|Named By:||Hector in 1874|
|Time Period:||Late Cretaceous|
|Location:||New Zealand - Conway Formation. Antarctica, James Ross Island - Santa Marta Formation. Japan|
|Size:||Often cited at being 6 meters long, the addition of Tylosaurus haumuriensis has raised the prospect that Taniwhasaurus may have grown up to 12 meters long|
|Fossil(s):||Several specimens, usually of scattered skull and post cranial remains|
|Classification:||| Chordata | Reptilia | Squamata | Scleroglossa | Mosasauridae | Tylosaurinae ||
|Also known as:||| Lakumasurus | Tylosaurus haumuriensis ||
Taniwhasaurus (from the Maori Taniwha, a supernatural, aquatic creature, and the Greek sauros/sauros, meaning lizard) is an extinct genus of mosasaur (carnivorous marine lizards) which inhabited New Zealand, Japan and Antarctica. The genus was a close relative of the genera Tylosaurus and Hainosaurus.