From Australopithecus to Homo

An image of Australopithecus from Sterkfontein (Sts 5) is being "morphed" into a corresponding image of Homo erectus (KNM-ER 3733).

• List the features that seem to you to characterise the transformation.

How would you characterise the change in terms of the following parameters:

• size and formation of the eyebrow ridges;
• degree of prognathism (forward protrusion of face and jaws);
• presence or absence of a chin;
• height of the forehead and size of the cranial vault;
• presence or absence of a sagittal crest?