Three new species of Megasporia (Polyporales, Basidiomycota) from China

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Abstract

Megasporia is a newly established polypore genus characterized by resupinate fruiting bodies with big pores, a dimitic hyphal structure with generative hyphae bearing clamp connections, more or less dextrinoid and cyanophilous skeletal hyphae, cylindrical, hyaline, thin-walled, smooth basidiospores, and growth mostly on fallen angiosperm branches. Species number is extremely rich in subtropical and tropical Asia. Three new species, namely M. rimosa, M. tropica and M. yunnanensis are described from China, and their illustrated descriptions are given. Differences between these new species and phylogenetically related and morphologically similar species are discussed. A key to the known species of Megasporia is provided.

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The phylogenetic distribution of resupinate forms across the major clades of mushroom‐forming fungi (Homobasidiomycetes)

Manfred Binder, David S. Hibbett, Karl-Henrik Larsson … (2005)

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Global diversity and molecular systematics of Wrightoporia s.l. (Russulales, Basidiomycota)

J.J. Chen, B.K. Cui, Y.C. Dai (2015)

Wrightoporia accommodates polypores producing finely asperulate and amyloid basidiospores, and causing white rot. Thirty-nine species have been described or transferred to this genus; however, only a few species have been referred to molecular phylogeny. In this study, about 140 worldwide specimens of Wrightoporia s.l. were studied morphologically, and ITS and/or nLSU regions from 37 samples, representing 19 species, were sequenced for phylogenetic analysis. Six clades of Wrightoporia s.l. were recognized. The Wrightoporia s.str. clade includes W. avellanea, W. lenta (the generic type) and W. subavellanea. Three clades segregating from Wrightoporia s.str. were proposed separately as three new genera, namely Larssoniporia gen. nov., Pseudowrightoporia gen. nov. and Wrightoporiopsis gen. nov. Two other clades were named after Amylonotus and Amylosporus. According to phylogenetic and morphological evidence, species previously treated in Wrightoporia were transferred to Amylonotus, Amylosporus and the new genera, or were retained as members of Wrightoporia s.l. because no good solution for these species could be found so far. In addition, one new species in Larssoniporia, three new species in Pseudowrightoporia and two new species in Wrightoporiopsis were described. Identification keys to the six genera and species in Amylonotus, Amylosporus, Larssoniporia, Pseudowrightoporia, Wrightoporia and Wrightoporiopsis are provided, respectively.

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Taxonomy and phylogeny of the genus Megasporoporia and its related genera

Haijiao Li, Baokai Cui (2017)

Taxonomic and phylogenetic studies on Megasporoporia s.l. were carried out. Phylogenetic analysis based on ITS and nLSU sequences showed that Megasporoporia s.l. belonging to the core polyporoid clade, however, it is not monophyletic, and four clades were recognized. The Megasporoporia s.s. clade includes M. setulosa and two new species, M. bannaensis and M. minor spp. nov. Two monophyletic clades were segregated from Megasporoporia s.l., and two new genera were established. Megasporia gen. nov. is composed of M. cystidiolophora, M. ellipsoidea, M. hexagonoides, M. major, M. violacea, and two new species, M. guangdongensis and M. hengduanensis spp. nov. Megasporoporiella gen. nov. including M. cavernulosa, M. rhododendri, M. subcavernulosa, and two new species, M. lacerata and M. pseudocavernulosa spp. nov. Megasporoporia quercina grouped with Grammothele fuligo in the Grammothele clade, so it is transferred to Grammothele and a new combination, G. quercina, is proposed. The main morphological characters of Megasporoporia and the two new genera are discussed, and identification keys to the three genera are provided.