nudifrons Elliot, 1909 The white-fronted surili (Presbytis frontata) is a species of primate in the family Cercopithecidae, the Old World monkeys.

It is endemic to the large international island of Borneo, in Indonesia, Malaysia, and possibly Brunei.

The tail is yellowish grey, with blackish coloration of hands, feet, brow, crown crest and cheeks.

This species has a sacculated stomach to assist in the breakdown of cellulose and also has enlarged salivary glands.

P. f. frontata is brownish in colour, with darker arms, legs, top and sides of the head and tail.

The white spot on the forehead is rather square compared to P. f. frontata and is divided by a vertical line of short black hairs.

P. frontata can be found in tall lowland and hill dipterocarp forests, not above 300 meters.

[3] This species is listed as vulnerable because the population trends are decreasing to more than 30% over the last three generation (approximately 30 years).