Shark jaw shapes reveal habitat-driven evolution.
An international research team led by the University of Vienna investigated how the jaw shape of sharks has changed over the course of evolution. They conclude that in the most widespread shark species, the jaws show relatively little variation in shape over millions of years; most variable jaws were found for deep-sea sharks. The results illustrate the importance of prey, level in the marine webs and habitat in relation to jaw shape diversity among shark species.