hylobatidae การใช้

Gibbons are small apes in the family Hylobatidae.
Based on their size, and some superficial similarities to modern day gibbons, Zapfe suggested that pliopithecoids were ancestral to the Hylobatidae lineage.
Those ancestors of the family Hominidae had already speciated from the family Hylobatidae ( the gibbons ), perhaps 15 million to 20 million years ago.
Within this grouping, the two families Hylobatidae and Hominidae can be distinguished from Old World monkeys by the number of molars; hominoids have five in the " Y-5 " molar pattern, whereas Old World monkeys have only four in a bilophodont pattern.
Molecular evidence indicates that the lineage of gibbons ( family Hylobatidae ), the lesser apes, diverged from that of the great apes some 18 12 million years ago, and that of orangutans ( subfamily Ponginae ) diverged from the other great apes at about 12 million years.