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Zosterophyllum spathulatum Li and Cai from the Lower Devonian of Yunnan Province, China, is Adoketophyton subverticillatum (Li and Cai) Li and Edwards, 1992, with a discussion of spatial–temporal distribution of Adoketophyton

Published online by Cambridge University Press:  22 July 2025

Pu Huang Open the ORCID record for Pu Huang [Opens in a new window]  and
Hourui Zhang
Pu Huang*
Affiliation:
State Key Laboratory of Palaeobiology and Stratigraphy, https://ror.org/019av8481Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, China
Hourui Zhang
Affiliation:
State Key Laboratory of Palaeobiology and Stratigraphy, https://ror.org/019av8481Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, China
*
Corresponding author: Pu Huang; Email: puhuang@nigpas.ac.cn
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Abstract

The late Silurian to Early Devonian floras in the South China Block provide important evidence for the radiation of early land plants, including the well-known Posongchong Formation and Xujiachong Formation of Yunnan Province and the Pingyipu Group of Sichuan Province. However, some taxa in these stratigraphic units are described on the basis of limited specimens, or even a single and/or poorly preserved specimen, and need further investigation. The re-investigation of specimen PB6458 from the Xujiachong Formation at the Xujiachong section near Xujiachong Village, Qujing City, Yunnan Province, which is the holotype of Zosterophyllum spathulatum Li and Cai, 1977, reveals some new characters of its strobilus, sporophylls, and sporangia and denies its assignment to Zosterophyllum Penhallow, 1892. Instead, this specimen should be assigned to Adoketophyton subverticillatum (Li and Cai) Li and Edwards, 1992. This taxonomic revision extends the paleogeographic distribution of Adoketophyton Li and Edwards, 1992 and further enhances this genus as one of the index fossils of Lower Devonian non-marine strata in the South China Block.

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Journal of Paleontology , First View , pp. 1 - 8
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© The Author(s), 2025. Published by Cambridge University Press on behalf of Paleontological Society

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Footnotes

Handling Editor: William DiMichele

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