云南临沧晚中新世黄檀属荚果和叶片化石研究  

POD AND LEAFLET FOSSILS OF DALBERGIA(LEGUMINOSAE) FROM THE UPPER MIOCENE OF LINCANG,YUNNAN

作　　者：贾高文[1,2] 刘珂男[1] 王云峰[1] 解三平[1,2] 闫德飞[1] 孙柏年[1] 

机构地区：[1]兰州大学地质科学与矿产资源学院,兰州730000 [2]现代古生物学和地层学国家重点实验室,南京210008

出　　处：《古生物学报》2013年第2期213-222,共10页Acta Palaeontologica Sinica

基　　金：国家自然科学基金(Nos.41172021;40802008);现代古生物学和地层学国家重点实验室(中国科学院南京地质古生物研究所)开放基金(No.113107);兰州大学中央高校基本科研业务费专项资金(lzujbky-2012-126)

摘　　要：豆科黄檀属植物分布于亚洲、非洲和美洲的热带和亚热带地区,化石记录相对较少,其种子所对的荚果表皮部分具明显网纹是该属荚果化石最重要的形态鉴定特征。本文对采自云南临沧晚中新世的黄檀属两种荚果化石Dalbergia cf. mecsekense,D. sp. 1以及一种叶片化石D. sp. 2进行鉴定和描述。结合黄檀属化石记录和豆科植物分子谱系的研究资料,推测该属可能起源于晚古新世的非洲大陆,跨洋流进入北美后通过大西洋陆桥进入欧洲,另一路线是随洋流进入印度板块后伴随着印度板块的漂移进入中国的海南岛,最终散布到亚洲的热带亚热带地区。The genus Dalbergia of Leguminosae distributes in the tropic and subtropic areas in Asia, Africa and America, but with poor fossil record in the world. The important feature of morphological identification of this genus is that the skin part of pod which the corresponding side of seed have obvious networks. Two fossil pod morphotypes Dalbergia cf. mecsekense and D. sp. 1 and a leaflet morphotype Dalbergia sp. 2 from the Upper Miocene of Lincang, Yunnan of China are recognized and compared. On the basis of the reported fossil record of Dalbergia in the world and the evi- dence of molecular phylogenetic tree of Leguminosac,we believe that this genus may originate at late Paleocene from Africa, then arrive at the North America over sea, and finally enter into Europe across the Atlantic Bridge. Another route may be that the genus reached to Indian Plate with the ocean current,and then they moved to the Hainan Island of China with the northward drift of the Indian Plate, finally, the genus spread to tropical and subtropical areas of Asia.

关 键 词：黄檀属 形态特征 起源 晚中新世 临沧 

分 类 号：Q915[天文地球—古生物学与地层学]