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Issue: Vol. 737 No. 3: 14 Jan. 2026
Type: Article
Published: 2026-01-14
DOI: 10.11646/phytotaxa.737.3.4
Page range: 165-177
Abstract views: 38
PDF downloaded: 1

Pseudotetraploa sexualis sp. nov., a lignicolous freshwater fungi from Wenshan, Yunnan Province, China

College of Agriculture and Biological Science, Dali University, Dali 671003, Yunnan, P.R. China
College of Agriculture and Biological Science, Dali University, Dali 671003, Yunnan, P.R. China
College of Agriculture and Biological Science, Dali University, Dali 671003, Yunnan, P.R. China
College of Agriculture and Biological Science, Dali University, Dali 671003, Yunnan, P.R. China; Co-Innovation Center for Cangshan Mountain and Erhai Lake Integrated Protection and Green Development of Yunnan Province, Dali University, Dali 671003, Yunnan, P.R. China
College of Agriculture and Biological Science, Dali University, Dali 671003, Yunnan, P.R. China
Tetraplosphaeriaceae morphology phylogeny taxonomy 1 new species Fungi

Abstract

Lignicolous freshwater fungi are a highly diverse group that play an important role in freshwater ecosystems. During the investigation of species resources of lignicolous freshwater fungi in the Wenshan Autonomous Prefecture, Yunnan Province, a sexual fungus was isolated from submerged decayed wood. Based on morphological observations and phylogenetic analysis of combined LSU, ITS, SSU, and tub2 sequence data, a new species, Pseudotetraploa sexualis sp. nov., is proposed. Notably, this represents the first sexual morph reported for the genus Pseudotetraploa, distinguished by its semi-immersed to immersed, subglobose to globose ascomata with a cylindrical beak; peridium composed of textura angularis to textura prismatica cells; filamentous, septate pseudoparaphyses; bitunicate, fissitunicate, 8-spored, clavate to cylindric-clavate asci with a rounded apex and an ocular chamber; narrowly fusiform, hyaline to olive-brown, uniseptate, guttulate ascospores with acute or obtuse ends, surrounded by a mucilaginous sheath. A detailed description and illustration of the species are provided herein.

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How to Cite

Liu, T.-X., Wang, W.-P., Shen, H.-W., Luo, Z.-L. & Feng, Y. (2026) Pseudotetraploa sexualis sp. nov., a lignicolous freshwater fungi from Wenshan, Yunnan Province, China. Phytotaxa 737 (3): 165–177. https://doi.org/10.11646/phytotaxa.737.3.4