کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8916598 | 1642441 | 2018 | 26 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Late Miocene occurrence of monogeneric family Oleandraceae from southwest China and its implications on evolution of eupolypods I
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فسیل شناسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Late Miocene occurrence of monogeneric family Oleandraceae from southwest China and its implications on evolution of eupolypods I Late Miocene occurrence of monogeneric family Oleandraceae from southwest China and its implications on evolution of eupolypods I](/preview/png/8916598.png)
چکیده انگلیسی
Yunnan in SW China is a world renowned hotspot for diverse species of vascular plants such as ferns. However, fossil records of the Cenozoic ferns there are insufficient to clarify their phylogeny and historical biogeography from a geological perspective. Among these derived ferns, the monogeneric family Oleandraceae, with a pantropic distribution, is natural and distinctive; however, its origin and evolution remains unknown because of the absence of fossil records. In this study, we identified a new fossil species belonging to the genus Oleandra cav. (Oleandraceae s. s.) from the upper Miocene of Yunnan, China based on a detailed comparison of morphologically similar genera and within this genus. Oleandra bangmaii sp. n. is characterised by a simple fertile frond with an entire cartilaginous margin. Moreover, the venation system in this genus is unique and comprises a prominent midrib along with parallel, closely-spaced secondary free veins. The sori are dorsally borne, with round kidney-shaped indusia. It represents the first fossil occurrence of the genus Oleandra (Oleandraceae) within its extant distribution, suggesting that its fossil history has persisted for at least 10â¯Ma in Asia. Our finding, together with other existing evidence, suggests that the crown of eupolypods I (the node including families Oleandraceae, Davalliaceae and Polypodiaceae) has diversified and that the climate and vegetation of Yunnan have remained relatively stable since the late Miocene.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Review of Palaeobotany and Palynology - Volume 256, September 2018, Pages 13-19
Journal: Review of Palaeobotany and Palynology - Volume 256, September 2018, Pages 13-19
نویسندگان
San-Ping Xie, Si-Hang Zhang, Tian-Yu Chen, Xian-Chun Zhang, Xu Zeng, Yang Yu,