Class [Mammalia] Linnaeus, 1758 - mammals
   Order Primates Linnaeus, 1758 - primates
     Family Pongidae Elliot, 1913 - great apes see Subfamily Ponginae Elliot, 1913
       Genus Pongo Lacépède, 1799 - orangutan
         1 Pongo pygmaeus (C. Linnaeus, 1760) - orang-utan