Zoology: Bones

Femur from a female, 9-year-old bonobo (from the skeleton SC-123). Sometimes called the pygmy chimp, the bonobo is a species distinct from the common chimpanzee, P. troglodytes. Its behavior, especially among females, is thought to resemble humans′ more than the common chimps′. Living in the Democratic Republic of the Congo (formerly Zaire), the bonobo is smaller, has more webbing between its toes and less sexual dimorphism than the common chimp. The difference between the two chimps was first recognized by Portielje in 1916 and a few years later by Yerkes. But it wasn't until 1929 that Schwarz described the bonobo as a separate subspecies. Coolidge, in 1933, described the bonobo more fully, finally recognizing it as a distinct species. Humans, chimps, and bonobos share a common ancestry, with humans splitting off around 6 million years ago. Bonobos and chimps parted company around 3 million years ago.

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11" long / 27.9 cm