The find strengthens the suggestion that anthropoid primates are very old, and that anthropoids evolved in Asia rather than Africa, and from tarsiers, not omomyids or adapids. Having said all that, note that Bahinia consists only of a piece of jaw. Press release from AAAS, which published the paper in Science . Feature in Science News . September 13, 1999.
Gibbons swing through trees efficiently.
Mathematical models of brachiation show that it is an efficient way of getting around in trees. From Nature News Service. September 9, 1999. Shuvuuia has beta-keratin. Shuvuuia is a theropod dinosaur closely related to birds.