Hyosciurus is a genus of rodent in the family Sciuridae endemic to Sulawesi, Indonesia. It contains the following species: \n* Montane long-nosed squirrel (Hyosciurus heinrichi) \n* Lowland long-nosed squirrel (Hyosciurus ileile) The genus name is a combination of Greek hys, hyos 'pig' and skiouros 'squirrel', in reference to the snouts which are relatively long compared to other squirrels.