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New materials of Drepanophycus from the Middle Devonian Haikou Formation of Qujing,Yunnan,China and their Palaeoenvironmental implications
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Jingyu ZHAO1, Yahui BU1, Qingyuan XUE1, Lu LIU2, Huiping PENG3, Jiajia SHEN4, Pu HUANG3
Journal of Palaeogeography (Chinese Edition) | 2026, 28(2) : 740 - 754
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Journal of Palaeogeography (Chinese Edition) | 2026, 28(2): 740-754
• BIOPALAEOGEOGRAPHY AND PALAEOECOLOGY •
New materials of Drepanophycus from the Middle Devonian Haikou Formation of Qujing,Yunnan,China and their Palaeoenvironmental implications
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Jingyu ZHAO1, Yahui BU1, Qingyuan XUE1, Lu LIU2, Huiping PENG3, Jiajia SHEN4, Pu HUANG3
Affiliations
  • 1 School of Resources and Civil Engineering,Suzhou University,Anhui Suzhou 234000,China
  • 2 Natural History Museum of China,Beijing 100050,China
  • 3 State Key Laboratory of Palaeobiology and Stratigraphy,Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences,Nanjing 210008,China
  • 4 Institute of Paleontology,Yunnan University,Kunming 650500,China

    • ZHAO Jingyu,born in 1988,is a lecturer. He is engaged in scientific researches and teaching of earth science. E-mail: .

About Author:

ZHAO Jingyu,born in 1988,is a lecturer. He is engaged in scientific researches and teaching of earth science. E-mail: .

Published: 2026-04-01 doi: 10.7605/gdlxb.2026.025
Outline
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Drepanophycus is one of the representative early lycopsids,with a global distribution spanning from the Early to Late Devonian. New materials of Drepanophycus from the Middle Devonian Haikou Formation at the Taihe section of Qujing,Yunnan,are described and identified as Drepanophycus qujingensis Li et Edwards. Vegetative axes are preserved as lying flat or penetrating the bedding plane,with a length up to 172.0 mm. Triangular and falcate leaves,approximately 4.6 mm long,are sparsely arranged on the axes. The stomatal type observed in the cuticle of this plant is anomocytic. Research history of Drepanophycus records in China is reviewed,and taxonomic characteristics of this genus is summarized. New specimen of Drepanophycus Göppert,along with a re-examination of previous works,provides solid evidence for the occurrence of this genus in the Middle Devonian of South China. The Middle Devonian flora of South China includes both elements of the “Eophytic Flora”,such as the early lycopsid Drepanophycus and basal euphyllophytes,as well as those of the “Palaeophytic Flora”including heterosporous lycopsids and fern-like plants. Additionally,well-developed paleosols are observed in the same Haikou Formation of the same locality,in which rhizomes possibly belonging to Drepanophycus are preserved. This finding indicates that herbaceous lycopsids could have played a crucial role in soil stabilization,erosion mitigation and landscape shaping during the Middle Devonian.

South China Block  /  Middle Devonian  /  Haikou Formation  /  Xichong Formation  /  Drepanophycus qujingensis  /  paleosol  /  palaeoenvironment
赵景宇, 卜亚辉, 薛清元, 刘璐, 彭辉平, 申佳佳, 黄璞. 云南曲靖中泥盆统海口组Drepanophycus(镰蕨属)新材料及其古环境意义*. 古地理学报, 2026 , 28 (2) : 740 -754 . DOI: 10.7605/gdlxb.2026.025
Jingyu ZHAO, Yahui BU, Qingyuan XUE, Lu LIU, Huiping PENG, Jiajia SHEN, Pu HUANG. New materials of Drepanophycus from the Middle Devonian Haikou Formation of Qujing,Yunnan,China and their Palaeoenvironmental implications[J]. Journal of Palaeogeography (Chinese Edition), 2026 , 28 (2) : 740 -754 . DOI: 10.7605/gdlxb.2026.025
Funding
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  • National Natural Science Foundation of China(42472028)
  • program for Basic Geology,Suzhou University Scientific Center(2021XJPT55)
  • Pratice Project of Anhui University Students Innovation and Entrepreneurship Training Program(S202510379064)
Appendix
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Year 2026 volume 28 Issue 2
154
67
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Article Info
doi: 10.7605/gdlxb.2026.025
  • Receive Date：2025-05-25
  • Online Date：2026-09-24
  • Published：2026-04-01
Article Data
Affiliations
History
  • Received：2025-05-25
  • Revised：2025-08-20
Funding
National Natural Science Foundation of China(42472028)
program for Basic Geology,Suzhou University Scientific Center(2021XJPT55)
Pratice Project of Anhui University Students Innovation and Entrepreneurship Training Program(S202510379064)
Affiliations
    1 School of Resources and Civil Engineering,Suzhou University,Anhui Suzhou 234000,China
    2 Natural History Museum of China,Beijing 100050,China
    3 State Key Laboratory of Palaeobiology and Stratigraphy,Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences,Nanjing 210008,China
    4 Institute of Paleontology,Yunnan University,Kunming 650500,China

Corresponding:

HUANG Pu,born in 1987,is an associate professor. He is engaged in researches on evolution of early land plants and environments. E-mail: .
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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