Latest Articles from MycoKeys Latest 7 Articles from MycoKeys https://mycokeys.pensoft.net/ Fri, 29 Mar 2024 03:37:25 +0200 Pensoft FeedCreator https://mycokeys.pensoft.net/i/logo.jpg Latest Articles from MycoKeys https://mycokeys.pensoft.net/ Four new species of Trichomonascaceae (Saccharomycetales, Saccharomycetes) from Central China https://mycokeys.pensoft.net/article/83829/ MycoKeys 90: 1-18

DOI: 10.3897/mycokeys.90.83829

Authors: Chun-Yue Chai, Wan-Li Gao, Zhen-Li Yan, Feng-Li Hui

Abstract: Trichomonascaceae is the largest family of ascomycetous yeast in the order Saccharomycetales. In spite of the extensive body of research on Trichomonascaceae in China, there remain new species to be discovered. Here, we describe four new species isolated from several rotting wood samples from Henan Province, Central China. Phylogenetic analysis of a combined ITS and nrLSU dataset with morphological studies revealed four new species in the Trichomonascaceae: Diddensiella luoyangensis, Sugiyamaella cylindrica, Su. robnettiae, and Zygoascus detingensis. Clustering in the Diddensiella clade, D. luoyangensis’ closest neighbour was D. transvaalensis. Meanwhile, Su. cylindrica clustered in the Sugiyamaella clade closest to Su. marilandica and Su. qingdaonensis. Also clustering in the Sugiyamaella clade, Su. robnettiae was most closely related to Su. chuxiongensis. Finally, Z. detingensis occupied a distinct and separated basal branch from the other species of the genus Zygoascus. These results indicate a high species diversity of Trichomonascaceae.

HTML

XML

PDF

]]>
Research Article Wed, 25 May 2022 10:11:39 +0300
Kodamaea hongheensis f.a., sp. nov., Kodamaea ovata f.a., sp. nov. and Kodamaea yamadae f.a., sp. nov., three new yeast species of Kodamaea (Saccharomycetales, Debaryomycetacae) from China https://mycokeys.pensoft.net/article/81119/ MycoKeys 89: 121-137

DOI: 10.3897/mycokeys.89.81119

Authors: Chun-Yue Chai, Wan-Li Gao, Ying Li, Zhen-Li Yan, Feng-Li Hui

Abstract: Kodamaea includes a growing number of interesting yeasts of the family Debaryomycetacae that are widely distributed in temperate, subtropical and tropical regions of different continents. During recent yeast collections in Henan and Yunnan Province in China, several isolates of Kodamaea were obtained from rotting wood, all of which represent undescribed taxa. Based on morphological and phylogenetic analyses (ITS and LSU rDNA), three new species are proposed: K. hongheensis f.a., sp. nov., K. ovata f.a., sp. nov. and K. yamadae f.a., sp. nov. In addition, sixteen Candida species, which are members of the Kodamaea clade based on phylogenetic analysis, are transferred to Kodamaea as new combinations. Our results indicate high species diversity of Kodamaea waiting to be discovered in rotting wood from tropical and subtropical China.

HTML

XML

PDF

]]>
Research Article Fri, 29 Apr 2022 10:26:16 +0300
New species of Yamadazyma from rotting wood in China https://mycokeys.pensoft.net/article/71156/ MycoKeys 83: 69-84

DOI: 10.3897/mycokeys.83.71156

Authors: Wan-Li Gao, Ying Li, Chun-Yue Chai, Zhen-Li Yan, Feng-Li Hui

Abstract: Yamadazyma is one of the largest genera in the family Debaryomycetaceae (Saccharomycetales, Saccharomycetes) with species mainly found in rotting wood, insects and their resulting frass, but also recovered from flowers, leaves, fruits, tree bark, mushrooms, sea water, minerals, and the atmosphere. In the present study, several strains obtained from rotting wood in Henan and Yunnan Provinces of China were isolated. Based on morphology and a molecular phylogeny of the rDNA internal transcribed spacer region (ITS) and the D1/D2 domain of the large subunit (LSU) rDNA, these strains were identified as three new species: Yamadazyma luoyangensis, Y. ovata and Y. paraaseri; and three previously described species, Y. insectorum, Y. akitaensis, and Y. olivae. The three new species are illustrated and their morphology and phylogenetic relationships with other Yamadazyma species are discussed. Our results indicate a high undiscovered diversity of Yamadazyma spp. inhabiting rotting wood in China.

HTML

XML

PDF

]]>
Research Article Thu, 26 Aug 2021 09:43:53 +0300
Diversity of the genus Sugiyamaella and description of two new species from rotting wood in China https://mycokeys.pensoft.net/article/60077/ MycoKeys 77: 27-39

DOI: 10.3897/mycokeys.77.60077

Authors: Cheng-Feng Shi, Kai-Hong Zhang, Chun-Yue Chai, Zhen-Li Yan, Feng-Li Hui

Abstract: Species of the genus Sugiyamaella (Trichomonascaceae, Saccharomycetales), found in rotting wood in China, were investigated using morphology and the molecular phylogeny of a combined ITS and nrLSU dataset. Nine taxa were collected in China: two were new species (viz. Sugiyamaella chuxiong sp. nov. and S. yunanensis sp. nov.) and seven were known species, S. americana, S. ayubii, S. novakii, S. paludigena, S. valenteae, S. valdiviana and S. xiaguanensis. The two new species are illustrated and their morphology and phylogenetic relationships with other Sugiyamaella species are discussed. Our results indicate a potentially great diversity of Sugiyamaella spp. inhabiting rotting wood in China just waiting to be discovered.

