Horsfeld's tarsier is the only species of tarsier in the genus Cephalopachus. Named by American naturalist Thomas Horsfield, it is also referred to as western tarsier. The species occurs on Borneo, Sumatra and nearby islands and is, like other members of the group, entirely nocturnal.
Horsfield's tarsier
Cephalopachus bancanus saltator
Horsfield's tarsier in Sarawak
Cephalopachus bancanus bancanus from Bangka in National Museum of Ireland, Dublin
Tarsiers are haplorhine primates of the family Tarsiidae, which is, itself, the lone extant family within the infraorder Tarsiiformes. Although the group was, prehistorically, more globally widespread, all of the species living today are restricted to Maritime Southeast Asia, predominantly being found in Brunei, Indonesia, Malaysia and the Philippines.
Tarsier
Tarsier image inside Philippine National Museum of Natural History
Philippine tarsier (Carlito syrichta), one of the smallest primates.
Tarsiers tree-climbing