Re: Bipedalism and the Terrestrial Sifaka Theory

Elaine Morgan (
Sat, 08 Jul 1995 13:56:58 GMT

Sifakas are a good try. But they are not brachiators, or
climbers of the type the latest common ancestor is now
believe to have been. Their mode of locomotion is known as
leap-and-cling. The indris and other Madagascar lemurs get
around in the same way. On the ground the sifaka does not
walk as we do. It proceeds by sideways two-footed jumps like
a child in a sack race. I do not think this is a likely
origin for our own locomotor bipedalism.

Elaine Morgan