Phylogenetic relationships among ascomycetes: evidence from an RNA polymerse II subunit

Unearthing limestone fungal diversity: Description of seven novel species from Portugal

Stone-built heritages are found worldwide, and despite stony surfaces being considered a stressful environment with challenging conditions to overcome, research has demonstrated that it can support diverse fungal communities, fostering a unique array of peculiar yet crucial species. These species exhibit a dual nature, being both foe and friend. While these fungi play a considerable role in the deterioration of cultural heritage, their mechanisms of adaptation to unfavourable environments hold great promise for biotechnology. Despite their importance, there is limited information available about these stone dwellers in Portugal. During an experimental survey aimed at isolating fungal species thriving in a deteriorated limestone funerary art piece at the Lemos Pantheon, a national monument located in Águeda, Portugal, several fungal specimens were isolated that could not be identified as any currently known species. Through morphological characteristics and multilocus phylogenetic analyses, seven new species (Aspergillus albicolor sp. nov., Banksiophoma dissensa sp. nov., Knufia lusitanica sp. nov., Microascus lausatensis sp. nov., Neodevriesia saximollicula sp. nov., Paramicrodochium filiforme sp. nov. and Talaromyces benedictus sp. nov.) are here proposed, illustrated, and compared to closely related species. These newly discovered fungal taxa form distinct lineages independent of other previously described species and are classified into seven families across six orders within the phylum Ascomycota. This paper also provides additional evidence that stone heritages harbour a diverse range of new species, deserving additional focus in the future. Citation: Paiva DS, Fernandes L, Pereira E, Mesquita N, Tiago I, Trovão J, Portugal A (2025). Unearthing limestone fungal diversity: Description of seven novel species from Portugal Fungal Systematics and Evolution 15: 47-77. doi: 10.3114/fuse.2025.15.02.

Inside out: New root endophytic Penicillium and Talaromyces species isolated from Cattleya orchids (Orchidaceae) in Brazil

The Orchidaceae family comprises a highly diverse group of flowering plants. The genus Cattleya is restricted to the Neotropics, with approximately 80 % of the species present in Brazil occurring in epiphytic, rupicolous, and terrestrial habitats. During surveys that aimed to investigate root fungal endophytes of two native orchids, C. locatellii and C. violacea, a total of 10 endophytic isolates were identified as belonging to Eurotiales. A polyphasic approach was applied for the identification and characterization of the cultured species, combining morphological and molecular data. Phylogenetic analyses were performed using the internal transcribed spacers (ITS) of the rDNA, beta-tubulin (BenA), calmodulin (CaM), and RNA polymerase second-largest subunit (RPB2) sequences. Two new endophytic species were identified and described from roots of C. locatellii, namely Penicillium endophyticum sp. nov. (section Aspergilloides), and Talaromyces cattleyae sp. nov. (section Purpurei). In addition, P. yuyongnianii (section Lanata-Divaricata), T. amestolkiae, and T. atkinsoniae (section Talaromyces) were reported as endophytes from the genus Cattleya. Citation: Condé TO, Ramos DO, Nogueira PTS, Pereira OL (2025). Inside out: New root endophytic Penicillium and Talaromyces species isolated from Cattleya orchids (Orchidaceae) in Brazil. Fungal Systematics and Evolution 15: 179-200. doi: 10.3114/fuse.2025.15.08.

New treasures in Cordycipitaceae: Fungicolous fungi associated with Pseudocercospora fijiensis and P. musae in Brazil, including Matutinistella gen. nov

