摘要
薄果穗属(Leptostrobus)以往在中国的确切报道仅见于川东北、青海和辽西等地,且缺少详细研究。报道了该属的模式种———疏叶薄果穗(Leptostrobuslaxiflora)在新疆准噶尔盆地西北缘的额敏白杨河中侏罗世地层的首次发现。对新发现的、保存较完整的果穗及蒴果等做了较详细的描述。同时,报道了与其伴生的其它12属近20种植物化石的组成,分析其古地理环境为有利于成煤的湖泊-沼泽相,认为其地质时代为中侏罗世。
Leptostrobus has been only reported in northeastern Sichuan, northern Qinghai and western Liaoning of China,which was with insufficient information. In this paper, the author reports the new material of L. laxiflora, the typespecies of the genus Leptostrobus, from the Middle Jurassic Xishanyao Formation in the Baiyang River of Emin of northwestern Junggar Basin of Xinjiang, which appears to be the first discovery of this species in China. The characteristics of the strobili including their capsules of the new specimens are described.The author mainly reported the floral composition of nearly 20 species belonging to 12 genera associated with Leptostrobus. Based on general paleogeographic analysis, the author considers that the Baiyang River area was of a lacustrineswamp environment favorable for coalforming during the Middle Jurassic.
出处
《吉林大学学报（地球科学版）》
EI
CAS
CSCD
北大核心
2003年第3期263-269,共7页
Journal of Jilin University：Earth Science Edition
基金
国家自然科学基金资助项目(国科金外字30111130458)
