Yunguisaurus is known from the
holotype NMNS 004529/F003862, an articulated and almost complete
skeleton missing only the distal tail. The preserved skeleton has a length of about with estimated total length about , while
paratype specimen became much larger with length around . It was collected near Huangnihe River, Chajiang of Guizhou, from the
Falang Formation. It is thought to belong to the
Paragondolella naantangensis-P. polygnathiformis Assemblage Zone, dating to the
Carnian stage of the early
Late Triassic. It differs from other pistosauroids by a combination of characters. Nevertheless, its original description is a preliminary report while the postcranial skeleton still waits for further preparation and full description. ==Etymology==