Just to clear something up for ya...
It says in his book (The Winston Effect) that he used the spring board of the Rastafarian warrior picture (hence the dreadlocks) James Cameron had on the flight to Japan for the premeire of 'Aliens' as a base for the concept then James said "Ya'know i always wanted to see something with mandibles..."
Ahhh ..so the rumor goes ..and of course Stan, being a client of Cameron's would say that..but in truth, Robert Short was hired for the initial designs after the "Hunter" suit failed ..the designs where then passed on tho SWS to elaborate on.
"While the film was still titled “Hunter” Robert Short Productions was brought in to re conceptualize the alien monster. At first RSPinc. put armor on the existing lizard-like creature, played by stuntman Jean Claude Van Damme, but this was soon scrapped. Under director John Mctiernan’s supervision Short’s team developed a new direction for the creature by creating an upright Masai warrior design complete with armor, dread locks and side mounted mandibles. After Short moved onto other projects the design was eventually used as the bases for the final creature."
I have spent time with Robert and spoke to him about his role in Predator ...he was very happy with the approach Stan took on his initial concept.
PS ..Cameron also thinks he invented 3-d ..hahahaha