来自中国下白垩统的一枚花芽。
A Flower Bud from the Lower Cretaceous of China.
作者信息
Chen Li-Jun, Wang Xin
机构信息
Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization, the National Orchid Conservation Center of China and the Orchid Conservation & Research Center of Shenzhen, Shenzhen 518114, China.
State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology and CAS Center for Excellence in Life and Paleoenvironment, Chinese Academy of Sciences, 39 East Beijing Road, Nanjing 210008, China.
出版信息
Biology (Basel). 2022 Nov 1;11(11):1598. doi: 10.3390/biology11111598.
BACKGROUND
Although various angiosperms (including their flowers) have been reported from the Yixian Formation (Lower Cretaceous) of China, which is famous worldwide for its fossils of early angiosperms, no flower bud has hitherto been seen in the Early Cretaceous. Such a lack of examples hinders our understanding of the evolution of flowers.
METHODS
The specimen studied in the present paper was collected from an outcrop of the Yixian Formation (the Barremian-Aptian, Lower Cretaceous) of Dawangzhangzi in Lingyuan, Liaoning, China. The specimen was photographed using a Nikon D200 digital camera, its details were observed and photographed using a Nikon SMZ1500 stereomicroscope, and some of its details were observed using a Leo 1530 VP SEM.
RESULTS
We report a fossilized flower bud, gen. et sp. nov, from the Yixian Formation of China. The debut of in the Yixian Formation provides first-hand material for debate on the early evolution of angiosperm flowers and underscores the great diversity of angiosperms in the Yixian Formation.
背景
尽管中国早白垩世义县组（因早期被子植物化石而闻名于世）已报道过多种被子植物（包括其花朵），但迄今为止在早白垩世尚未发现花芽。此类实例的缺失阻碍了我们对花进化的理解。
方法
本文研究的标本采自中国辽宁凌源大王杖子义县组（早白垩世巴列姆期—阿普特期）的一处露头。该标本用尼康D200数码相机拍照，其细节用尼康SMZ1500体视显微镜观察并拍照，部分细节用Leo 1530 VP扫描电子显微镜观察。
结果
我们报道了一枚来自中国义县组的化石花芽，新属新种。它在义县组的出现为被子植物花的早期进化争论提供了第一手资料，并突显了义县组被子植物的高度多样性。
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