【摘要】 广西宁明西南约 4km处新发现的一个植物群中 ,含有一些与胡桃科黄杞属现生种的翅果在形态上近似的化石。它们的果翅三裂 ,裂片具有羽状脉序。这些化石的一部分特征与黄杞属的裸果黄杞组的相似 ,另一部分特征与该属的黄杞组的相似 ,因而难以将它们归于其中的任何一组 ,作者将其归于类黄杞属。后者是胡桃科黄杞族的一个器官属 ,与目前分布于我国长江以南及东南亚地区的黄杞属以及分布于美洲新大陆的美黄杞属有密切亲缘关系。在地史时期 ,类黄杞属的代表较广泛地分布于北半球。然而 ,当前化石却是这类化石在我国南方首次被发现 ,这为探讨黄杞族的演化提供了重要线索。从当前化石的研究和有关文献中得知 ,黄杞族祖先的翅果形态与裸果黄杞组的现生种可能有某种程度的近似更多还原

【Abstract】 INTRODUCTION The present winged fruit fossils belong to the organ genus Palaeocarya Saporta emend. Manchester (Manchester, 1987). They are found from the locality (22°07.690’N, 107°02.434’E) near Gaolingtun, 4 km to the south west of Ningming County, Guangxi Zhuangzu Autonomous Region. Apart from the present fossils of Juglandaceae, there are some other macro , micro plant and fish fossils from the same locality. The macro plant fossils include Osmundaceae, Pinaceae, Taxodiaceae, Fagaceae, Lauraceae, Leguminosae, Palmae and others. The fossils of Palaeocarya are widely distributed in the Tertiary strata of the Northern Hemisphere, but so far in China only one species, P. koreanica (Oishi) Manchester, is reported from Oligocene in Jilin Province (Guo Shuang xing et al., 2002). The present Palaeocarya fossils are numerous and rather well preserved. It is the first discovery of this fossil genus from southern China and it will end the history that there was no fossil record of the related modern genus, Engelhardia , in its present distribution center and this new record would provide an important clue for searching the evolution of the Tribe Engelhardieae.更多还原