In 1988, an incomplete skeleton of a stegosaurian dinosaur was found in Lower Cretaceous strata of the Ordos Basin of China by the Dinosaur Project (China - Canada - Alberta - Ex Terra). The material includes an articulated series of vertebrae from the last three cervicals to the first five caudals, and the right ilium. The specimen is identified as a new species called Wuerhosaurus ordosensis. It is the only Lower Cretaceous stegosaur known with an articulated series of dorsal vertebrae, which have been reduced to eleven in number.