@TomTomBinks,
I am not a monkey guy(I only play one on tv). So remember, anything on Wikipedia is wholly suspect.
I do know that
Sivapithecus a "last" common ancestor of all the great apes, left Gibbons out of the mix. However, it appears that the gibbons just fit on a separate off line. The orang line diverges off the Sivapithecus line shortly thereafter so orangs re NOT on the final 3 line and ,technically, dont bunch in with either chimps bonobos, gorillas , and
people from West Virginia.