Bipedal forerunner of modern humans (4,7)

I believe the answer is:

homo erectus

(Other definitions for homo erectus that I've seen before include "Early hominid" , "Early man, walking upright - smoother cue (anag)" , "Early hominin" , "Early man, walking upright -- cue theorems (anag)" , "Java or Peking man" .)

I've seen this clue in The Times.

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