Which of the following had the smallest brain capacity?
Homo habilis
Brain capacity in decreasing order
Homo sapiens (1300 - 1600. c.c)
Homo neanderthalensis ( approx 1400.c.c)
Homo erectus ( 600 - 700.c.c.)
Homo habilis (550 - 687.c.c)
Thus the lowest brain capacity is that of Homo habilis as shown above. They represented the first man like ancestor.