Iliosuchus

Iliosuchus (meaning "crocodile hipped") is a genus of theropod dinosaur known from Bathonian–age (168.3 – 166.1 mya) rocks of England. It was perhaps long.
The only known fossils of this genus are three ilia (BMNH R83, OUM J29780 and OUM J28971) from the Stonesfield Slate, Oxfordshire, England. From the holotype BMNH R83, Friedrich von Huene described and named the only species, "I. incognitus", in 1932. The generic name is derived from the ilium and Greek "Souchos", the crocodile god. The specific name means "unknown" in Latin. Another species, "I. clevelandi", was proposed in 1976 by Peter Galton, who assigned "Stokesosaurus clevelandi" to "Iliosuchus", but this has not been followed.
The "Iliosuchus" ilia, very small with a length of nine to ten centimetres, have a vertical supra–acetabular ridge on the surface, similar to tyrannosaurids and many other predatory dinosaurs belonging to the group Tetanurae, including "Piatnitzkysaurus" and "Megalosaurus". Such fragmentary and incomplete material is inadequate for accurate classification; nonetheless, "Iliosuchus" has sometimes been 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 dubious. If "Iliosuchus incognitus" is a tyrannosauroid, it would be a possible ancestor to "Proceratosaurus", the earliest recognized tyrannosauroid, and would be the earliest of the tyrannosauroids.