中国贵州中生代四足类足迹化石的回顾与新发现*

贵州省拥有丰富的中生代脊椎动物化石记录,多为三叠纪海生爬行类化石,侏罗纪和白垩纪的脊椎动物化石较少。目前,贵州省已发现中生代爬行类足迹点9处,分别为贞丰牛场、贞丰龙场、安顺幺铺、赫章辅处、毕节响水(2处)、仁怀茅台、赤水宝源和习水同民足迹点。文中除描述了贞丰龙场新增的一批足迹化石外,整理并总结了所有足迹点的发现史、研究现状、足迹类型与特征以及所反映的古生态信息。已发现的遗迹记录由69条行迹和420个孤立足迹组成,足迹总数达991个。所有的遗迹化石指示了至少477个造迹者,包括海生爬行类、手兽足迹类、非鸟兽脚类、鸟类、蜥脚类和鸟臀类等,其中三叠纪以海生爬行类主导,侏罗纪和白垩纪以蜥臀类主导。这个数据集为贵州中生代古生物类群的多样性提供了重要的信息,是晚中生代稀缺骨骼化石记录的良好补充,为研究贵州省中生代脊椎动物群的古生态与古环境提供了更多的证据。

Review and new discovery of the Mesozoic tetrapod footprints in Guizhou Province,China

Guizhou Province is rich in records of Mesozoic vertebrate fossils,mostly Triassic marine reptile fossils,while Jurassic and Cretaceous vertebrate fossils are scarce. There are nine Mesozoic tetrapod track sites discovered in Guizhou Province,which are Niuchang and Longchang sites from Zhenfeng,Yaopu site from Anshun,Fuchu site from Hezhang,Xiangshui sites I and II from Bijie,Maotai site from Renhuai,Baoyuan site from Chishui and Tongmin site from Xishui. This paper described more tracks of Longchang site from Zenfeng,and try to summarize the discovery and research history,track types and their characteristics,and the palaeoecological information reflected in all nine track sites. All these records consist of 69 trackways and 420 isolated tracks for a total of 991 tracks of tetrapod remains indicative of at least 477 trackmakers,including marine reptiles,chirotheriids,non-avian theropods,birds,sauropods,and ornithischian dinosaurs. Among them,the Triassic track records are dominated by marine reptiles,while the Jurassic and Cretaceous records show the dominance of saurischian. This dataset is an important supplement to the scarce bone fossils of the Late Mesozoic that contributed to the diversity of Mesozoic paleontological taxa in Guizhou Province,and provides more evidence for understanding the palaeoecology and palaeoenvironment of the Mesozoic vertebrate fauna of Guizhou Province.