[3] The taxonomy of the tarsiers from Sulawesi has long been confused.

[4] The species was subsequently renamed twice inadvertently, as T. fuscomanus in 1812 by Geoffroy and as T. fischeri in 1846 by Burmeister.

[4] In 1953 William Charles Osman Hill concluded that the type locality of T. spectrum was actually Makassar, although it was stated to have come from Ambon.

[4] As a result, Hill concluded that T. fuscus was a junior synonym of T.

[7] Like all Tarsius, T. fuscus is exclusively carnivorous and insectivorous, generally capturing prey by leaping on it.