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The family Microthyriaceae is represented by relatively few mycelial cultures and DNA sequences; as a result, the taxonomy and classification of this group of organisms remain poorly understood. During the investigation of the diversity of aquatic hyphomycetes from southern China, several isolates were collected. These isolates were cultured and se...
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Citations
... Hongsanan et al. [12] added two new asexual genera and provided a holomorphic family description. Two new Triscelophorus species were introduced by Qiao et al. [13], and the systematic placement of Triscelophorus was confirmed within Microthyriaceae. Recently, four asexual genera were introduced to the family [13,14]. ...
... Two new Triscelophorus species were introduced by Qiao et al. [13], and the systematic placement of Triscelophorus was confirmed within Microthyriaceae. Recently, four asexual genera were introduced to the family [13,14]. So far, Microthyriaceae contains 16 genera, including eight asexual genera, Antidactylaria, Hamatispora, Isthmomyces, Keqinzhangia, Neoanungitea, Pseudocoronospora, Pseudopenidiella, and Triscelophorus [12][13][14][15]. ...
... Recently, four asexual genera were introduced to the family [13,14]. So far, Microthyriaceae contains 16 genera, including eight asexual genera, Antidactylaria, Hamatispora, Isthmomyces, Keqinzhangia, Neoanungitea, Pseudocoronospora, Pseudopenidiella, and Triscelophorus [12][13][14][15]. Asexual morphs in Microthyriaceae are characterized by micronematous to macronematous, mononematous, unbranched or branched, hyaline or brown conidiophores, some reduced to conidiogenous cells, integrated, terminal, determinate or sympodial, mono-to polyblastic conidiogenous cells, and subcylindrical to ellipsoid, obclavate, pale brown, verruculose, aseptate to multi-septate conidia, solitary or in branched chains, sometimes radial on compact heads; ramoconidia when present, subcylindrical to fusoid-ellipsoid, pale brown, verruculose, aseptate [12]. ...
Microthyriaceae is typified by the sexual genus Microthyrium, with eight asexual genera. Three interesting isolates were collected during our investigation of freshwater fungi from the wetlands in Guizhou Province, southwest China. Three new asexual morphs are identified. Phylogenetic analyses using ITS and LSU gene regions revealed the placement of these isolates in Microthyriaceae (Microthyriales, Dothideomycetes). Based on the morphology and phylogenetic evidence, two new asexual genera, Paramirandina and Pseudocorniculariella, and three new species, Pa. aquatica, Pa. cymbiformis, and Ps. guizhouensis, are introduced. Descriptions and illustrations of the new taxa are provided, with a phylogenetic tree of Microthyriales and related taxa.
... The newly attained sequences were initially subjected to BLASTn searches in GenBank (http://www.ncbi.nlm.nih.gov/) to identify the taxa that shared the most similarities with our strains. The additional sequences included in the analysis were from recent publications (Qiao et al. 2021, Zheng et al. 2022. The Kirschsteiniothelia lignicola (MFLUCC 10-0036) was selected as the out-group taxon. ...
... The Bayesian analysis resulted in 10000 trees after 1,000,000 generations. All analyses (ML, MP and BYPP) gave similar results and were in agreement with previous studies based on multi-gene analyses (Qiao et al. 2021, Zheng et al. 2022. ...
... For example, the findings of Wu et al. (2011), which provided a broad revision of Microthyriaceae based on morphology and molecular data, helped to clear up a lot of ambiguities in the family. Wu et al. (2011) findings have been followed by numerous subsequent studies, most of which have used multi-gene phylogeny for their phylogeny analyses , Qiao et al. 2021, Zheng et al. 2022). Recent investigations have identified a number of new genera in Microthyriaceae, thus this family is currently phylogenetically highly diversified. ...
During our ongoing studies of fungal diversity on leaf litter, two exciting species were collected from Thailand. Morphological examination coupled with phylogenetic analyses revealed that our species belongs to Paramicrothyrium and Tumidispora in Microthyriaceae. Maximum likelihood, maximum parsimony, and Bayesian analyses of combined internal transcribed spacer (ITS) and large nuclear subunit ribosomal DNA (LSU) sequence data were performed to clarify the phylogenetic affinities of the species. Based on their distinctive morphological traits and phylogenetic support, the new species Paramicrothyrium bambusae and Tumidispora thailandica were introduced. In addition, the new species were compared with phylogenetically and morphologically closely related species, and detailed descriptions, micrographs, and phylogenetic trees of the new species are provided.
... Southern China has high fungal diversity and is considered one of the world's 34 biodiversity hotspots [1,2]. Yunnan Province, located in the southwest of China, harbors an inestimable diversity of fungi [3][4][5][6][7][8]. It has warm and humid subtropical climate, with an average annual temperature of 18.8 to 20.5 °C and an average annual precipitation of 1170-1300 mm [9], which is conducive to the growth of fungi. ...
