? sumatranus Müller & Schlegel, 1841 Dataset GBIF Backbone Taxonomy Rank UNRANKED Classification kingdom Animalia phylum Chordata class Mammalia order Primates family Cercopithecidae genus Presbytis species Presbytis sumatrana Name Homonyms ? sumatranus Raffles, 1822 ? sumatranus R.G.W.Ramsay, 1882 ? sumatranus Müller & Schlegel, 1841