Both species descend from a third, called Homo erectus, that lived in both Africa and Asia, but the fossil record of Homo erectus and its immediate successors is fragmentary and confusing.

• 两个物种之间的三分之一部分，称为直立人，生活在亚洲和非洲大陆，但是残骸中记录着直立人和它的直接继承者都是残破和令人困扰的。