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Our current understanding of the genus Pseudocosmospora (Hypocreales, Nectriaceae) in China

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Abstract

To explore species diversity of the genus Pseudocosmospora, collections from Beijing and Hubei Province of China were examined, and three undescribed species were encountered. Morphological features and DNA sequence analyses of the ITS, nc LSU rDNA, RPB1, and TUB regions support their placement in Pseudocosmospora and recognition of two new species. Pseudocosmospora curvispora sp. nov. encountered on fruiting bodies of a species of the Diatrypaceae has gregarious, subglobose to obpyriform perithecia seated directly on the host fungus clavate asci, with eight ellipsoidal, smooth ascospores, acremonium- to verticillium-like conidiophores, and strongly curved, allantoid, unicellular conidia. Pseudocosmospora shennongjiana sp. nov. is characterized by solitary to gregarious, subglobose to globose perithecia with a minute basal stroma clavate asci, containing eight ellipsoidal, spinulose ascospores, acremonium-like conidiophores, and rod-shaped, unicellular conidia. An unnamed species of the genus is also described. Distinctions between these species and their close relatives are compared in detail. The previously recorded species of the genus in China are briefly reviewed.

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Data availability

All specimens and strains are deposited in registered herbaria and culture collection center. Relevant data have been deposited in GenBank, Fungal Names, and TreeBASE.

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Acknowledgements

The authors would like to thank the anonymous reviewers and the editor for their valuable suggestions and linguistic corrections. We also thank Drs. Huan-Di Zheng, Wen-Tao Qin, and Kai Chen for collecting specimens for this study.

Funding

This work was supported by the National Natural Science Foundation of China (31750001, 31870012) and Frontier Key Program of Chinese Academy of Sciences (QYZDY-SSW-SMC029).

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Authors and Affiliations

  1. State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China

    Zhao-Qing Zeng & Wen-Ying Zhuang

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  1. Zhao-Qing Zeng
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  2. Wen-Ying Zhuang
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Contributions

Conceived and designed the experiments: Wen-Ying Zhuang. Performed the experiments: Zhao-Qing Zeng. Analyzed the data: Zhao-Qing Zeng and Wen-Ying Zhuang. Wrote the paper: Zhao-Qing Zeng and Wen-Ying Zhuang.

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Correspondence to Zhao-Qing Zeng or Wen-Ying Zhuang.

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Zeng, ZQ., Zhuang, WY. Our current understanding of the genus Pseudocosmospora (Hypocreales, Nectriaceae) in China. Mycol Progress 20, 419–429 (2021). https://doi.org/10.1007/s11557-021-01672-1

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