具解剖构造的科达叶化石在我国的首次发现  

First Discovery of Anatomically-preserved Cordaitean Leaves in China

作　　者：王士俊[1] 田宝霖[1] 

机构地区：[1]中国矿业大学分析测试中心,北京研究生部

出　　处：《中国矿业大学学报》1995年第2期25-33,共9页Journal of China University of Mining & Technology

摘　　要：本文描述了我国第一种具内部解剖构造的科达叶化石─－太原科达（新种）Ｃｏｒｄａｉｔｅｓｔａｉｙｕａｎｅｎｓｉｓｓｐ．ｎｏｖ，。新种的表面形态与广泛分布于我国石炭、二叠纪地层中的带科达Ｃｏｒｄａｉｔｅｓｐｒｉｎｃｉｐａｌｉｓ（Ｇｅｒｍ；）Ｇｅｉｎ．较相似，但其内部解剖构造与欧美植物区的带科达有较大差别。新种的主要解剖特征：叶脉维管束具中始式的初生木质部；上、下表皮均具３～５条细而短的皮下厚壁组织束（脉间纹）；叶肉不分化，细胞壁内折；叶缘膨大成鼓槌状。The first species of anatomically-preserved cordaitean leaves is describedin this paper and is named Cordaites taiyuanensis sp.nov.The morphological feature of the new speciesis similar to that of Cordaites principalis(Germ.)Gein,widely distributed in the Carboniferous and Permian strata in China,but its anatomical structure is different from that of the samespecies of Euramerican Flora.The main characters of the anatomical structure are:the primary xylem of bundles is of mesarch;the upper and lower epidermises both have 3～5 thin andshort hypodermal sclerenchyma strands(interstitial strips);the mesophyll does not differentiate into palisade tissue and spongy tissue;the walls of mesophyll cells are conspicuously infolded; and the margin of the leaf is thickened into a drumstick-shaped form in the transverse section.

关 键 词：太原组 煤核 科达属 叶化石 古植物 石炭纪 

分 类 号：Q914.645[天文地球—古生物学与地层学] P618.110.2[生物学—古生物学]