CASHP, The George Washington University, 2110 G Street, NW Washington, District of Columbia 20052, USA.
Nature. 2011 Feb 17;470(7334):347-52. doi: 10.1038/nature09709.
The relationships among the living apes and modern humans have effectively been resolved, but it is much more difficult to locate fossil apes on the tree of life because shared skeletal morphology does not always mean shared recent evolutionary history. Sorting fossil taxa into those that belong on the branch of the tree of life that leads to modern humans from those that belong on other closely related branches is a considerable challenge.
现生猿类与现代人类之间的关系已经得到有效解决，但要在生命之树上定位化石猿类则困难得多，因为共享骨骼形态并不总是意味着具有共同的近期进化史。将化石分类归入那些属于通往现代人类的生命之树分支的类群，而不是归入其他密切相关的分支，这是一个相当大的挑战。
