Presbytis melalophos siamensis Müller & Schlegel, 1841 Dataset GBIF Backbone Taxonomy Rank SUBSPECIES Classification kingdom Animalia phylum Chordata class Mammalia order Primates family Cercopithecidae genus Presbytis species Presbytis melalophos Name Homonyms Presbytis melalophos siamensis Müller & Schlegel, 1841