青海达哈煤矿上二叠统大羽羊齿植物的发现  

Discovery of gigantopterid plants from the upper Permian of Daha Coalfield,Qinghai Province

作　　者：孙伟[1] 陈明[1] 宋春彦[1] 谢尚克[1] 李学仁 周卫明 SUN Wei;CHEN Ming;SONG Chun-yan;XIE Shang-ke;LI Xue-ren;ZHOU Wei-ming(Key Laboratory for Sedimentary Basin and Oil and Gas Resources,Department of Natural Resources,Chengdu Center of Geological Survey,China Geological Survey,Chengdu 610081,China;State Key Laboratory of Palaeobiology and Stratigraphy,Nanjing Institute of Geology and Palaeontology,Chinese Academy of Sciences,Nanjing 210008,China)

机构地区：[1]自然资源部沉积盆地与油气资源重点实验室,中国地质调查局成都地质调查中心,成都610081 [2]现代古生物学和地层学国家重点实验室,中国科学院南京地质古生物研究所,南京210008

出　　处：《古生物学报》2022年第3期479-493,共15页Acta Palaeontologica Sinica

基　　金：国家自然科学基金(41802011,42172018);中国科学院战略性先导专项(B)(XDB26000000);中国地质调查局项目(DD20221661);现代古生物学与地层学国家重点实验室(20201103)联合资助。

摘　　要：青藏高原存在着二叠纪华夏与冈瓦纳植物群的部分界线。本文报道青海省沱沱河地区乌丽煤矿邻近区达哈煤矿一处新的晚二叠世大羽羊齿化石产地,描述产于泥岩层中的大羽羊齿叶片化石4属5种。其中Gigantopteris cf.dictyophylloides、Filigigantopteris asymmetrica及F.dahaia等具双重网脉大羽羊齿植物的发现,进一步明确当前化石产地为华夏植物地理区的属性,同时为该类型植物向西迁移至中东地区提供了重要的桥梁证据。此外,当前大羽羊齿叶片化石大小悬殊,且未发现长叶柄、钩或刺状结构,推测这几类大羽羊齿植物可能不具备攀援的生长习性。The Tibetan Plateau contains part of the boundary between the Permian Cathaysian and Gondwanan floras.In this paper,we report a new gigantopterid fossil locality from the upper Permian of Daha Coalfield,an area close to the Wuli Coalfield in the Tuotuohe District of Qinghai Province,China.We describe five species in four genera of gigantopterid leaves collected from a mudstone bed.Among these fossils,the discovery of double-meshed gigantopterids such as Gigantopteris cf.dictyophylloides、Filigigantopteris asymmetrica and F.dahaia further demonstrates the palaeogeographic affiliation of the fossil locality with the Cathaysian Realm,and suggests the existence of a land bridge for the westward expansion of the Cathaysian flora to the Middle East.In addition,the leaves vary greatly in size.The lack of long petioles,hooks and prickles suggests that these gigantopterid plants may not be climbers.

关 键 词：达哈煤矿 华夏植物群 大羽羊齿 植物古地理 生长习性 

分 类 号：Q914[天文地球—古生物学与地层学]