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Issue: Vol. 437 No. 2: 25 March 2020
Type: Article
Published: 2020-03-25
DOI: 10.11646/phytotaxa.437.2.1
Page range: 51–59
Abstract views: 37
PDF downloaded: 34

Heteroradulum yunnanensis sp. nov. (Auriculariales, Basidiomycota) evidenced by morphological characters and phylogenetic analyses in China

Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China, Ministry of Education, Southwest Forestry University, Kunming 650224, P.R. China College of Biodiversity Conservation, Southwest Forestry University, Kunming 650224, P.R. China
College of Biodiversity Conservation, Southwest Forestry University, Kunming 650224, P.R. China
Wenshan Forestry Research Institute, Wenshan, Yunnan 663300, P.R. China
Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China, Ministry of Education, Southwest Forestry University, Kunming 650224, P.R. China College of Biodiversity Conservation, Southwest Forestry University, Kunming 650224, P.R. China Key Laboratory of Forest Disaster Warning and Control of Yunnan Province, Southwest Forestry University, Kunming 650224, P.R. China
Exidiopsis phylogeny taxonomy wood-inhabiting fungi Yunnan Province Fungi

Abstract

A new wood-inhabiting fungal species, Heteroradulum yunnanensis, is proposed based on a combination of morphological features and molecular evidence. The species is characterized by an annual growth habit, resupinate basidiomata with odontoid hymenial surface (50–100 µm long), more or less pronounced yellow stains in older basidiomata, a monomitic hyphal system with thin-walled, clamped generative hyphae and two to three-celled basidia and cylindrical, hyaline, thin-walled, smooth, IKI–, CB– basidiospores measuring as 17–24 ×5–8 µm. Sequences of ITS and LSU nrRNA gene regions of the studied samples were generated, and phylogenetic analyses were performed with maximum likelihood, maximum parsimony and bayesian inference methods. The phylogenetic analyses based on molecular data of ITS+nLSU sequences showed that Heteroradulum yunnanensis formed a monophyletic lineage with a strong support (100% BS, 100% BP, 1.00 BPP) and then grouped with H. adnatum.