Browsing by Subject "Heterobasidiomycetes"

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  • Malysheva, Vera; Spirin, Viacheslav; Miettinen, Otto; Kout, Jiří; Savchenko, Anton; Larsson, Karl-Henrik (2019)
    In the present paper, we select a neotype for Tremella cerasi and prove that it is conspecific with Ditangium insigne (the genus type of Ditangium). We argue that Ditangium should be restored as a correct genus for T. cerasi, while the currently used generic name Craterocolla is to be treated as its younger synonym. Morphological, ecological and genetic variability of Ditangium cerasi is discussed, and two other Ditangium species are described—D. altaicum, sp. nov. and D. incarnatum, comb. nov. In addition, Exidia fulva is combined in Globulisebacina.
  • Spirin, Viacheslav; Malysheva, Vera; Miettinen, Otto; Vlasak, Josef; Mendes Alvarenga, Renato Lucio; Gibertoni, Tatiana Baptista; Ryvarden, Leif; Larsson, Karl-Henrik (2019)
    The taxonomy of Protomerulius and Heterochaetella is revised based on DNA data and morphological evidence, and their type species, P. brasiliensis and H. dubia, are proved to be congeneric. As a consequence, H. dubia and related species, of which four are described as new, are placed in Protomerulius. Heterochaete microspora is also combined in Protomerulius, and the genus concept is redefined to encompass effused species with smooth or spiny hymenophore and monomitic hyphal structure. Psilochaete multifora, gen. and spec. nov. is a distant relative of Protomerulius spp. found in Norway. Heterochaetella cystidiophora is re-collected in Brazil and placed in the synonyms of Heterochaete sanctae-catharinae. This species does not belong to the Protomerulius-Heterochaetella lineage, and it is transferred to Metulochaete, gen. nov.
  • Malysheva, Vera; Spirin, Viacheslav; Miettinen, Otto; Motato-Vasquez, Viviana; Hernawati,; Seelan, Jaya Seelan Sathiya; Larsson, Karl-Henrik (2018)
    Three species currently addressed to Protohydnum (Auriculariales) are studied with morphological and DNA methods. The genus Protohydnum is retained for the type species only, P. cartilagineum, recently re-collected in Brazil. The European species, P. piceicola, is not congeneric with P. cartilagineum and, therefore, placed in its own genus, Hyalodon, gen. nov. Another Hyalodon species, H. antui, is described from East Asia. The third member of Protohydnum sensu lato, P. sclerodontium from South-East Asia, is transferred to Elmerina.
  • Spirin, Viacheslav; Malysheva, Vera; Schoutteten, Nathan; Viner, Ilya; Miettinen, Otto; Nordén, Jenni; Ryvarden, Leif; Kotiranta, Heikki; Verbeken, Annemieke; Weiss, Michael; Larsson, Karl-Henrik (2021)
    Taxonomy of Basidiodendron caesiocinereum complex is revised based on morphological and molecular methods (with the use of nc LSU rDNA, ITS and TEF1 regions). The basidiospore ornamentation is justified as a key morphological character for the species recognition in the group. As redefined here, B. caesiocinereum is an angiosperm-dwelling species with smooth basidiospores. Bourdotia cinerella and B. cinerella var. trachyspora are proved to represent separate species with warted basidiospores; they are reintroduced as Basidiodendron cinerellum and B. trachysporum. Additionally, eight new species related to B. caesiocinereum are described based on material from Eurasia, North America and Africa, and identity of B. spinosum from Oceania is discussed.
  • Spirin, Viacheslav; Malysheva, Vera; Haelewaters, Danny; Larsson, Karl-Henrik (2019)
    Stypella vermiformis is a heterobasidiomycete producing minute gelatinous basidiocarps on rotten wood of conifers in the Northern Hemisphere. In the current literature, Stypella papillata, the genus type of Stypella (described from Brazil), is treated as a taxonomic synonym of S. vermiformis. In the present paper, we revise the type material of S. papillata and a number of specimens addressed to S. vermiformis. As a result, the presumed synonymy of S. papillata and S. vermiformis is rejected and the genus Stypella is restricted to the single species S. papillata. Morphological and molecular phylogenetic studies of specimens from the Northern Hemisphere corresponding to the current concept of S. vermiformis uncovered three species from two newly described genera. S. vermiformis s.str. is distributed in temperate Europe and has small-sized basidia and basidiospores, and it is placed in a new genus, Mycostilla. Another genus, Stypellopsis, is created for two other species, the North American Stypellopsis farlowii, comb. nov., and the North European Stypellopsis hyperborea, sp. nov. Basidia and basidiospores of Stypellopsis spp. are larger than in Mycostilla vermiformis but other morphological characters are very similar. In addition, Spiculogloea minuta (Spiculogloeomycetes, Pucciniomycotina) is reported as new to Norway, parasitising basidiocarps of M. vermiformis and Tulasnella spp.
  • Malysheva, Vera; Spirin, Viacheslav (2017)
    In the present study, we investigate taxonomy of the Auriculariales with effused or cupulate, persistent basidiocarps; generic and species concepts are revised based on morphological and DNA evidences. The genus Eichleriella is reinstated to embrace ten closely related species with ellipsoid-ovoid basidia, and the genus type, Eichleriella incarnata, is placed to the synonyms of Eichleriella leucophaea. Eichleriella bactriana, Eichleriella desertorum and Eichleriella sicca are described as new to science. In addition, four species earlier treated as members of Exidiopsis or Heterochaete are combined to the genus. The genus name Heteroradulum (type Radulum kmetii) is introduced for seven species with large, obconical, stipitate basidia. Of them, Heteroradulum adnatum and Heteroradulum semis are described as new. Two new genera, Amphistereum (with two species, type Eichleriella schrenkii) and Sclerotrema (monotypic, type Exidiopsis griseobrunnea), are proposed; Hirneolina (monotypic, type H. hirneoloides) and Tremellochaete (with two species, type Exidia japonica) are restored as good genera. The type species of Heterochaete, H. andina, is congeneric with Exidiopsis (type E. effusa). 2017 British Mycological Society. Published by Elsevier Ltd. All rights reserved.