What is having the maxillo-palatine bones separate from each other and from the vomer, which is pointed in front, as in the gulls, snipes, grouse, and many other birds called?

schizognathous — Having the maxillo-palatine bones separate from each other and from the vomer, which is pointed in front, as in the gulls, snipes, grouse, and many other birds. (Webster's 1913.)