Latest Articles from MycoKeys Latest 5 Articles from MycoKeys https://mycokeys.pensoft.net/ Thu, 28 Mar 2024 22:05:51 +0200 Pensoft FeedCreator https://mycokeys.pensoft.net/i/logo.jpg Latest Articles from MycoKeys https://mycokeys.pensoft.net/ Delimitation, new species and teleomorph-anamorph relationships in Codinaea, Dendrophoma, Paragaeumannomyces and Striatosphaeria (Chaetosphaeriaceae) https://mycokeys.pensoft.net/article/57824/ MycoKeys 74: 17-74

DOI: 10.3897/mycokeys.74.57824

Authors: Martina Réblová, Jana Nekvindová, Jacques Fournier, Andrew N. Miller

Abstract: The Chaetosphaeriaceae are a diverse group of pigmented, predominantly phialidic hyphomycetes comprised of several holomorphic genera including Chaetosphaeria, the most prominent genus of the family. Although the morphology of the teleomorphs of the majority of Chaetosphaeria is rather uniform, their associated anamorphs primarily exhibit the variability and evolutionary change observed in the genus. An exception from the morphological monotony among Chaetosphaeria species is a group characterised by scolecosporous, hyaline to light pink, multiseptate, asymmetrical ascospores and a unique three-layered ascomatal wall. Paragaeumannomyces sphaerocellularis, the type species of the genus, exhibits these morphological traits and is compared with similar Chaetosphaeria with craspedodidymum- and chloridium-like synanamorphs. Morphological comparison and phylogenetic analyses of the combined ITS-28S sequences of 35 isolates and vouchers with these characteristics revealed a strongly-supported, morphologically well-delimited clade in the Chaetosphaeriaceae containing 16 species. The generic name Paragaeumannomyces is applied to this monophyletic clade; eight new combinations and five new species, i.e. P. abietinus sp. nov., P. elegans sp. nov., P. granulatus sp. nov., P. sabinianus sp. nov. and P. smokiensis sp. nov., are proposed. A key to Paragaeumannomyces is provided. Using morphology, cultivation studies and phylogenetic analyses of ITS and 28S rDNA, two additional new species from freshwater and terrestrial habitats, Codinaea paniculata sp. nov. and Striatosphaeria castanea sp. nov., are described in the family. A codinaea-like anamorph of S. castanea forms conidia with setulae at each end in axenic culture; this feature expands the known morphology of Striatosphaeria. A chaetosphaeria-like teleomorph is experimentally linked to Dendrophoma cytisporoides, a sporodochial hyphomycete and type species of Dendrophoma, for the first time.

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Research Article Mon, 19 Oct 2020 16:50:49 +0300
Type studies of Rossbeevera bispora, and a new species of Rossbeevera from south China https://mycokeys.pensoft.net/article/32775/ MycoKeys 51: 15-28

DOI: 10.3897/mycokeys.51.32775

Authors: Md. Iqbal Hosen, Xiang-Jing Zhong, Genevieve Gates, Takamichi Orihara, Tai-Hui Li

Abstract: The type of Rossbeevera bispora and additional collections from the type location and adjacent areas were studied. Molecular data for R. bispora derived from the new collections are provided. In addition, R. griseobrunnea, a new species of Rossbeevera, is described from Xiangtoushan National Nature Reserve, Guangdong Province of China. The new species is characterized by its globose to subglobose sequestrate basidiomata with grayish white to grayish brown pileus, pale bluish discoloration in some parts of the hymenophore when injured becoming rusty brown to dark brown after being exposed to the air, fusoid (star-shaped in cross section) basidiospores 17–20 × 9–12 μm, and subcutis elements in the pileus. Based on multi-locus (ITS+nrLSU+tef1-α+rpb2) molecular phylogenetic analyses, both species appear as sister to R. paracyanea. We present color photos, macro- and micro-description, SEM basidiospores, molecular affinities of the species and compare them with morphologically similar taxa within the genus. A key to the species known from northern and southern hemispheres is provided.

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Research Article Mon, 15 Apr 2019 13:48:09 +0300
New species in Cortinarius section Cortinarius (Agaricales) from the Americas and Australasia https://mycokeys.pensoft.net/article/5409/ MycoKeys 11: 1-21

DOI: 10.3897/mycokeys.11.5409

Authors: Emma Harrower, Neale L. Bougher, Caitlin Winterbottom, Terry W. Henkel, Egon Horak, P. Brandon Matheny

Abstract: Five new species from Cortinarius sect. Cortinarius are formally described, four from the Americas (Cortinarius palatinus Harrower, sp. nov., Cortinarius atrotomentosus Harrower, sp. nov., Cortinarius altissimus Harrower & T.W. Henkel, sp. nov., Cortinarius neotropicus Harrower, sp. nov.) and one from Australasia (Cortinarius carneipallidus Harrower & E. Horak, sp. nov.) based on molecular, morphological, and ecological circumscription. Additional collections of the Australasian species Cortinarius hallowellensis Wood and Cortinarius kioloensis Wood reveal wider host associations and geographic ranges than previously recorded. Morphological descriptions, photomicrographs and a dichotomous key to all species in Cortinarius sect. Cortinarius are provided. This work raises the number of species in sect. Cortinarius to twelve.

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Research Article Thu, 3 Sep 2015 09:59:29 +0300
Three new species of foetid Gymnopus in New Zealand https://mycokeys.pensoft.net/article/1199/ MycoKeys 7: 31-44

DOI: 10.3897/mycokeys.7.4710

Authors: Jerry Cooper, Pat Leonard

Abstract: We describe three new species, Gymnopus imbricatus, G. ceraceicola and G. hakaroa, from New Zealand that are similar to G. foetidus (= Micromphale foetidum), growing on wood, with an insititious stipe and foetid odour. The position of these species within the /gymnopoid clade is confirmed by ITS sequence analysis.

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Research Article Wed, 26 Jun 2013 00:00:00 +0300
Boletopsis nothofagi sp. nov. associated with Nothofagus in the Southern Hemisphere https://mycokeys.pensoft.net/article/1184/ MycoKeys 3: 13-22

DOI: 10.3897/mycokeys.3.2762

Authors: Jerry Cooper, Patrick Leonard

Abstract: Boletopsis nothofagi sp. nov., an ectomycorrhizal taxon is described from Nothofagus forests in New Zealand. A comparison of available molecular ITS sequences, and morphological data was carried out to confirm the novelty of the taxon. This is the first report of the genus in the Southern Hemisphere.

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Research Article Mon, 9 Apr 2012 00:00:00 +0300