​UAKARI (Ouakari), the native name of certain tropical American monkeys, distinguished from all other New World monkeys by their short tails. The three known species constitute the genus Uacaria (or Cothurnus) of zoologists, and are confined to the forests of Amazonia and the neighbourhood. One of them (U. calva) is remarkable for its long, silky, pale chestnut fur and brilliant scarlet face, which is naked (see Primates).