any tailless ape of the families Pongidae and Hylobatidae

used in some classifications for the lesser apes (gibbons and siamangs); sometimes considered a subfamily of Pongidae

smallest and most perfectly anthropoid arboreal ape having long arms and no tail; of southern Asia and East Indies

large black gibbon of Sumatra having the 2nd and 3rd toes partially united by a web

used in some classifications for the lesser apes (gibbons and siamangs); sometimes considered a subfamily of Pongidae