Skull of Bornean orangutan - ("Pithecus brookei")
Date 1853
Source Journal of the Asiatic Society of Bengal 1853
Author Unknown
Source: https://commons.wikimedia.org/wiki/File:Orangutan_skull_JASB_1.jpg

The Bornean orangutan (Pongo pygmaeus) is a species of orangutan native to the island of Borneo. The Bornean orangutan lives in tropical and subtropical moist broadleaf forests in the Bornean lowlands and mountainous areas. It can be found in the two Malaysian states of Sabah and Sarawak, and three of the four Indonesian Provinces of Kalimantan.