新疆迟滞鳄类新材料  

New chroniosuchian materials from Xinjiang,China

作　　者：刘俊[1,2,3] LIU Jun(Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences,Institute of Vertebrate Paleontology and Paleoanthropology,Chinese Academy of Sciences,Beijing 100044;CAS Center for Excellence in Life and Paleoenvironment,Beijing 100044;College of Earth and Planetary Sciences,University of Chinese Academy of Sciences,Beijing 100049)

机构地区：[1]中国科学院古脊椎动物与古人类研究所,中国科学院脊椎动物演化与人类起源重点实验室,北京100044 [2]中国科学院生物演化与环境卓越创新中心,北京100044 [3]中国科学院大学地球与行星科学学院,北京100049

出　　处：《古脊椎动物学报》2020年第4期283-292,共10页Vertebrata Palasiatica

基　　金：中国科学院战略性先导科技专项(B类)(编号:XDB26000000);国家自然科学基金(批准号:41572019,41661134047);美国国家自然科学基金(编号:NSF EAR 1714749)资助。

摘　　要：迟滞鳄类最早的化石记录来自甘肃玉门的大山口动物群,但是中国此类动物的化石记录相对俄罗斯来说少了许多,尤其是三叠纪的。新疆已知唯一的一件标本出自锅底坑组上部。报道了产自不同层位的3件迟滞鳄类新材料,分别出自泉子街组、锅底坑组底部以及韭菜园组。这些新发现丰富了中国迟滞鳄类的多样性以及时代延限。来自锅底坑组及韭菜园组的毕氏螈科(Bystrowianidae)材料表明这类动物在二叠纪末期大灭绝中在新疆生存了下来。Chroniosuchians have the earliest representatives in Gansu,China,but the Chinese records were scarcer compared to Russia,especially the Triassic one.In Xinjiang,there was only one specimen reported from the upper part of the Guodikeng Formation.Here three new chroniosuchian specimens are reported from three new stratigraphic horizons:the Quanzijie Formation(middle Permian),the base of the Guodikeng Formation(upper Permian),and the Jiucaiyuan Formation(Lower Triassic).The osteoderm from the Jiucaiyuan Formation represents the first definite Triassic chroniosuchian from China.The new findings increase the chroniosuchian diversity and their time range in China.The bystrowianid chroniosuchian specimens from the Guodikeng and Jiucaiyuan formations demonstrated that this group survived in the end-Permian mass extinction in Xinjiang,China.

关 键 词：新疆 二叠系 三叠系 泉子街组 锅底坑组 韭菜园组 毕氏螈科 迟滞鳄类 

分 类 号：Q915.864[天文地球—古生物学与地层学]