Abstract
A new genus and species of mosasaur, Moanasaurus mangahouangae of Piripauan-Haumurian age (Campanian-Maastrichtian) is described from the North Island, New Zealand. The remains upon which the new genus and species is based (disarticulated skull, teeth, vertebrae, paddle elements, and rib fragments) are sufficiently distinct to enable it to be distinguished from previously described taxa.