Simias : The Pig-tailed Langur (Simis concolor, monotypic in genus Simias) is a large, rather heavily built Old World monkey, which is adapted to climbing with their long arms. Its fur is black-brown, and its hairless face is also black. It is the only monkey in the subfamily Colobinae to have a relatively short tail; the tail is only slightly furred and is only 15 cm long. The short nose is pointed upward. The Pig-tailed Langur reaches a full grown length of approximately 50 cm and a weight of 7 kg.
Source : en.wikipedia.org/wiki/Simias