His research focuses mainly on skull mechanics and feeding apparatus in reptiles such as the new zealand tuatara ( sphenodon ) .
他的研究领域主要集中于头骨力学以及爬行动物的进食方式，例如新西兰大鳄蜥。
After using a method called geometric morphometrics to compare the skulls of modern sphenodon with thirteen of its fossil relatives , the biologists found that the tuatara is actually quite different from its prehistoric forebears .
