摘要
本文用木材解剖法对河南义马和鄂尔多斯盆地中侏罗世低煤级的丝炭的木材进行了研究。丝炭的材料具有鉴定属种的价值。其中有些重要材料是不能从矿化木获得的,如交叉场纹孔的类型,射线细胞径向壁有无纹孔,韧皮部有无厚壁组织(纤维或石细胞),筛域的资料;如果是苏铁类,树干的角质层材料等。通过研究建立了一个新属,两个新种和一个未定种,并统计了它们在各地煤层中的含量。
Xylotomy is used to identify wood of fusain existing in the low-rank bituminous coal in the
seams of the middle Jurassic in Yima, Henan and Ordos basin. Some materials with important
value of identification, which can not be got from the mineralized wood, can be acquired from
the fusains, for example, the pit type in the cross field, there are pits, or no, in the radical
walls of ray cells. there is sclerenchyma (fiber of scleroid ), or no, in the phloem; the materials
of sleve areas; if being of Cycadophyta, the cuticle of stem.
Description of genus and species
Perisemoxylon bispirale gen. et sp. n.
(PI. I, figs. 1～2; PI. Ⅱ,fig. 5; PI. Ⅸ. fig. 3)
Diagnosis Trachieds with bordered pits,spirals of thickenings in internal walls of trachei-
ds correspond to spirals of furrows in external ones. Ray cells with simple pits in radical walls.
Protocedroxylon lingwuense sp. n.
(PI.Ⅱ. figs. 1～31 PI. IV. figs. 1～2.)
Diagnosis Bordered pits of trachied radical walls uni-triseriate, alternate. Ray cell with
abundant bordered pits in radial, tangential, horizontal walls. Cross-field 2～6 piceoid pits.
出处
《现代地质》
CAS
CSCD
1993年第3期261-265,T004,共6页
Geoscience
