What is "duriavenator"

Duriavenator is a genus of theropod dinosaur described in 2008 by Roger Benson; its finds were excavated in England. The type species is D. hesperis, formerly known as Megalosaurus hesperis. Duriavenator lived during the Bajocian stage, around 170 million years ago, making it one of the oldest-known tetanurans. The genus name combines the Latin name of Dorset, Duria, with Latin for "hunter", venator. This genus has also gone under the unofficial name "Walkersaurus", which is a nomen nudum.