A new species of Lepidopteris discovered from the Upper Permian of China with its stratigraphic and biologic implications  

作　　者：ZHANG Yi ZHENG ShaoLin NAUGOLNYKH Serge V 

机构地区：[1]College of Paleontology,Shenyang Normal University,Shenyang 110034,China [2]Geological Institute,Russian Academy of Sciences,Moscow 119017,Russia

出　　处：《Chinese Science Bulletin》2012年第27期3603-3609,3661,共7页

基　　金：supported by the Project 111 of China(B06008);the Scientific Research Operating Expenses,Jilin University-the Base Platform Construction Project,the National Natural Science Foundation of China (40972001);RFBR No.11-05-92692-Ind_a

摘　　要：A new species Lepidopteris baodensis sp.nov.belonging to the family Peltaspermaceae and represented by two ultimate pinnae in the collection under study,was recently discovered at the Baijiagou of Baode,Shanxi,China,from the Upper Permian Sunjiagou Formation.The lower surface of the ultimate rachis,the midrib and secondary veins is covered with triangular,trapezoid,rounded,or ligulate subepidermal swellings,which show different natures from intercalary pinnules.Lepidopteris is one of typical elements of the Late Permian Euramerican flora.Since Schimper erected the genus Lepidopteris in 1869,the entire epidermal structure of subepidermal swellings had been unclear.The new species L.baodensis clearly showing the distinguished epidermal structure of subepidermal swellings,not only enlarges and supplements our knowledge in biology and taxonomy of Lepidopteris as well as the Upper Permian stratigraphy of China,but also provides an opportunity to understand the relationship between Euramerican floras and Cathaysian floras in paleoclimatic,paleoenvironmental and paleogeographic context.A new species Lepidopteris baodensis sp. nov. belonging to the family Peltaspermaceae and represented by two ultimate pinnae in the collection under study, was recently discovered at the Baijiagou of Baode, Shanxi, China, from the Upper Permian Sunjiagou Formation. The lower surface of the ultimate rachis, the midrib and secondary veins is covered with triangular, trapezoid, rounded, or ligulate subepidermal swellings, which show different natures from intercalary pinnules. Lepidopteris is one of typical elements of the Late Permian Euramerican flora. Since Schimper erected the genus Lepidopteris in 1869, the entire epidermal structure of subepidermal swellings had been unclear. The new species L. baodensis clearly showing the distinguished epidermal structure of subepidermal swellings, not only enlarges and supplements our knowledge in biology and taxonomy of Lepidopteris as well as the Upper Permian stratigraphy of China, but also provides an opportunity to understand the relationship between Euramerican floras and Cathaysian floras in paleoclimatic, paleoenvironmental and paleogeographic context.

关 键 词：生物学意义 上二叠统 地层学 中国 新种 表皮结构 欧美植物群 华夏植物群 

分 类 号：Q914[天文地球—古生物学与地层学]