Okay Jess, I now know that their is a difference between the jaw of some of the species. In my case I have senegalus, ornate, and delhezi all upper jaw. With the ornate apparently growing the largest of these.
Then I have endlies (sp?) (is this the same as endilicheri endilicheri?) which I believe belong to the lower jaw (i am writing this before going upstairs to the tank and checking). From what I gather the lower jaws are bigger polys.
So the reason you seperate is because of potential size difference? Or is there more to it than that.