Joan Wiffen's theropod is a unnamed theropod similar to Allosaurus since the vertebrae resembled it the most.
Before it was discovered people thought dinosaurs never lived in New Zealand. One reason was because they thought it was to cold to support dinosaurs. Another reason was the islands were to small to have big animals. But then Joan Wiffen proved them wrong. Then in 1975 a strange backbone was found. It looks like an allosaur the most.
The theropod appeared in Lost Dinosaurs of New Zealand and was said to possibly a megalosaur.