Lower cretaceous avian-dominated, theropod, thyreophoran, pterosaur and turtle track assemblages from the Tugulu Group, Xinjiang, China: ichnotaxonomy and palaeoecology oleh Lida Xing, Martin G. Lockley, Chengkai Jia, Hendrik Klein, Kecheng Niu, Lijun Zhang, Liqi Qi, Chunyong Chou, Anthony Romilio, Donghao Wang, Yu Zhang, W Scott Persons, Miaoyan Wang