"Cro-Magnon" in my opinion is anything archaic-like. Besides, I'm not too convinced(or at the most speculative of it) in the whole label. Also, "narrow jaw"? You are serious? Anyways, what is that "one kind of WHG"?
"too narrow jaw"? YES! and too narrow face as a whole, if you refer to some 'cromagnon-like' (well defined type, and not a vaguely chronologic step in Human evolution: it's always the same question of labelling).
We have diverse WHG of Mesolithical times and this place them very later than the 'croma' patterns. So I use the term of "...-like" and not "..." to mark this reality. They were variable in features, but the most often two (or even three) types seems emerging:
- a 'cromagnon-like' one (subdolichocephalic skull, low linear profile of skull measured to the ears holes, "evolved" frontal, short an broad face with broad inferior jaw, rather projecting chin.
- a 'brünn-like' one (dolichocephalic skull, rather high arched profile of skull, very brutal receding frontal, stronger browridges, longer face with broad cheebones BUT rather narrow inferior jaw. Almost the contrary to 'croma'.
- a for very close to 'brünn', but with higher faced, with the same tendencies concerning the contraste between cheekbones and lower jaw; someones called it 'capelloid' on the model of 'Combe-Capelle' man (more recent than both types above, and considered by others as a more recent variant of 'brünn' types);
At mesolithic intermediary forms were common, and statures were become very variable from a group to another with some kind of irregular gradiant between SW (shortest) and NE (highest). In the Iron Gate at Mesolithic the HG's people presented the two former types, the input of every type being stronger or weaker according to groups, all this before the crossings with EEF of Anatolian origin.
Concerning the Sardinian posted here, I wrote he had some input of these WHG types but in a slight way only; but he cannot be taken as a model for 'croma' in the sensu strictu, concerning face.