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Issue: Vol. 447 No. 4: 11 June 2020
Type: Article
Published: 2020-06-11
DOI: 10.11646/phytotaxa.447.4.3
Page range: 252–264
Abstract views: 29
PDF downloaded: 1

Triseptata sexualis gen. et sp. nov. in Latoruaceae (Pleosporales)

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.
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.
Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Science, Kunming 650201, Yunnan, People’s Republic of China.
Center of Excellence in Biotechnology Research, King Saud University P.O. Box. 2455, Riyadh 11451, Saudi Arabia. Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box: 2455, Riyadh, 1145, Saudi Arabia.
Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand. Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Science, Kunming 650201, Yunnan, People’s Republic of China.
2 new taxa bitunicate lignicolous fungi phylogeny taxonomy Fungi

Abstract

A survey of lignicolous terrestrial ascomycetes conducted in Thailand yielded a number of novel species. In this paper, we report on a terrestrial collection of a taxon from dead branches of an unidentified plant. Triseptata gen. et sp. nov. is characterized by immersed, uni- to multi-loculate ascomata, filamentous pseudoparaphyses, bitunicate, fissitunicate, cylindrical-clavate asci and 3-septate, light brown spores, with asymmetrical ends, in its sexual form. In culture, it produced hyphomycetous, globose to subglobose, multi-septate and darkly pigmented conidia-like structures. Phylogenetic analysis of a combined LSU, ITS and SSU dataset shows Triseptata to be a well-separated lineage from all genera in Latoruaceae. Based on multigene phylogeny, Triseptata gen. nov. is introduced to accommodate a single new species Triseptata sexualis and placed in Latoruaceae. Illustrations, descriptions and notes are provided for the new genus and species.