Yuhania: a unique angiosperm from the Middle Jurassic of Inner Mongolia, China.
Yuhania: a unique angiosperm from the Middle Jurassic of Inner Mongolia, China.
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Yuhania：中侏罗世内蒙古独特的被子植物
DOI：
10.1080/08912963.2016.1178740
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发表时间：
2017-05-19
影响因子：
1.4
通讯作者：
Wang X
中科院分区：
文献类型：
--
作者：
Liu ZJ;Wang X
尽管白垩纪前被子植物的说法越来越多，但在进一步的证据可用之前，侏罗纪是否真的存在被子植物显然对许多人来说仍然是一个悬而未决的问题。这个问题只能通过研究更多的侏罗纪植物化石来回答。本文报道了内蒙古中侏罗世被子植物Yuhania daohugouensis gen. et sp. nov化石。该植物包括相连的茎、叶、花、聚合的果实、小果实和小果实中的种子。叶片沿弯曲的茎螺旋状排列，呈线状，有5-6条平行脉。聚果有花梗，由20多个心皮/小果螺旋排列而成。每个小果实都包含一粒种子。在同一株植物中发现了不同阶段的生殖器官，让我们了解了Yuhania的发展。Yuhania在中侏罗世的出现再次证实了其他独立研究提出的被子植物的侏罗纪历史，并为正在进行的被子植物早期进化研究增添了新的内容。
Abstract Despite increasing claims of pre-Cretaceous angiosperms, whether there really are angiosperms in the Jurassic is apparently still an open question for many people before further evidence is available. This question can only be answered by studying more Jurassic plant fossils. Here we report a fossil angiosperm, Yuhania daohugouensis gen. et sp. nov, from the Middle Jurassic of Inner Mongolia, China. The plant includes connected stem, leaves, flowers, aggregate fruits, fruitlets, and seeds within fruitlets. The leaves are helically arranged along the curving stem, linear in shape, with 5–6 parallel veins. The aggregate fruit is pedicellate, composed of over 20 carpels/fruitlets helically arranged. Each fruitlet encloses a seed. The reproductive organs in various stages are found in the same plant, allowing us to understand the development of Yuhania. The occurrence of Yuhania in the Middle Jurassic re-confirms the Jurassic history for angiosperms that has been suggested by other independent research and adds to the on-going study on the early evolution of angiosperms.