During a survey of soil fungal diversity in a rocky desertification area in Yunnan Province, China, a new dematiaceous hyphomycete, Cordana yunnanensis was identified. Morphologically, this species is characterized by macronematous, mononematous conidiophores with discrete, polyblastic conidiogenous cells arranged in a whorl at the apices. Phylogenetic analysis of the combined sequences of the internal transcribed spacer and the large nuclear ribosomal RNA subunit confirmed the phylogenetic position of C. yunnanensis within the genus Cordana, in Cordanaceae.
Epifoliar fungi are one of the significant fungal groups typically living on the surface of leaves. They are usually recorded as saprobes, obligate parasites and commensals and are widely distributed in tropical and subtropical regions. Numerous genera within this group remain inadequately understood, primarily attributed to limited taxonomic knowledge and insufficient molecular data. Furthermore, the taxonomic delineation of epifoliar fungi remained uncertain, with scattered and literature-based data often intermixed with other follicolous fungi. Herein, a comprehensive taxonomic monograph of 124 genera in (32) Asterinales, (18) Capnodiales, (15) Chaetothyriales, (8) Meliolales, (8) Micropeltidales, (10) Microthyriales, (32) Parmulariales and (1) Zeloasperisporiales was provided re-describing with illustrations and line drawings. Notes on ecological and economic importance of the families are also provided. Representatives type herbarium materials of Campoa pulcherrima, Cycloschizon brachylaenae, Ferrarisia philippina, Hysterostomella guaranitica, Palawaniella orbiculata and Pseudolembosia orbicularis of Parmulariaceae were re-examined and provided updated illustrations with descriptions. A backbone phylogenetic tree and divergence estimation analysis for epifoliar fungi based on LSU and 5.8s ITS sequence data are provided.
Antecedentes y Objetivos:
Los micromicetos asexuales (MA) constituyen un grupo diverso y abundante de hongos en la naturaleza. Hasta la fecha para el Estado de México no se habían realizado estudios sobre estos hongos. El objetivo de esta aportación es proporcionar información sobre la riqueza taxonómica de las especies de MA que habitan en hojas vivas senescentes y muertas de cinco especies de Quercus de un bosque templado en el municipio Huixquilucan, Estado de México, México.
Métodos:
Durante un año, quincenalmente se cortaron hojas de cinco especies diferentes de encinos vivas senescentes y se recolectaron hojas del suelo. Las muestras se incubaron en cámaras húmedas; la revisión microscópica se efectuó dos veces por semana. La determinación taxonómica se basó en la conidiogénesis y en las características morfométricas de los conidiomas. El material de referencia (preparaciones microscópicas), se depositó en el herbario del Instituto de Ecología, A.C. (XAL) en Xalapa, Veracruz, México. Los nuevos registros para la micobiota de México se ilustran y describen en detalle.
Resultados clave:
Se identificaron 30 especies de MA, 12 de ellas constituyen nuevos registros para el país y todas lo son para el Estado de México. En las hojas muertas del suelo hubo un mayor número de especies que en las hojas vivas senescentes. Ocho de los taxones identificados no habían sido recolectados desde que fueron descritos como especies nuevas para la ciencia. Trichothecium roseum, Pestalotiopsis maculans y Vermiculariopsiella immersa son micromicetos que están ampliamente distribuidos en las hojas de todas las especies de encinos estudiadas.
Conclusiones:
La riqueza de MA encontrada en el área de estudio evidencia que las hojas de los Quercus son sustratos que albergan una considerable riqueza fúngica aun desconocida en México. Lo anterior es una importante razón para la conservación de los bosques de Quercus y promover estudios sobre este grupo de micromicetos en nuestro país.
Colletotrichum species are plant pathogens, saprobes, and endophytes in many economically important hosts. Many studies have investigated the diversity and pathogenicity of Colletotrichum species in common ornamentals, fruits, and vegetables. However, Colletotrichum species occurring in aquatic plants are not well known. During the investigation of the diversity of endophytic fungi in aquatic plants in southwest China, 66 Colletotrichum isolates were obtained from aquatic plants there, and 26 of them were selected for sequencing and analyses of actin (ACT), chitin synthase (CHS-1), glyceraldehyde-3-phosphate dehydrogenase (GAPDH), the internal transcribed spacer (ITS) region, and β-tubulin (TUB2) genomic regions. Based on morphological characterization and multi-locus phylogenetic analyses, 13 Colletotrichum species were recognized, namely, C. baiyuense sp. nov., C. casaense sp. nov., C. demersi sp. nov., C. dianense sp. nov., C. fructicola, C. garzense sp. nov., C. jiangxiense, C. karstii, C. philoxeroidis sp. nov., C. spicati sp. nov., C. tengchongense sp. nov., C. vulgaris sp. nov., C. wuxuhaiense sp. nov. Two species complexes, the C. boninense species complex and C. gloeosporioides species complex, were found to be associated with aquatic plants. Pathogenicity tests revealed a broad diversity in pathogenicity and aggressiveness among the eight new Colletotrichum species.
