A Novel Angiosperm from the Early Cretaceous and Its Implications for Carpel-Deriving
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We appreciate Mr. Yan Fang and Ms. Chunzhao Wang for help with SEM, Ms. Lijun Chen for the drawing. This research is supported by the Strategic Priority Research Program (B) of Chinese Academy of Sciences (XDB26000000) and National Natural Science Foundation of China (91514302, 91114201) awarded to X.W.; and State Forestry Administration of China (No. 2005–122), Science and Technology Project of Guangdong (No. 2011B060400011), and Special Funds for Environmental Projects of Shenzhen (No. 2013-02) awarded to Z. J. L.. We cordially thank two anonymous reviewers for spending their valuable time helping us to improve this manuscript.

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    Abstract:

    The Yixian Formation (Lower Cretaceous) of China is famous for its fossils of early angiosperms, and these fossils have shed otherwise unavailable light on the evolution of angiosperms. The seeds in Archaefructus and Nothodichocarpum are inserted along the dorsal of the fruits while those in Sinocarpus are along the ventral of the fruits, suggesting different Bau-plans and pathways deriving the carpels in these plants of the Early Cretaceous. Adding further fossil evidence, here we report a novel fossil angiosperm, Neofructus lingyuanensis gen. et sp. nov, with its seeds inserted on both ventral and dorsal sides of the fruits documented through light microscopic and SEM observations, suggesting a novel way forming gynoecium in the Yixian Formation. These fossil angiosperms indicate that angiosperm gynoecia in the Yixian Formation (the Barremian to Aptian) are derived in obviously different ways, implying an evolutionary scenario for angiosperms quite different from formerly assumed.

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LIU Zhongjian, WANG Xin.2018. A Novel Angiosperm from the Early Cretaceous and Its Implications for Carpel-Deriving[J]. Acta Geologica Sinica(),92(4):1293-1298

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History
  • Received:February 02,2018
  • Revised:April 12,2018
  • Adopted:
  • Online: August 21,2018
  • Published: