Study on the fossil plants and the palynological assemblage is the basic botanical research on the coal bearing strata. The practice indicate that comprehensive data from the study on the fusinized wood fossil, the ph...Study on the fossil plants and the palynological assemblage is the basic botanical research on the coal bearing strata. The practice indicate that comprehensive data from the study on the fusinized wood fossil, the phyterals and the analysis of dispersed cuticles will effectively improve the level of the study on the coal bearing strata as a whole.展开更多
对浙江天台中新统下南山组6块叶片压型化石——天台润楠Machilus tiantaiensis Ding S.T.et Sun B.N.sp.nov.,并对其叶结构和表皮构造特征进行了详细的研究.其主要特征为:叶椭圆形,全缘,顶端渐尖,基部楔形,侧脉羽状;表皮细胞垂周壁浅波...对浙江天台中新统下南山组6块叶片压型化石——天台润楠Machilus tiantaiensis Ding S.T.et Sun B.N.sp.nov.,并对其叶结构和表皮构造特征进行了详细的研究.其主要特征为:叶椭圆形,全缘,顶端渐尖,基部楔形,侧脉羽状;表皮细胞垂周壁浅波状,单细胞毛基多集中于脉络区;气孔下生式,气孔器短平列型,副卫细胞1~2个.通过与现生植物进行对比分析,发现当前标本的叶结构和表皮构造特征与樟科润楠属(Machilus)十分一致.利用PAST(palaeontological statistics)软件对我国润楠属68种植物叶片的形态特征进行聚类分析,结果表明当前化石与M.pingii Cheng ex Yang最为接近;角质层分析也表明二者的表皮构造最为相似.利用化石与其现存最近亲缘种M.pingii的气孔比率,恢复了天台晚中新世的古大气CO2体积分数为407.9×10-6.此外,依据现生润楠属主要分布于亚洲东南部和南部的热带、亚热带地区,推断天台地区中新世的古气候较为温暖湿润.展开更多
文摘Study on the fossil plants and the palynological assemblage is the basic botanical research on the coal bearing strata. The practice indicate that comprehensive data from the study on the fusinized wood fossil, the phyterals and the analysis of dispersed cuticles will effectively improve the level of the study on the coal bearing strata as a whole.
文摘对浙江天台中新统下南山组6块叶片压型化石——天台润楠Machilus tiantaiensis Ding S.T.et Sun B.N.sp.nov.,并对其叶结构和表皮构造特征进行了详细的研究.其主要特征为:叶椭圆形,全缘,顶端渐尖,基部楔形,侧脉羽状;表皮细胞垂周壁浅波状,单细胞毛基多集中于脉络区;气孔下生式,气孔器短平列型,副卫细胞1~2个.通过与现生植物进行对比分析,发现当前标本的叶结构和表皮构造特征与樟科润楠属(Machilus)十分一致.利用PAST(palaeontological statistics)软件对我国润楠属68种植物叶片的形态特征进行聚类分析,结果表明当前化石与M.pingii Cheng ex Yang最为接近;角质层分析也表明二者的表皮构造最为相似.利用化石与其现存最近亲缘种M.pingii的气孔比率,恢复了天台晚中新世的古大气CO2体积分数为407.9×10-6.此外,依据现生润楠属主要分布于亚洲东南部和南部的热带、亚热带地区,推断天台地区中新世的古气候较为温暖湿润.