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Issue: Vol. 730 No. 1: 18 Nov. 2025
Type: Article
Published: 2025-11-18
DOI: 10.11646/phytotaxa.730.1.4
Page range: 62-74
Abstract views: 100
PDF downloaded: 2

Paradictyoarthrinium chiangmaiense (Paradictyoarthriniaceae, Pleosporales), a novel microfungus from northern Thailand

Center of Excellence in Microbial Diversity and Sustainable Utilization, Chiang Mai University, Chiang Mai 50200, Thailand; Center for Yunnan Plateau Biological Resources Protection and Utilization & Yunnan International Joint Laboratory of Fungal Sustainable Utilization in South and Southeast Asia, College of Biology and Food Engineering, Qujing Normal University, Qujing 655099, China; Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
Center for Yunnan Plateau Biological Resources Protection and Utilization & Yunnan International Joint Laboratory of Fungal Sustainable Utilization in South and Southeast Asia, College of Biology and Food Engineering, Qujing Normal University, Qujing 655099, China
Center of Excellence in Microbial Diversity and Sustainable Utilization, Chiang Mai University, Chiang Mai 50200, Thailand; Center for Yunnan Plateau Biological Resources Protection and Utilization & Yunnan International Joint Laboratory of Fungal Sustainable Utilization in South and Southeast Asia, College of Biology and Food Engineering, Qujing Normal University, Qujing 655099, China; Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
Center of Excellence in Microbial Diversity and Sustainable Utilization, Chiang Mai University, Chiang Mai 50200, Thailand; Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand; Office of Research Administration, Chiang Mai University, Chiang Mai 50200, Thailand
Germplasm Bank of Wild Species & Yunnan International Joint Laboratory of Fungal Sustainable Utilization in South and Southeast Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, Saudi Arabia
Center of Excellence in Biotechnology Research (CEBR), DSR, P.O. Box 10219, King Saud University, Riyadh, Saudi Arabia
Center for Yunnan Plateau Biological Resources Protection and Utilization & Yunnan International Joint Laboratory of Fungal Sustainable Utilization in South and Southeast Asia, College of Biology and Food Engineering, Qujing Normal University, Qujing 655099, China
Center of Excellence in Microbial Diversity and Sustainable Utilization, Chiang Mai University, Chiang Mai 50200, Thailand; Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand; Office of Research Administration, Chiang Mai University, Chiang Mai 50200, Thailand
Dictyoarthrinium-like fungus multigene phylogeny new species taxonomy tropical area Fungi

Abstract

During the investigation of saprobic microfungi in Chiang Mai Province, Thailand, a black fungal mass on dead wood was collected and isolated. Based on initial morphology, this fungus was tentatively identified as a Dictyoarthrinium-like taxon. Phylogenetic analyses of combined ITS, LSU, and rpb2 sequences revealed that it belongs to a new taxon in the genus Paradictyoarthrinium. This novel taxon exhibits morphological characteristics typical of Paradictyoarthrinium, with gregarious, black, powdery colonies featuring macronematous conidiophores and unevenly dictyoseptate, muriform conidia. Based on morphological features similar to those of closely related species, the pairwise homoplasy index (PHI) test was used as an additional method to assess the likelihood of homoplasy within the dataset. The results indicated no significant genetic recombination (Φw = 0.9938) between all closely related species and our collection. Therefore, we propose our collection as a new species, P. chiangmaiense, accompanied by a description, illustrations, and a phylogenetic tree to illustrate its placement within the genus.

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How to Cite

Chen, X.-M., Karunarathna, S.C., Zhang, X., Kumla, J., Yu, F., Alfagham, A.T., Elgorban, A.M., Tibpromma, S. & Suwannarach, N. (2025) Paradictyoarthrinium chiangmaiense (Paradictyoarthriniaceae, Pleosporales), a novel microfungus from northern Thailand. Phytotaxa 730 (1): 62–74. https://doi.org/10.11646/phytotaxa.730.1.4