华夏植物地理区一个新的亚区——豫淮亚区

本文在自己工作的基础上,结合前人资料,提出了华夏植物地理区一个新的亚区——豫淮亚区,用以概括具有重要特色之位于两淮、徐州、豫西一带的二叠纪植物群区系特征.文中着力刻划了该区具有浓郁地方色彩,极高的属种分异度,保存甚佳之植物群轮廓;划分了三个植物组合,即P|Callipteridium koraiense-Cathaysiopteris whitei-Cordaites schenki组合,P_1~2 Fascipteris spp.-Lobatannularia ensifolia-Gigantonocleaspp.组合,P_1~2 Gigantopteris nicotianaefolia-Lobatannularia multifolia-Psygmorphyllummultipartitum组合.文章还结合二叠纪该区独特的区域构造、古地理、古气候等方面,从不同侧面详塑了豫淮亚区的整体格架.

A NEW SUB-PROVINCE OF CATHAYSIA FLORAL PROVINCE-YU HUAI SUB-PROVINCE

On the basis of our works with someother's materials, the paper puts forward to a new sub-province of cathaysia floral province-Yu Huai sub-province. We use the sub-province which sumarizes the peculiar permian flora characteristics located in Huai Bei, Huai Nan,Xuzhou to Yu Xian county of west part in He Nan province. In the thesis, we carefully illustrate the outline of this permian flora which has a deep regional distinguishing feature, a high diversity of the fossil plant varity and an excellent conservation. The flora can be divided into three assemblage zones,i.e.p11 Callipteridium koraiense-Cathaysiopteris whitei-Cordaites schen-ki assemblage zone, P12 Fascipteris spp. -Lobatannularia ensifolia-Giganlonoclea spp. assemblage zone,P21 Gigantopteris nicotianefolia-Lobatannularia mullifolia-Psygmorphyltum multipartitum assemblage zone. Com bining with the regional structure, the palaeogeography and the palaeoclimate of this area in permian, we try our best sketching the entire contours of Yu Huai sub-province in many different aspects.