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Naturwissenschaften

, Volume 101, Issue 8, pp 615–622 | Cite as

Cosmosperma polyloba gen. et sp. nov., a seed plant from the Upper Devonian of South China

  • Deming Wang
  • Le Liu
  • Meicen Meng
  • Jinzhuang Xue
  • Tuo Liu
  • Yun Guo
Original Paper

Abstract

Seed plants with ovules were abundant in the Late Devonian of Euramerica and they contribute significantly to our understanding of their early history. However, coeval ovules have been scarce in other regions of the world. Specimens of the seed plant Cosmosperma polyloba gen. et sp. nov. Wang et al. were recently obtained from the Upper Devonian (Famennian) Wutong Formation, at Fanwan Village, Changxing County, Zhejiang Province, China. This new seed plant has cupulate ovules, the uniovulate cupules with up to 16 distal segments and with minute spines on the outer surface, synangiate pollen organs bearing six to eight microsporangia fused only at the base, and planate and highly dissected pinnules in alternate arrangement. It differs from other Devonian seed plants mainly in the organization and position of the uniovulate and ornamented cupule, and in the highly dissected pinnules. Cosmosperma Wang et al. represents the first Devonian ovules recovered from China or eastern Asia and further illustrates the diversity of early spermatophytes. As for the Late Devonian seed plants, it is suggested that the pollen organs are synangiate and simple in organization, and the branches and leaves are generally planate.

Keywords

Cosmosperma Late Devonian Ovule Pinnule Pollen organ Seed plant 

Notes

Acknowledgments

The authors thank Qi D-L (Anhui Geological Survey, Hefei) and Xiong C-H (Peking University) for much help in fieldwork and James Basinger (University of Saskatchewan) for his invaluable advice. This work is supported by the National Natural Science Foundation of China (41172007) and the National Basic Research Program of China (2012CB821900) of the Ministry of Science and Technology of China.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Deming Wang
    • 1
  • Le Liu
    • 1
  • Meicen Meng
    • 2
  • Jinzhuang Xue
    • 1
  • Tuo Liu
    • 1
  • Yun Guo
    • 3
  1. 1.Key Laboratory of Orogenic Belts and Crustal Evolution, Department of GeologyPeking UniversityBeijingChina
  2. 2.Institute of GeologyChinese Academy of Geological SciencesBeijingChina
  3. 3.Department of Geology, School of Resource Environment and Earth ScienceYunnan UniversityKunmingChina

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