Latest Articles from MycoKeys Latest 3 Articles from MycoKeys https://mycokeys.pensoft.net/ Thu, 28 Mar 2024 12:44:38 +0200 Pensoft FeedCreator https://mycokeys.pensoft.net/i/logo.jpg Latest Articles from MycoKeys https://mycokeys.pensoft.net/ Longistriata flava (Boletaceae, Basidiomycota) – a new monotypic sequestrate genus and species from Brazilian Atlantic Forest https://mycokeys.pensoft.net/article/39699/ MycoKeys 62: 53-73

DOI: 10.3897/mycokeys.62.39699

Authors: Marcelo A. Sulzbacher, Takamichi Orihara, Tine Grebenc, Felipe Wartchow, Matthew E. Smith, María P. Martín, Admir J. Giachini, Iuri G. Baseia

Abstract: A new monotypic sequestrate genus, Longistriata is described based on collections from the Neotropical forest of Atlantic forest in Paraíba, Northeast Brazil – an area known for its high degree of endemism. The striking features of this new fungus are the hypogeous habit, the vivid yellow peridium in mature basidiomes, broadly ellipsoid basidiospores with a distinct wall that is ornamented with longitudinal striations and lageniform cystidia with rounded apices. Phylogenetic analysis, based on LSU and tef-1α regions, showed that the type species, Longistriata flava, is phylogenetically sister to the monotypic sequestrate African genus Mackintoshia in Boletaceae. Together these two species formed the earliest diverging lineage in the subfamily Zangioideae. Longistriata flava is found in nutrient-poor white sand habitats where plants in the genera Coccoloba (Polygonaceae) and Guapira (Nyctaginaceae) are the only potential ectomycorrhizal host symbionts.

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Research Article Mon, 3 Feb 2020 16:39:34 +0200
More pieces to a huge puzzle: Two new Escovopsis species from fungus gardens of attine ants https://mycokeys.pensoft.net/article/30951/ MycoKeys 46: 97-118

DOI: 10.3897/mycokeys.46.30951

Authors: Quimi Vidaurre Montoya, Maria Jesus Sutta Martiarena, Danilo Augusto Polezel, Sérgio Kakazu, Andre Rodrigues

Abstract: Escovopsis (Ascomycota: Hypocreales, Hypocreaceae) is the only known parasite of the mutualistic fungi cultivated by fungus-growing ants (Formicidae: Myrmicinae: Attini: Attina, the “attines”). Despite its ecological role, the taxonomy and systematics of Escovopsis have been poorly addressed. Here, based on morphological and phylogenetic analyses with three molecular markers (internal transcribed spacer, large subunit ribosomal RNA and the translation elongation factor 1-alpha), we describe Escovopsis clavatus and E. multiformis as new species isolated from fungus gardens of Apterostigma ant species. Our analysis shows that E. clavatus and E. multiformis belong to the most derived Escovopsis clade, whose main character is the presence of conidiophores with vesicles. Nevertheless, the most outstanding feature of both new species is the presence of a swollen region in the central hypha of the conidiophore named swollen cell, which is absent in all previously described Escovopsis species. The less derived Escovopsis clades lack vesicles and their phylogenetic position within the Hypocreaceae still remains unclear. Considering the high genetic diversity in Escovopsis, the description of these new species adds barely two pieces to a huge taxonomic puzzle; however, this discovery is an important piece for building the systematics of this group of fungi.

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Research Article Mon, 18 Feb 2019 09:48:30 +0200
Reclassification of Parapterulicium Corner (Pterulaceae, Agaricales), contributions to Lachnocladiaceae and Peniophoraceae (Russulales) and introduction of Baltazaria gen. nov. https://mycokeys.pensoft.net/article/26303/ MycoKeys 37: 39-56

DOI: 10.3897/mycokeys.37.26303

Authors: Caio A. Leal-Dutra, Maria Alice Neves, Gareth W. Griffith, Mateus A. Reck, Lina A. Clasen, Bryn T. M. Dentinger

Abstract: The genus Parapterulicium was first introduced to accommodate two Brazilian species of coralloid fungi with affinities to Pterulaceae (Agaricales). Despite the coralloid habit and the presence of skeletal hyphae, other features, notably the presence of gloeocystidia, dichophyses and papillate hyphal ends, differentiate this genus from Pterulaceaesensu stricto. Fieldwork in Brazil resulted in the rediscovery of two coralloid fungi identifiable as Parapterulicium, the first verified collections of this genus since Corner’s original work in the 1950s. Molecular phylogenetic analyses of nrITS and nrLSU sequences from these modern specimens revealed affinities with the /peniophorales clade in the Russulales, rather than Pterulaceae. The presence of distinctive hyphal elements, homologous to the defining features of /peniophorales, is consistent with the phylogenetic evidence and thus clearly distinguished Parapterulicium and its type species P. subarbusculum from Pterulaceae, placing this genus within /peniophorales. Parapterulicium was also found to be polyphyletic so Baltazaria gen. nov. is proposed to accommodate P. octopodites, Scytinostroma galactinum, S. neogalactinum and S. eurasiaticogalactinum also within /peniophorales.

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Research Article Tue, 31 Jul 2018 10:32:46 +0300