Cordycipitaceae is a large family belonging to the order Hypocreales, including cosmopolitan species found on different substrates. This family includes species with different lifestyles such as entomopathogenic, endophytic, and mycoparasitic fungi. Some mycoparasitic species in this family attack phytopathogenic fungi. We identified species of Cordycipitaceae found during a survey of fungicolous fungi associated with Pseudocercospora fijiensis and P. musae in Brazil. Based on morphological characters combined with phylogenetic analysis of ITS, LSU, SSU, RPB1, RPB2, and TEF1-α, we propose a new genus in Cordycipitaceae, namely Matutinistella, with its type species M. brasiliensis, and a new species of the genus Simplicillium, namely S. pseudocercosporicola. Furthermore, we report P. fijiensis as a new host of the mycoparasitic fungus Simplicillium lanosoniveum. In this study we newly report fungicolous fungi of Cordycipitaceae associated with the causal agents of Black Sigatoka and Yellow Sigatoka on banana crops. We provide relevant information for future work involving control measures for these diseases that cause major losses in banana crops. Citation: Custódio FA, Pereira OL (2025). New treasures in Cordycipitaceae: Fungicolous fungi associated with Pseudocercospora fijiensis and P. musae in Brazil, including Matutinistella gen. nov. Fungal Systematics and Evolution 15: 133-152. doi: 10.3114/fuse.2025.15.06.

Endophytic fungus Stagonosporopsis ajaci NEAU-BLH1 from Adonis amurensis enhances seed germination under low-temperature stress and increases grain yield in direct-seeded rice

Rice direct-seeding technology is regarded as a promising alternative to traditional transplanting due to its labor- and water-saving benefits. However, poor seedling emergence and growth under low-temperature stress remain major obstacles to its widespread adoption in Heilongjiang Province, China. Here, we isolated an endophytic fungus Stagonosporopsis ajaci NEAU-BLH1 from the cold-resistant plant Adonis amurensis, which effectively enhanced rice seed germination and seedling growth under low-temperature stress. Two years of pot and field experiments demonstrated that soaking rice seeds in a spore suspension of NEAU-BLH1 significantly increased tillering, resulting in a 16.0-47.8 % improvement in yield for direct-seeded rice. Mechanistic investigations revealed that NEAU-BLH1 treatment elevated gibberellin levels and reduced abscisic acid, accelerating starch hydrolysis into soluble sugars, thus improving germination under low temperature. Comprehensive physiological, transcriptomic, and metabolomic analyses indicated that NEAU-BLH1 enhances seedling growth by boosting respiratory metabolism, mitigating oxidative damage, and modulating hormone pathways. These findings indicate that seed-soaking with NEAU-BLH1 has good potential to enhance seed germination under low-temperature stress and increases grain yield in direct-seeded rice.

The araneopathogenic genus Gibellula (Cordycipitaceae: Hypocreales) in the British Isles, including a new zombie species on orb-weaving cave spiders (Metainae: Tetragnathidae)

The genus Gibellula (Cordycipitaceae: Hypocreales) comprises species pathogenic on and specific to spider hosts. Here, we report on the occurrence of a novel species infecting cave-dwelling, orb-weaving spiders of the sub-family Metainae (Tetragnathidae) in the British Isles. The new species, Gibellula attenboroughii is described and illustrated and its ecology is discussed; leading to the conclusion that infected spiders exhibit behavioural changes similar to those reported for zombie ants. The hidden diversity of the genus Gibellula in the British Isles is further highlighted based on fungarium records and literature searches. Two spider pathogens, previously assigned to the genus Torrubiella, are now transferred to the genus Gibellula, based on their Granulomanus synasexual morphs, in accordance with the one fungus-one name initiative: Gibellula albolanata comb. nov. and G. aranicida comb. nov. Citation: Evans HC, Fogg T, Buddie AG, Yeap YT, Araújo JPM (2025). The araneopathogenic genus Gibellula (Cordycipitaceae: Hypocreales) in the British Isles, including a new zombie species on orb-weaving cave spiders (Metainae: Tetragnathidae). Fungal Systematics and Evolution 15: 153-178. doi: 10.3114/fuse.2025.15.07.

