteles. They are closely related to both the spider monkeys and the woolly monkeys. There are two species, the southern (B. arachnoides) and northern muriqui (B. hypoxanthus). They are the two largest species of New World monkeys, and the northern species is one of the most endangered of all the world's monkeys. They are...