Fossil record of Ceratophyllum aff. muricatum Cham. (Ceratophyllaceae) from the middle Eocene of central Tibetan Plateau, China
Fossil record of Ceratophyllum aff. muricatum Cham. (Ceratophyllaceae) from the middle Eocene of central Tibetan Plateau, China
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DOI：
10.1016/j.revpalbo.2020.104284
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发表时间：
2020-10-01
影响因子：
1.9
通讯作者：
Su, Tao
中科院分区：
文献类型：
--
作者：
Del Rio, Cedric;Wang, Teng-Xiang;Su, Tao
金鱼藻科是被子植物中的一个世界性沉水植物科。化石记录主要由北方半球白垩纪至新近纪的果实组成。然而，它在亚洲的化石记录很少。在这里，我们报告的化石水果归因于金鱼藻aff。[医]毛叶藓产于青藏高原中部班戈尔县牛堡组中始新世早期。这是亚洲最早的金鱼藻科化石记录，表明始新世期间金鱼藻从北美分散到亚洲，分布范围比以前认为的要广得多。此外，这一化石记录表明，沉积地点对应于浅水环境。气候为热带至亚热带，与同一地点发现的其他化石的环境条件一致。另外，青藏高原中部晚第三纪的形成，使其气候条件与现今截然不同。(C)2020年由Elsevier B.V.发布
Ceratophyllaceae Gray is a cosmopolitan submersed family in angiosperm. The fossil record is mainly composed of fruits ranging in age from the Cretaceous to the Neogene within the Northern Hemisphere. However, its fossil record in Asia is sparse. Here we report on a fossil fruit attributed to Ceratophyllum aff. muricatum Cham. from the early middle Eocene of the Niubao Formation in Bangor County, central Tibetan Plateau, China, which is characterized by marginal lateral spines, a style and two basal spines and a small smooth, possibly warty body. This is the earliest fossil record of Ceratophyllaceae in Asia, and it indicates a dispersion from North America to Asia as well as a much wider distribution of Ceratophyllum during the Eocene than previously thought. Moreover, this fossil record demonstrates that the depositional site corresponds to a shallow freshwater environment. The climate was tropical to sub-tropical, consistent with environmental conditions of other fossils findings in the same site. Besides, the climate condition was totally different from the present, largely due to the Neogene formation of central Tibetan Plateau. (C) 2020 Published by Elsevier B.V.