Monilochaetes pteridophytophila (Australiascaceae, Glomerellales), a new fungus from tree fern

During taxonomic and phylogenetic studies of fungi on pteridophytes in Thailand, Monilochaetes pteridophytophila sp. nov. was collected from the scale of a tree fern (Alsophila costularis, Cyatheaceae). The new species is introduced based on evidence from morphological comparison and analysis of a concatenated LSU, ITS, SSU and RPB2 sequence data.Monilochaetes pteridophytophila differs from extant species of Monilochaetes in having darker and fewer, 1–4-septate conidiophores. Monilochaetes pteridophytophila forms a distinct clade basal from other species of Monilochaetes in Australiascaceae. A detailed description and illustrations of the new species are provided. We also provided a synopsis of accepted species of Monilochaetes

FIGURE 2 in Taxonomy and phylogeny of Paradictyoarthrinium salsipaludicola sp. nov. (Paradictyoarthriniaceae, Pleosporales) from mangroves

FIGURE 2. Results of the PHI test using both LogDet transformation and splits decomposition. The new taxon described in this study is indicated in green.Published as part of <i>Htet, Zin Hnin, Prematunga, Chasika, Mapook, Ausana, Jones, E.B. Gareth & Chethana, K.W. Thilini, 2023, Taxonomy and phylogeny of Paradictyoarthrinium salsipaludicola sp. nov. (Paradictyoarthriniaceae, Pleosporales) from mangroves, pp. 283-292 in Phytotaxa 620 (4)</i> on page 286, DOI: 10.11646/phytotaxa.620.4.4, <a href="http://zenodo.org/record/10025151">http://zenodo.org/record/10025151</a&gt

FIGURE 1 in Taxonomy and phylogeny of Paradictyoarthrinium salsipaludicola sp. nov. (Paradictyoarthriniaceae, Pleosporales) from mangroves

FIGURE 1. Best-scoring RAxML tree of the combined alignment of LSU, ITS and rpb2 sequence data. The tree was rooted with Melanomma pulvis-pyrius (CBS 124080). Bootstrap support values equal to or greater than 80% for ML and PP values equal to or greater than 0.90 are shown as ML/PP at respective nodes. The isolate obtained in this study is in blue. Ex-type strains are in bold. The scale bar represents the expected number of nucleotide substitutions per site.Published as part of <i>Htet, Zin Hnin, Prematunga, Chasika, Mapook, Ausana, Jones, E.B. Gareth & Chethana, K.W. Thilini, 2023, Taxonomy and phylogeny of Paradictyoarthrinium salsipaludicola sp. nov. (Paradictyoarthriniaceae, Pleosporales) from mangroves, pp. 283-292 in Phytotaxa 620 (4)</i> on page 286, DOI: 10.11646/phytotaxa.620.4.4, <a href="http://zenodo.org/record/10025151">http://zenodo.org/record/10025151</a&gt

Taxonomy and phylogeny of Paradictyoarthrinium salsipaludicola sp. nov. (Paradictyoarthriniaceae, Pleosporales) from mangroves

Htet, Zin Hnin, Prematunga, Chasika, Mapook, Ausana, Jones, E.B. Gareth, Chethana, K.W. Thilini (2023): Taxonomy and phylogeny of Paradictyoarthrinium salsipaludicola sp. nov. (Paradictyoarthriniaceae, Pleosporales) from mangroves. Phytotaxa 620 (4): 283-292, DOI: 10.11646/phytotaxa.620.4.4, URL: http://dx.doi.org/10.11646/phytotaxa.620.4.

Polyketide-Derived Secondary Metabolites from a Dothideomycetes Fungus, . et . ., (Muyocopronales) with Antimicrobial and Cytotoxic Activities.

Pseudopalawania siamensisgen. et sp. nov., from northern Thailand, is introduced based on multi-gene analyses and morphological comparison. An isolate was fermented in yeast malt culture broth and explored for its secondary metabolite production. Chromatographic purification of the crude ethyl acetate (broth) extract yielded four tetrahydroxanthones comprised of a new heterodimeric bistetrahydroxanthone, pseudopalawanone (1), two known dimeric derivatives, 4,4'-secalonic acid D (2) and penicillixanthone A (3), the corresponding monomeric tetrahydroxanthone paecilin B (4), and the known benzophenone, cephalanone F (5). Compounds 1-3 showed potent inhibitory activity against Gram-positive bacteria. Compounds 2 and 3 were inhibitory against Bacillus subtilis with minimum inhibitory concentrations (MIC) of 1.0 and 4.2 μg/mL, respectively. Only compound 2 showed activity against Mycobacterium smegmatis. In addition, the dimeric compounds 1-3 also showed moderate cytotoxic effects on HeLa and mouse fibroblast cell lines, which makes them less attractive as candidates for development of selectively acting antibiotics

Polyketide-Derived Secondary Metabolites from a Dothideomycetes Fungus, Pseudopalawania siamensis gen. et sp. nov., (Muyocopronales) with Antimicrobial and Cytotoxic Activities

Pseudopalawania siamensis gen. et sp. nov., from northern Thailand, is introduced based on multi-gene analyses and morphological comparison. An isolate was fermented in yeast malt culture broth and explored for its secondary metabolite production. Chromatographic purification of the crude ethyl acetate (broth) extract yielded four tetrahydroxanthones comprised of a new heterodimeric bistetrahydroxanthone, pseudopalawanone (1), two known dimeric derivatives, 4,4′-secalonic acid D (2) and penicillixanthone A (3), the corresponding monomeric tetrahydroxanthone paecilin B (4), and the known benzophenone, cephalanone F (5). Compounds 1–3 showed potent inhibitory activity against Gram-positive bacteria. Compounds 2 and 3 were inhibitory against Bacillus subtilis with minimum inhibitory concentrations (MIC) of 1.0 and 4.2 μg/mL, respectively. Only compound 2 showed activity against Mycobacterium smegmatis. In addition, the dimeric compounds 1–3 also showed moderate cytotoxic effects on HeLa and mouse fibroblast cell lines, which makes them less attractive as candidates for development of selectively acting antibiotics

One New Species and Two New Host Records of Apiospora from Bamboo and Maize in Northern Thailand with Thirteen New Combinations

The genus Apiospora is known as a cosmopolitan genus, found across various substrates. In this study, four Apiospora taxa were obtained from the decaying stems of bamboo and maize in northern Thailand. Apiospora collections were compared with known species based on the morphological characteristics and the DNA sequence data of internal transcribed spacer (ITS), the partial large subunit nuclear rDNA (LSU), the translation elongation factor 1-alpha gene (TEF1-α) and beta-tubulins (TUB2). Apiospora chiangraiense sp. nov. and two new host records (Ap. intestini and Ap. rasikravindra) are introduced here based on the morphological characteristics and multi-locus analyses. Additionally, thirteen species previously identified as Arthrinium are introduced as new combinations in Apiospora, viz., Ap. acutiapica, Ap. bambusicola, Ap. biserialis, Ap. cordylines, Ap. cyclobalanopsidis, Ap. euphorbiae, Ap. gelatinosa, Ap. locuta-pollinis, Ap. minutispora, Ap. pseudorasikravindrae, Ap. septate, Ap. setariae and Ap. sorghi

Morphology and phylogenetic analyses reveal Montagnula puerensis sp. nov. (Didymosphaeriaceae, Pleosporales) from southwest China

Du, Tianye, Hyde, Kevin D., Mapook, Ausana, Mortimer, Peter E., Xu, Jianchu, Karunarathna, Samantha C., Tibpromma, Saowaluck (2021): Morphology and phylogenetic analyses reveal Montagnula puerensis sp. nov. (Didymosphaeriaceae, Pleosporales) from southwest China. Phytotaxa 514 (1): 1-25, DOI: 10.11646/phytotaxa.514.1.1, URL: http://dx.doi.org/10.11646/phytotaxa.514.1.

Three New Species, Two New Records and Four New Collections of Tubeufiaceae from Thailand and China

Tubeufiaceae, a cosmopolitan family with a worldwide distribution, is mostly reported as saprobic on decaying woody materials from both aquatic and terrestrial habitats. The family is commonly found as helicosporous hyphomycetes, while some are chlamydosporous and phragmosporous. In this study, thirteen helicosporous hyphomycetes were collected from Thailand and China. The phylogenetic analyses of combined ITS, LSU, TEF1-α, and RPB2 sequence data placed them in Dematiohelicomyces, Helicoma, Helicotruncatum, Neohelicosporium, Parahelicomyces, and Tubeufia within Tubeufiaceae. Three new species, Tubeufia cocois, Parahelicomyces chiangmaiensis, and Neohelicosporium bambusicola, one new host record, Tubeufia laxispora, and one new geographic record, T. longihelicospora, are introduced based on both morphological characteristics and phylogenetic analyses. In addition, Dematiohelicomyces helicosporus, Helicoma guttulatum, Helicotruncatum palmigenum, and Tubeufia cylindrothecia are described with detailed descriptions and color photo plates

Colletotrichum dracaenigenum, a new species on Dracaena fragrans

Chaiwan, Napalai, Tibpromma, Saowaluck, Jayawardena, Ruvishika S., Mapook, Ausana, Wanasinghe, Dhanushka N., Mortimer, Peter E., Lumyong, Saisamorn, Hyde, Kevin D. (2021): Colletotrichum dracaenigenum, a new species on Dracaena fragrans. Phytotaxa 491 (2): 143-157, DOI: 10.11646/phytotaxa.491.2.4, URL: http://dx.doi.org/10.11646/phytotaxa.491.2.