New species and records of Helicosporium sensu lato from Taiwan, with a reflection on current generic circumscription

Abstract

This paper describes and illustrates five species of Helicosporium sensu lato, which represents the partial result of an investigation of fungal diversity associated with submerged wood and decaying culms of Miscanthus floridulus (Poaceae) from freshwater streams in Alishan area, Chiayi County, Taiwan, which was carried out during the years 2016 and 2017. Neohelicomyces longisetosus sp. nov. and Helicosporium flavidum sp. nov. are described and illustrated; the former is proposed based on molecular and morphological data, whereas the latter is based on morphology only. Pseudohelicomyces talbotii, a new record for Taiwan, is renamed as Parahelicomyces talbotii because the former genus was a homonym and thus illegitimate. The other six illegitimate Pseudohelicomyces species are transferred to Parahelicomyces as new combinations. Two other species, namely Acanthohelicospora guianensis and Neohelicosporium sympodiophorum, are also new records for Taiwan. A taxonomic key to Helicosporium sensu stricto is provided. Current generic circumscription of helicosporous taxa based on phylogeny is briefly discussed.

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Data availability

The authors declare that all data and materials as well as software application or custom code support their published claims and comply with field standards. The sequence data generated in this study are deposited in NCBI GenBank.

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Acknowledgments

We would like to thank Dr. Jie-Hao Ou for a discussion on the phylogeny of helicosporous fungi. We appreciate the two anonymous reviewers of this paper for giving us valuable comments and constructive input to our work. Mr. Chiao-Chih Chien and Mr. Liang-Yung Chen are thanked for their help in collecting plant materials in the field. Thanks are extended to Ms. Shing-Yu Lin and Ms. Hsin-Yi Peng for general technical support.

Funding

This research was financially supported by the Ministry of Science and Technology of Taiwan (Grant Number 108-2621-B-415-001) and the Ministry of Economic Affairs of Taiwan (Grant Number 109EC-17-A-22-0525).

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All authors contributed to the study conception and design. Funding was acquired by Sung-Yuan Hsieh and Chang-Hsin Kuo. Material preparation, data collection, and analysis were performed by Sung-Yuan Hsieh, Chang-Hsin Kuo, and Teik-Khing Goh. The first draft of the manuscript was written by Teik-Khiang Goh and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Chang-Hsin Kuo.

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Hsieh, SY., Goh, TK. & Kuo, CH. New species and records of Helicosporium sensu lato from Taiwan, with a reflection on current generic circumscription. Mycol Progress 20, 169–190 (2021). https://doi.org/10.1007/s11557-020-01663-8

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Keywords

  • Freshwater fungi
  • Helicosporous hyphomycetes
  • Mitosporic fungi
  • Taxonomy
  • Tubeufiaceae