但是这个南方古猿谱系的特性，以及早期人属的特征都是未知的。
But the identity of that lineage, and the characteristics of early Homo, are unknown.
李·伯格尔博士推断南方古猿sediba可能直接进化成了直立人，这使“能人”成为进化的旁支，甚至不是人属的一部分。
Dr Berger posits that sediba may have evolved directly into Homo erectus, leaving habilis as an evolutionary sideline, and not even part of the genus Homo.
如果距今200万年的南方古猿源泉种确实是人属的真正祖先，它怎么可能繁衍出比尔·吉姆贝尔（威廉·吉姆贝尔？） 鞋盒子中距今历史更长的化石人属？
If two-million-year-old A. sediba is indeed the true ancestor of Homo, how could it give rise to those even older fossils assigned to Homo in Bill Kimbel's shoe box?
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