Paleocene Wuyun Flora in Northeast China: Ulmus furcinervis of Ulmaceae  

中国东北古新世乌云植物群:榆科叉脉榆(英文)

作　　者：冯广平[1] Albert G.ABLAEV 王宇飞[1] 李承森[1] 

机构地区：[1]中国科学院植物研究所 [2]Pacific Oceanological Institute, Russian Academy of Sciences, Vladivostok 600041, Russia

出　　处：《Acta Botanica Sinica》2003年第2期146-151,共6页Acta Botanica Sinica（植物学报：英文版）

基　　金：国家自然科学基金 (3 0 13 0 0 3 0 ;3 0 0 70 0 5 6) ;卢嘉锡基金 ;中国科学院方向性项目 (KSCX2_SW_10 8)~~

摘　　要：Ulmus furcinervis (Borsuk) Ablaev is first recognized and described in the Paleocene Wuyun flora from Heilongjiang Province, China. The combination of key characteristics for identification of these leaf specimens is that they have craspedodromous secondary veins forked near the leaf marginal, tertiary veins percurrent and marginal teeth convex. Specimens formerly described as leaves of Planera cf. microphylla auct. non Newberry and Sorbaria wuyunensis Tao et Xiong in Wuyun flora are reexamined and assigned to U. furcinervis.根据叶结构特征 ,将黑龙江省古新世乌云植物群中的榆科叶化石确定为叉脉榆 (Ulmusfurcinervis (Borsuk)Ablaev) ,叶化石二级脉达缘且在叶缘区分叉、三级脉及顶、叶缘锯齿两侧边凸出。重新研究了前人鉴定为小叶普拉榆 (Planeracf.microphyllaauct.nonNewberry)和乌云珍珠梅 (SorbariawuyungensisTaoetXiong)的叶化石并将其归入叉脉榆。

关 键 词：Ulmus furcinervis ULMACEAE Paleocene 

分 类 号：Q914.88[天文地球—古生物学与地层学]