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Issue: Vol. 710 No. 2: 15 Jul. 2025
Type: Article
Published: 2025-07-15
DOI: 10.11646/phytotaxa.710.2.2
Page range: 165-183
Abstract views: 282
PDF downloaded: 11

Integrative taxonomy reveals Pseudokeissleriella tetradii sp. nov. (Lentitheciaceae, Pleosporales) associated with Tetradium ruticarpum in Anhui Province, China

Bioengineering and Technological Research Centre for Edible and Medicinal Fungi, Jiangxi Agricultural University, Nanchang 330045, P.R. China; Nanchang Key Laboratory of Edible and Medicinal Fungi, Jiangxi Agricultural University, Nanchang 330045, P.R. China; Jiangxi Key Laboratory for Excavation and Utilization of Agricultural Microorganisms, Jiangxi Agricultural University, Nanchang 330045, P.R. China; Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand; School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand
Bioengineering and Technological Research Centre for Edible and Medicinal Fungi, Jiangxi Agricultural University, Nanchang 330045, P.R. China; Nanchang Key Laboratory of Edible and Medicinal Fungi, Jiangxi Agricultural University, Nanchang 330045, P.R. China; Jiangxi Key Laboratory for Excavation and Utilization of Agricultural Microorganisms, Jiangxi Agricultural University, Nanchang 330045, P.R. China
School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand
Bioengineering and Technological Research Centre for Edible and Medicinal Fungi, Jiangxi Agricultural University, Nanchang 330045, P.R. China; Nanchang Key Laboratory of Edible and Medicinal Fungi, Jiangxi Agricultural University, Nanchang 330045, P.R. China; Jiangxi Key Laboratory for Excavation and Utilization of Agricultural Microorganisms, Jiangxi Agricultural University, Nanchang 330045, P.R. China
coelomycetous taxon Dothideomycetes endophytic fungi new taxa phylogeny taxonomy Fungi

Abstract

Tetradium ruticarpum, a well-known medicinal plant in China, is widely used in traditional medicine to treat pain and gastrointestinal disorders due to its diverse bioactive components. During a fungal survey of T. ruticarpum in Anhui Province, China, a novel coelomycetous species, Pseudokeissleriella tetradii was isolated and characterized. The new species is morphologically distinguished by dark brown to black, globose conidiomata; cylindrical, aseptate conidiophores; holoblastic conidiogenous cells; and hyaline, aseptate, cylindrical to subcylindrical, guttulate conidia. Phylogenetic analyses based on a combined SSU, ITS, LSU, and tef1-α sequences, placed the taxon within Pseudokeissleriella as a sister species to the bamboo-inhabiting Ps. bambusicola (SH-aLRT/UFBoot/BPP = 95.7/96/1.0). Distinct morphological traits and interspecific genetic differences support its recognition as a new species. The discovery expands the known host range of Pseudokeissleriella beyond bamboo and highlights the unexplored fungal associate with medicinal plants. A detailed description, illustrations, phylogenetic analysis results, and genetic comparisons are provided.

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How to Cite

Mi, L.-X., Song, H.-Y., Eungwanichayapant, P.D. & Hu, D.-M. (2025) Integrative taxonomy reveals Pseudokeissleriella tetradii sp. nov. (Lentitheciaceae, Pleosporales) associated with Tetradium ruticarpum in Anhui Province, China. Phytotaxa 710 (2): 165–183. https://doi.org/10.11646/phytotaxa.710.2.2