A pachycephalosaurid dinosaur from Madagascar and a Laurasia-Gondwanaland connection in the Cretaceous

THE discovery of a pachycephalosaurid dinosaur in the Upper Cretaceous of Madagascar is reported here. This finding casts new light on the existence of a land connection (or several such connections) between Laurasia and Gondwanaland sometime in the Lower or Mid-Cretaceous. Hitherto this family of dome-headed ornithischians had only been known from the Northern Hemisphere: from the Lower Cretaceous of England¹ and the Upper Cretaceous of North America² and East Asia³.