Iliosuchus

Iliosuchus (meaning "crocodile hipped") was a European dinosaur of the Bathonian (169.2 - 164.4 mya). It was approximately 1.5 m (5 ft) in length.

The only fossil record (BMNH R83) is two ilia from Stonesfield Slate, Oxfordshire, England. From these samples, von Huene described the only species, I. incognitus, in 1932. Another species, I. clevelandi, was named in 1974 but has since been moved to Stokesosaurus clevelandi. The Iliosuchus ilia have a super-acetabular ridge on the surface, similar to tyrannosaurids and many other predatory dinosaurs belonging to the group Tetanurae, including Piatnitzkysaurus and Megalosaurus. Such incomplete material is inadequate for accurate classification, nonetheless, Iliosuchus has been tentatively considered a tyrannosaurid ancestor. This is unlikely to be correct as the bones cannot be distinguished from small individuals of Megalosaurus, a megalosaurid. Whatever the case, Iliosuchus is not diagnostic and is therefore a nomen dubium.