甘肃窑街中侏罗世植物化石Coniopteris simplex的原位孢子特征研究  

Study on characteristics of in situ spores of Coniopteris simplex in Middle Jurassic period,Yaojie,Gansu

作　　者：辛存林[1] 魏明[1] 陈世伟[1] 孟健[1] 都卫东[1] 

机构地区：[1]西北师范大学地理与环境学院,兰州730070

出　　处：《地质科学》2012年第1期211-220,共10页Chinese Journal of Geology(Scientia Geologica Sinica)

基　　金：甘肃省自然科学基金项目(编号:096RJZA119);西北师范大学地理学重点学科基金项目资助

摘　　要：通过大量的实验分析,揭示了Coniopteris simplex的原位孢子特征,甘肃窑街盆地中侏罗世Coniopteris simplex原位孢子的基本特征可以概括为:孢子为四面体形,极面观为三角形至圆三角形,顶角钝圆,三边线内凹;体积小,极面观直径为25～38μm,平均约30μm;三射线平直或微弯,其长度为半径的2/3～3/4,宽度较窄,具唇状边缘。外壁近于光滑,但具多条不规则的褶皱;无周壁;孢子的颜色以黄褐色为主。明确了Cyathidites minor可能是Coniopterissimplex孢子,后者为前者的母体植物。The characteristics of in situ spore of Coniopteris simplex in the middle Jurassic period from Yaojie in Gansu were revealed by a large number of experimental analysis,and its basic features can be summarized as following：spores for tetrahedron,polar view from triangle to round triangle,blunt vertical angle,three concave edges,the smaller volume,the diameter of Polar view is from 25 to 38 μm and the average is about 30 μm, 3-ray flat or microbend,and its length is the radius of two-thirds to three-fourths,narrower width,lip-like edge.Exine almost smooth,with more irregular folds,no perispore,he spore by yellow-brown color.Then make clear that the spores of Coniopteris simplex are Cyathidites minor and the latter is the parent plant of the former.

关 键 词：Coniopteris SIMPLEX 原位孢子 中侏罗世 甘肃窑街 

分 类 号：P534[天文地球—古生物学与地层学] Q913[天文地球—地质学]