The Masoala fork-marked lemur (Phaner furcifer), also known as the eastern fork-marked lemur or Masoala fork-crowned lemur, is found in the coastal forests of northern and western Madagascar.

Phaner furcifer subsists on a diet consisting mainly of the gum of trees in temperate deciduous forests. It has become specialized for harvesting this substance. Like most lemuriform primates, it has a toothcomb, which is used to scrape the gum that oozes from insect holes in a tree's surface. This structure consists of a row of lower teeth that are long and forward pointing.