Identification and fungicide sensitivity of Brunneomyces pennisetum, a new species causing wilt disease of Pennisetum purpureum × P. americanum in southern China

Pennisetum purpureum × P. americanum is an important forage in southwest China. In recent years, a considerable number of wilting plants have occurred in forage-growing regions located in Yunnan Province. The typical symptoms were that the surface of the wilted stems turned brown with a covering of white powder. Six isolates were identified as a new Brunneomyces species based on morphological characteristics and combined phylogenetic analysis of partial 28S nuc rDNA region (28S), internal transcribed spacer (ITS), translation elongation factor 1-alpha (TEF1-α), and the RNA polymerase II second largest subunit (RPB2) sequence data. The Koch's postulates test confirmed Brunneomyces pennisetum, sp. nov. as a pathogen causing wilt disease in Pennisetum purpureum × P. americanum. The colony diameter of B. pennisetum, sp. nov. exhibited different sensitivity to the six fungicides. Carbendazol (50%) was demonstrated to be the most effective in slowing the growth rate of the pathogen. The pathogen exhibited a higher growth rate at pH 7.0 but could not grow when the pH was greater than 9. The pathogen growth peaked at 25 C, but it could not grow at 5, 10, and 35 C.

Genetic diversity of true morels (Morchella) in Pakistan inferred from multilocus DNA sequence data augmented by a retrospective analysis of Pakistani and Indian morel sequences in GenBank

The current study was conducted to obtain the first detailed assessment of true morel (Morchella) species diversity in Pakistan. A collection of 179 morels was obtained by conducting field surveys in 13 districts during spring and autumn of 2014 through 2020. Species were identified phylogenetically by analyzing portions of two (RPB1, RPB2) or four (RPB1, RPB2, TEF1, ITS rDNA) marker loci together with authentic reference sequences of known species and by conducting BLASTn queries of National Center for Biotechnology Information (NCBI) GenBank. A retrospective analysis of morel sequences from Pakistani (N = 52) and Indian (N = 69) collections accessioned in GenBank was also conducted to expand and compare our knowledge of Morchella species diversity in both countries. Analyses of our 179-morel collection and the 52 Pakistani sequences deposited in GenBank indicated that at least 20 species are present in Pakistan, including five putatively novel taxa within the Elata subclade here informally distinguished as Morchella spp. (Mel-43 to Mel-47). Phylospecies Mel-45 and Mel-46 were described formally as M. pycnogranulata and M. waziristanica, respectively. By comparison, analyses of the 69 Indian sequences deposited in GenBank indicated that at least 12 species are extant in India. However, only 4/9 Pakistani and 3/12 Indian species were correctly identified in GenBank. Two collections of the steppe morel, M. steppicola (Mes-1), from Afghanistan were also included in the present study, which extends the southeasternmost range of this morphologically distinct species.

Morpho-Molecular Characterization of Hypocrealean Fungi Isolated from Rice in Northern Thailand

Hypocreales is one of the largest orders within the class Sordariomycetes and is renowned for its diversity of lifestyles, encompassing plant, insect, and human pathogens, as well as endophytes, parasites, and saprobes. In this study, we focused on saprobic hypocrealean fungi isolated from rice in northern Thailand. Species identification was conducted using morphological characteristics and multilocus phylogenetic analyses, including the internal transcribed spacer region (ITS), 28S large subunit nuclear ribosomal DNA (LSU), translation elongation factor 1-alpha (tef1-α), RNA polymerase II second-largest subunit (rpb2), and calmodulin (cmdA). This research confirmed the presence of 14 species of hypocrealean taxa, viz. Fusarium (9), Ochronectria (1), Sarocladium (2), Trichothecium (1), and Waltergamsia (1). Among these were two new species (Fusarium chiangraiense and F. oryzigenum), four new host records (Fusarium kotabaruense, Ochronectria thailandica, Sarocladium bactrocephalum, and Waltergamsia fusidioides), and three new geographical records (Fusarium commune, F. guilinense, and F. hainanese).

