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title: A Miocene leaf fossil record of Rosa (R. fortuita n. sp.) from its modern diversity center in SW China
author: Su, Tao;  Huang, Yong-Jiang;  Meng, Jing;  Zhou, Zhekun
Issued Date: 2016
Abstract: Roses (Rosa, Rosaceae) are arguably the most admired ornamental plants in the world. Southwestern China is the center of diversity for many extant native species of Rosa and fossils found in this region are critical for understanding the evolution of this genus. Herein, we report a leaf fossil record with good preservation from the late Miocene of Yunnan Province. The opposite and odd-pinnate leaf is composed of seven elliptical leaflets, with close, crenulate, and regular marginal teeth. The stipules are lanceolate and adnate to the petiole. Additionally, the secondary veins are semicraspedodromous, showing the same venation pattern as most living Rosa species in southwestern China. On the basis of the extensive morphological comparisons, we propose a new species, R. fortuita T. Su et Z.K. Zhou n. sp. This is the first confirmed Rosa leaf fossil record in China, and the discovery of R. fortuita n. sp. indicates that Rosa existed in southwestern China by the late Miocene. It suggests that Rosa was distributed in subtropical or temperate forests and shared a similar ecological niche as Rosa in Europe during the Oligocene and Miocene. The modern diversification of Rosa in southwestern China is thought to have been closely associated with the continuous uplift of the Qinghai-Tibet Plateau since the late Miocene, creating complex topography and a variety of climate conditions.
Source: Palaeoworld
Appears in Collections:古生态研究组_期刊论文

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Recommended Citation:
Su, Tao,Huang, Yong-Jiang,Meng, Jing,et al. A Miocene Leaf Fossil Record Of Rosa (r. Fortuita N. Sp.) From Its Modern Diversity Center In Sw China[J]. Palaeoworld,2016,25(1):104-115.

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