Fig. 280.—A, Skull of a young Orang-Utan. Simia satyrus. (One-third natural size.) B, Skull of an adult Orang-Utan. (One-third natural size.) (From Wiedersheim's Structure of Man.)
Given in MSW3 as a synonym of Pongo pygmaeus pygmaeus.
Date 1902
Source The Cambridge Natural History, Volume X—Mammalia.
Author Frank E. Beddard
Source: https://commons.wikimedia.org/wiki/File:Cambridge_Natural_History_Mammalia_Fig_280.png

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.