Theropods (dinosauria, saurischia) from the middle Jurassic Toutunhe Formation of the Southern Junggar Basin, NW China

From the Middle Jurassic (?Bathonian-Callovian) Toutunhe Formation of Liuhonggou, SW of Urumqi in the southern Junggar Basin (Xinjiang Uygur Autonomous Region, People’s Republic of China) theropod material is described in detail for the first time. A large carnosaur is represented by five tooth crowns from different parts of the dentition. The size of the teeth indicates an animal 6–8 m in total length. Teeth and postcranial material from the Toutunhe Formation of Sangonghe River, E of Urumqi, belong to the same or a closely related taxon. A second, smaller theropod with an estimated entire length of 3 m is represented by another tooth crown, re-markable for its bifurcated mesial carina (genetically induced abnormality ?). It is not identifiable but shows greatest similarities to members of the Coelophysoidea. The distal end of a fibula could belong to the same taxon. Two new components are thus added to the dinosaur fauna of the Toutunhe Formation, hitherto restricted to a nodosaurid and unidentified (“megalosaurid”) theropod material.