The holotype, IVPP 2300, was found in a layer of the Upper Shaximiao Formation, dating from the Oxfordian-Kimmeridgian. It consists of a partial skeleton lacking the skull. It contains six vertebrae, the coracoids, the humeri, a right radius and three spines. The original material has been supplemented after November 1978 by Zhou Shiwu of the Municipal Museum of Chongqing. A second specimen, CV 202, was referred. It represents a skeleton with a partial skull and lower jaws, some vertebrae and limb elements, and four plates. Zhou considered it likely that the holotype and CV 202 represented a single individual, as the material was not overlapping. A third specimen, CV 203, a partial skeleton lacking the skull, was made the paratype. All specimens are juvenile or subadult.