Fig.1: Holotype of Jianchangnathus robustus (IVPP V16866) from a locality near Linglongta, Jianchang County,western Liaoning, China, (a) Photo and (b) drawing of the nearly complete skeleton. There is debate about the correct stratigraphic placement and consequent age of those deposits where the new specimen was unearthed. Some researchers advocate that those layers represent the Daohugou Bed (Formation), whereas others regard them as part of the Tiaojishan Formation that has been assigned to the Middle Jurassic, Late Jurassic or Late Jurassic- Early Cretaceous.　(Image by CHENG Xin)