Emplectopteridium alatum Kawasaki的脉序  

ON VENATION OF EMPLECTOPTERIDIUM ALATUM KAWASAKI

作　　者：刘陆军[1] 姚兆奇[1] 

机构地区：[1]中国科学院南京地质古生物研究所,南京210008

出　　处：《古生物学报》1992年第6期646-656,共11页Acta Palaeontologica Sinica

基　　金：国家自然科学基金课题(项目编号4880071)

摘　　要：Emplectopteridium alatum Kaw. 的脉序历来被描述为叶脉结网并具邻脉,主要基于具有邻脉这一特征,该种被归于美羊齿类.经笔者研究,这种植物没有邻脉而具伴网眼.这样,不但 E. alatum Kaw. 的分类位置需重新考虑,而且所谓 Emplectopteridium 演化系的基础也就完全瓦解.The venation of Emplectopteridium alarum Kawasaki has long been described as having subsidiary veins originating directly from the pinna-rachis, and mainly based on this feature the genus has been placed under the Callipterides in the book Palaeozoic Plants from China (Gu et Zhi, 1974). Recent discovery reveals that the venation of this species has accessory meshes instead of subsidiary veins. Thus the position of the genus Emplectopteridium in the artificial classification must be reconsidered, and the discovery of accessory meshes in the genus shakes the so-called Emplectopteri dium evolutinnary series to its very foundation.

关 键 词：脉序 翅编羊齿 华夏羊齿 

分 类 号：Q914.85[天文地球—古生物学与地层学]