Central Javan Gibbon
Hylobates moloch pongoalsoni Sody, 1949
CR A1cd, C2a

As mentioned above, the taxonomic status of the central Javan gibbon is debated among primatologists, and the species, Hylobates moloch, may in fact be monotypic. If H. m. pongoalsoni is indeed a valid taxon, however, it is not known to occur in any protected areas, and there are no valid estimates of its population.