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Issue: Vol. 483 No. 2: 10 February 2021
Type: Article
Published: 2021-02-10
DOI: 10.11646/phytotaxa.483.2.5
Page range: 129–138
Abstract views: 18
PDF downloaded: 1

Rhexodenticula aquatica (Sordariomycetidae genera incertae sedis), a novel hyphomycete from freshwater in Thailand

Department of Entomology and Plant Pathology, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand
Faculty of Agriculture and Food, Kunming University of Science & Technology, Kunming 650500, China
Institute of Plant Health, Zhongkai University of Agriculture and Engineering, Haizhu District, Guangzhou 510225, China Research Center of Microbial Diversity and Sustainable Utilization, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu 611731, China
Faculty of Environmental Science and Engineering, Kunming University of Science & Technology, Kunming 650500, China
Department of Entomology and Plant Pathology, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand Innovative Agriculture Research Center, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand
Asexual fungi Multigene phylogeny Schizolytic Submerged wood Taxonomy Fungi

Abstract

During our surveys of freshwater fungi on submerged wood in the Greater Mekong Subregion, a rhexodenticula-like taxon was collected, described and illustrated. The new collection is identified based on analyses of combined LSU, SSU, ITS and TEF sequence data, and morphological comparison with other Rhexodenticula species. According to the morphology and molecular analysis, our collection is not known before and hence, we introduce here as Rhexodenticula aquatica sp. nov. This species is characterized by macronematous, subcylindrical, unbranched conidiophores, polyblastic, terminal conidiogenous cells and fusiform, 3-septate, verruculose conidia, and schizolytic conidial secession. Rhexodenticula is referred to Sordariomycetidae genera incertae sedis due to its unstable phylogenetic placement in Sordariomycetidae.