Gigantonoclea guizhouensis GuetZhi的叶部解剖研究  

ANATOMIC STUDY OF FOLIAGE LEAF OF GIGANTONOCIEA GUIZHOUENSIS GU ET ZHI

作　　者：李洪起[1] 田宝霖[1] 

机构地区：[1]中国矿业学院北京研究生部

出　　处：《古生物学报》1990年第2期216-227,270-272,共15页Acta Palaeontologica Sinica

摘　　要：一、材料来源和研究方法解剖研究所用的D-1标本是笔者于1984年5月在贵州水城大河边煤矿二采区新开辟的运输巷侧壁砂岩中采到的,其层位经对比与田宝霖和张连武(1980)描述的水城汪家寨矿区综合地层柱中龙潭组下部第8分层的中部砂岩相当。该叶片沉积时受水流冲击,以中脉为对称轴向远轴侧对折成约20°角状(图版Ⅰ,图2)。The present paper deals with a petrified foliar specimen of Gigantonoclea guizhouensis Gu et Zhi from the Longtan Formation, lower part of Upper Permain in Dahabian Coal Field, Shuicheng, Guizhou SE China. Based on the revealed anatomic characters, the habits, systematic and taxonomic problems of the species will be analyzed and discussed below.Description of anatomic characters1. Vein system Some aculei (750—1000μm long) protruded on the abaxial surface of the midrib, with their tips slanted towards the le...

关 键 词：解剖研究 气孔器 维管束鞘 纹孔口 管状分子 脉序 解剖特征 叶肉组织 大羽羊齿类 垂周壁 

分 类 号：Q91[天文地球—古生物学与地层学]