[AlotOfReading]

Some of the marks on it, particularly the head marks, are right over areas of the thickest bones. It's not impossible, but always worth being self-critical of "obvious" meanings with things like this.

Things that are straightforward even to us as non-expert megafaunal hunters would probably be completely obvious to actual experts (if it's not wrong), and people usually don't want to record the obvious stuff.

[idiotsecant]

It's also possible the meaning is inverted. Kill the animal by throwing a spear anywhere other than these places

[WalterBright]

And put the armor where the bullet holes on surviving planes aren't.

[amatecha]

Yeah I was wondering about that too (the shoulder area for example), conversely maybe striking there is the most likely to cripple the animal, thus making it easier to catch? But I was thinking that as well, "maybe these are the least desirable areas to strike". Either way I was just surprised they really skimmed over the "meaning", when I expected the paper would have delved a bit further into that.