贵州毕节侏罗系恐龙足迹新发现

New discovery of the Jurassic dinosaur tracks from Bijie, Guizhou Province

摘要: 2019—2020年，笔者在贵州省毕节市大方县元宝箐与七星关区叶家田发现了2个恐龙足迹点。元宝箐的足迹产于自流井组马鞍山段底部，类型为基干鸟臀类的异样龙足迹和中型蜥脚类足迹，其中，异样龙足迹为四川盆地下侏罗统首次记录该类足迹。叶家田的足迹产于上沙溪庙组，类型为大型蜥脚类足迹，其造迹者可能与该组繁盛的马门溪龙、峨眉龙等大型蜥脚类有潜在的关联性。该发现对更好地理解四川盆地南缘侏罗纪早中期古脊椎动物群提供了帮助。

Abstract: From 2019 to 2020, the author found two dinosaur tracksites in Yuanbaoqing and Yejia Tian, Qixingguan District, Dafang County, Bijie City, Guizhou Province.The tracks of Yuanbaoqing were found at the bottom of Maanshan member of Ziliujing Formation, and they were reassigned to the basal ornithischian Anomoepus and medium sauropod, among which the Anomoepus were recorded for the first time in the Lower Jurassic of Sichuan Basin.The tracks of Yejiatian were found in the Upper Shaximiao Formation.They are assigned to large sauropod tracks which may have a potential relationship with large sauropods such as Mamenchisaurus that flourished in the area.This discovery is helpful for us to better understand the composition of the early and middle Jurassic vertebrate fauna in the south margin of the Sichuan Basin.