新疆准噶尔盆地白杨河中侏罗世植物化石新材料(英文)  

NEW MATERIAL OF MIDDLE JURASSIC PLANTS FROM BAIYANG RIVEROF NORTHWESTERN JUNGGAR BASIN, XINJIANG, CHINA^(*)

作　　者：苗雨雁[1] 

机构地区：[1]北京自然博物馆

出　　处：《古生物学报》2005年第4期517-534,共18页Acta Palaeontologica Sinica

基　　金：Supported by Ph.D.training base funds of Education of Ministry , China .

摘　　要：系统描述了准噶尔盆地西北缘白杨河地区西山窑组植物化石15属25种,首次在新疆地区发现侏罗纪真蕨类重要分子Coniopteris hymenophylloides的原位孢子及其孢子囊群,并对Phoenicopsis ( Phoenicopsis) an-gustifolia的叶角质层进行了研究。白杨河地区西山窑组迄今已知植物化石24属39种,以富含蕨类、茨康类、银杏类及松柏类,少见苏铁类等为特征,属于较为典型的内陆型、温带或暖温带植物群;其时代为中侏罗世,且可能为中侏罗世早期。该植物群应属于欧亚大陆早、中侏罗世植物地理区系中的西伯利亚区,反映了温暖潮湿、具季节性变化、并有利成煤的环境。The Middle Jurassic flora from the Xishanyao Formation in Baiyang River area of northwestern Junggar Basin, Xinjiang, China comprises 39 species belonging to 24 genera, so far as known. 25 species of 15 genera are described in this paper. Among them, the spores in situ Coniopteris hymenophylloides with their sporangia and sori are found for the first time in Xinjiang. Anatomically, the cuticles of the leaves of Phoenicopsis （Phoenicopsis） angustifolia are also first studied with SEM in this area. The present flora is characterized by dominance of ferns, czekanowskiales, ginkgoales and conifers, and scarcity of bennettitales and cycadales. The flora belongs to a typical inland flora probably reflecting a warm-temperate climate. The geological age of the flora is Middle Jurassic and might be the early Middle Jurassic. Paleophytogeographically, the flora belongs to the Siberian Region of the Early-Middle Jurassic Eurasian Realm, indicating a warm and humid climate with seasonal changes, which was favorable for coal formation.

关 键 词：植物群 中侏罗世 准噶尔盆地 新疆 准噶尔盆地西北缘 中侏罗世早期 植物化石 新疆地区 白杨 新材料 

分 类 号：Q914.2[天文地球—古生物学与地层学]