Diverse dinosaur ichnoassemblages from the Lower Cretaceous Dasheng Group in the Yishu fault zone, Shandong Province, China

摘要: New dinosaur track assemblages were discovered recently in the Tianjialou Formation of Lower Cretaceous Dasheng Group Shandong Province, China. Theropods are represented by trackways two different medium-sized groups: (1) tridactyl tracks with a typical mesaxonic shape; (2) functionally didactyl attributed to deinonychosaurian theropods. The latter report, third from enlarges global record theropod tracks, until now sparsely documented only few locations Asia, North America and Europe. A number features dromaeosaur trackway suggest assignment cf. Dromaeosauripus. Several resemble narrow-gauge, small manus ichnogenus Parabrontopodus, one large is characterised wide-gauge manus, similar Brontopodus. This suggests co-occurrence sauropod groups. further component these ichnoassemblages tetradactyl morphotype ornithischian affinity that tentatively psittacosaurs.