HTML

XML

PDF

]]>
Research Article Tue, 12 Jan 2021 08:15:34 +0200
Five new additions to the genus Spathaspora (Saccharomycetales, Debaryomycetaceae) from southwest China https://mycokeys.pensoft.net/article/57192/ MycoKeys 75: 31-49

DOI: 10.3897/mycokeys.75.57192

Authors: Shi-Long Lv, Chun-Yue Chai, Yun Wang, Zhen-Li Yan, Feng-Li Hui

Abstract: Spathaspora is an important genus of d-xylose-fermenting yeasts that are poorly studied in China. During recent yeast collections in Yunnan Province in China, 13 isolates of Spathaspora were obtained from rotting wood and all represent undescribed taxa. Based on morphological and phylogenetic analyses (ITS and nuc 28S), five new species are proposed: Spathaspora elongata, Sp. mengyangensis, Sp. jiuxiensis, Sp. parajiuxiensis and Sp. rosae. Our results indicate a high species diversity of Spathaspora waiting to be discovered in rotting wood from tropical and subtropical southwest China. In addition, the two Candida species, C. jeffriesii and C. materiae, which are members of the Spathaspora clade based on phylogeny, are transferred to Spathaspora as new combinations.

HTML

XML

PDF

]]>
Research Article Mon, 9 Nov 2020 08:32:57 +0200
Morphological and phylogenetic characterisations reveal three new species of Samsoniella (Cordycipitaceae, Hypocreales) from Guizhou, China https://mycokeys.pensoft.net/article/56655/ MycoKeys 74: 1-15

DOI: 10.3897/mycokeys.74.56655

Authors: Wan-Hao Chen, Yan-Feng Han, Jian-Dong Liang, Wei-Yi Tian, Zong-Qi Liang

Abstract: Samsoniella species have been found on lepidopteran larvae or pupae buried in soil or leaf litter. Three new species, Samsoniella hymenopterorum, S. coleopterorum and S. lepidopterorum, parasitic on hymenopteran larvae, coleopteran larvae and lepidopteran pupae, respectively, are reported. Morphological comparisons with extant species and DNA-based phylogenies from analysis of a multigene (ITS, RPB1, RPB2 and TEF) dataset supported the establishment of the new species. Unusually, all three new species have mononematous conidiophores. The new species are clearly distinct from other species in Samsoniella occurring in separate subclades.

HTML

XML

PDF

]]>
Research Article Mon, 19 Oct 2020 16:42:34 +0300
Diversity and toxigenicity of fungi and description of Fusarium madaense sp. nov. from cereals, legumes and soils in north-central Nigeria https://mycokeys.pensoft.net/article/52716/ MycoKeys 67: 95-124

DOI: 10.3897/mycokeys.67.52716

Authors: Chibundu N. Ezekiel, Bart Kraak, Marcelo Sandoval-Denis, Michael Sulyok, Oluwawapelumi A. Oyedele, Kolawole I. Ayeni, Oluwadamilola M. Makinde, Oluwatosin M. Akinyemi, Rudolf Krska, Pedro W. Crous, Jos Houbraken

Abstract: Mycological investigation of various foods (mainly cowpea, groundnut, maize, rice, sorghum) and agricultural soils from two states in north-central Nigeria (Nasarawa and Niger), was conducted in order to understand the role of filamentous fungi in food contamination and public health. A total of 839 fungal isolates were recovered from 84% of the 250 food and all 30 soil samples. Preliminary identifications were made, based on macro- and micromorphological characters. Representative strains (n = 121) were studied in detail using morphology and DNA sequencing, involving genera/species-specific markers, while extrolite profiles using LC-MS/MS were obtained for a selection of strains. The representative strains grouped in seven genera (Aspergillus, Fusarium, Macrophomina, Meyerozyma, Neocosmospora, Neotestudina and Phoma). Amongst the 21 species that were isolated during this study was one novel species belonging to the Fusarium fujikuroi species complex, F. madaense sp. nov., obtained from groundnut and sorghum in Nasarawa state. The examined strains produced diverse extrolites, including several uncommon compounds: averantinmethylether in A. aflatoxiformans; aspergillimide in A. flavus; heptelidic acid in A. austwickii; desoxypaxillin, kotanin A and paspalitrems (A and B) in A. aflatoxiformans, A. austwickii and A. cerealis; aurasperon C, dimethylsulochrin, fellutanine A, methylorsellinic acid, nigragillin and pyrophen in A. brunneoviolaceus; cyclosporins (A, B, C and H) in A. niger; methylorsellinic acid, pyrophen and secalonic acid in A. piperis; aspulvinone E, fonsecin, kojic acid, kotanin A, malformin C, pyranonigrin and pyrophen in A. vadensis; and all compounds in F. madaense sp. nov., Meyerozyma, Neocosmospora and Neotestudina. This study provides snapshot data for prediction of food contamination and fungal biodiversity exploitation.

HTML

XML

PDF

]]>
Research Article Mon, 8 Jun 2020 13:23:41 +0300