海拉尔地区五九盆地早白垩世拜拉一新种  

Baiera bifurcata sp.nov.,a new species from Early Cretaceous in Wujiu Basin of Hailar area,Inner Mongolia

作　　者：尹殿奎[1] 赵国伟[1] 孙跃武[1] 李涛[1] 孙春林[1] 

机构地区：[1]吉林大学古生物学与地层学研究中心,长春130026

出　　处：《世界地质》2008年第1期1-6,共6页World Geology

基　　金：国家自然科学基金项目(30670138)

摘　　要：Baiera叶部化石是欧亚大陆中生代植物群中的常见分子,广泛分布于晚三叠世—早白垩世地层中。本文根据首次发现于内蒙古海拉尔地区五九盆地下白垩统大磨拐河组的多块保存完好角质层的Baiera叶部压型标本的形态学和表皮构造研究,建立了一个新种—两叉状拜拉(新种)(Baiera bi-furcatasp.nov.)。The fossils of Baiera leaves are diverse and widespread in the Mesozoic, especially in the Late Triassic-Early Cretaceous flora in the Northern Hemisphere, Based upon compression specimens of Baiera col- lected from Damoguaihe Formation of Lower Cretaceous in the studied area, and their leaf morphology and wellpreserved cuticular characters, a new species is found for the first time and named as Baiera bifurcata sp. nov. The discovery of this new species in the Early Cretaceous significantly extends the stratigraphic and geographic distribution of Baiera, and is important for the reconstruction of Cretaceous environments.

关 键 词：两叉状拜拉 早白垩世 大磨拐河组 五九盆地 内蒙古 

分 类 号：Q911.23[天文地球—古生物学与地层学]