Wild bonobo populations are entirely contained in that river system, separated from two nearby
subspecies of chimps, the eastern and central subspecies.
Not exact matches
Because the skull bore the distinctive sagittal crest
of gorillas but otherwise had
chimp - like dimensions, some primatologists suggested it represented a new
subspecies of gorilla, while others believed it to be a
chimp - gorilla hybrid.
In the April 2007 issue
of the journal PLoS Genetics, researchers from the University
of Chicago, Harvard, the Broad Institute and Arizona State show that there has been very little detectable admixture between the different populations and that
chimps from the central and eastern populations are more closely related to each other than they are to the western «
subspecies.»