摘要
报道了来自中国云南元谋新华土林上新世地层的木化石新种——元谋紫薇Lagerstroemioxylon yuanmouensis Y.M.Cheng,C.S.Li,X.M.Jiang & Y.F.Wang。目前紫薇属Lagerstroemia分布于亚洲至澳大利亚北部的热带森林中,其中有一些种在我国的西南部和台湾省也有分布。在印度、缅甸、印度尼西亚和德国的第三纪地层中曾报道有紫薇属木化石的存在,这表明该属在第三纪分布的范围比现代更广。
Lagerstroemioxylon yuanmouensis sp. nov. is established from the Pliocene sediments near Xinhua, Yuanmou Basin, Yunnan, China. Its growth rings are distinct. Pores diffuse, solitary, and in radial multiples; perforation plates simple; intervessel pits alternate, vestured; vessel-ray pits alternate; tyloses thin-walled, abundant in vessels. Septate fibers distinct. Axial parenchyma predominantly paratracheal, narrow vasicentric and marginal. Rays mostly uniseriate, homocellular. The genus Lagerstroemioxylon was reported in the Tertiary sediments of India, Myanmar, Indonesia and Germany, which might indicate that Lagerstroemia living today in tropical forests of Asia and North Australia grew wider during the Tertiary.
出处
《植物分类学报》
CSCD
北大核心
2007年第3期315-320,共6页
Acta Phytotaxonomica Sinica
基金
Supported by the projects of the National Basic Research Program of China,Grant No.2004CB720205
the National Natural Science Foundation of China,Grant No.30530050.
关键词
生物地理
紫薇属
紫薇木属
千屈菜科
上新世
云南
中国
biogeography, Lagerstroemia, Lagerstroemioxylon, Lythraceae, Pliocene,Yunnan,China.,Yunnan, China.
