Pod and Leaflet Fossils of Dalbergia (Leguminosae) from the Upper Miocene of Lincang, Yunnan Province
详细信息
- 责任者：Jia Gaowen (School of Earth Sciences ; Lanzhou University ; Lanzhou 730000 ; China) ; Liu Kenan
- 刊名：Acta Palaeontologica Sinica
- 出版年：2013
- 卷期：52(2)
- 关键词：豆科 ; Leguminosae ; 云南 ; Yunnan Province
- 页码：p.213-222
- 图表：illus., 1 table, 41 refs.
- 分类号：1102
- issnNo：ISSN0001-6616
- isbnNo：CN32-1188/Q
摘要
The genus Dalbergia of Leguminosae distri-butes 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 evidence of molecular phylogenetic tree of Leguminosae,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.