Family Hylobatidae Gray, 1871 . Cat. Monkeys, Lemurs, Fruit-eating Bats Brit. Mus., p. 4.

COMMENTS: Vaughan (1978:39-40) included this family in Pongidae (which is here considered a part of Hominidae); but see Delson and Andrews (1975:441) and Thenius (1981). Szalay and Delson (1979:461) included Hylobatidae in Hominidae .