Three novel species of Alternaria (Pleosporales, Pleosporaceae) from cereal crops (Poaceae) in China

The genus Alternaria (Pleosporales, Pleosporaceae) comprises saprophytes and pathogens that are widespread around the world. Currently, more than 400 species are recognized within this genus and are classified into 29 sections. In this study, Alternaria strains were isolated from diseased leaves of two cereal crops, rice (Oryzasativa) and maize (Zeamays) in China. These Alternaria spp. were characterized by morphological characterization and phylogenetic analysis using maximum likelihood and Bayesian inference with multiple loci (ITS, GAPDH, RPB2, TEF1, Alt a 1, EndoPG, and OPA10-2). Based on the above analyses, three novel species of AlternariasectionAlternaria were introduced, namely A.oryzicola sp. nov., A.poae sp. nov., and A.zeae sp. nov. This study expands the species diversity of Alternaria associated with Poaceae plants in China.

Morphological and phylogenetic analyses reveal new species and records of Fusarium (Nectriaceae, Hypocreales) from China

Species of Fusarium are important phytopathogens, saprobes, and endophytes around the world. Some species can affect plant health and cause yield loss of economic plants. Fusarium species are widely distributed in China, and many species were found from different plant hosts. The Fusariumincarnatum-equiseti species complex (FIESC) is one of the most significant species complexes within the genus. Based on morphological and three-gene (cal, rpb2, and tef1) phylogenetic analyses, two new species are in the Incarnatum clade, and two new host records are identified and described, viz. Fusariumfici sp. nov., Fusariumxylosmatis sp. nov., Fusariumfecundum, and Fusariumweifangense.

New fungal genus, three novel species and one new record from mangroves, with reclassification of Melanconiella (Melanconiellaceae) species

Mangrove ecosystems, located in the land-sea interface, host a diverse array of fungi. In this paper, we introduce a novel genus, three novel species and one new record of fungi collected from mangrove environments in Pranburi, Prachuap Khiri Khan, Thailand. We establish Pseudomelanconiella as a new genus in Melanconiellaceae, to accommodate Pseudomelanconiellamangrovei, a saprobe from submerged decomposing wood of Avicenniamarina. Phylogenetic analysis indicates its close relation with Septomelanconiella, but they differ in the morphology of the conidia. Additionally, our analysis of Melanconiellaceae led to the reclassification of Melanconiellaloropetali to Sinodisculaloropetali and synonymizing Sinodisculacamellicola and Melanconiellacamelliae. This paper also introduces two other novel species: Peroneutypahibisci, a saprobe found on Hibiscustiliaceus and Pseudochaetosphaeronemabruguierae from Bruguieracylindrica, the first species in this genus reported as a mangrove fungus. A new record of Rimoramangrovei from Ceriopstagal is also reported. These discoveries emphasize the rich fungal diversity in mangrove ecosystems supporting further exploration of this unique environment.

Morpho-phylogenetic evidence reveals four novel species of Coniella (Diaporthales, Schizoparmaceae) from southern China

Coniella species are distributed worldwide and have been reported as plant pathogens, endophytes, or saprobes. In our ongoing survey of terrestrial plant fungi in southern China, we obtained Coniella isolates from diseased plant leaf tissues in Fujian, Hainan, and Yunnan provinces. Maximum likelihood and Bayesian inference based on four loci (ITS, LSU, rpb2, and tef1-α) were used to clarify the taxonomic placement of the species. We confirmed that they represent four new species, namely Conielladiaoluoshanensis, C.dongshanlingensis, C.grossedentatae, and C.veri based on both morphology and phylogeny support. The new species are compared with other Coniella species, comprehensive descriptions and micrographs are provided.

Three new species of Fusarium (Nectriaceae, Hypocreales) isolated from Eastern Cape dairy pastures in South Africa

A survey of the fungal diversity associated with mixed pastures from Eastern Cape dairy farms in South Africa led to the isolation of 155 Fusarium strains that belong to the Fusariumincarnatum-equiseti species complex (FIESC). Using single and multigene phylogenies based on partial sequences of the translation elongation factor 1-alpha (TEF), calmodulin (CaM), and the partial RNA polymerase second largest subunit (RPB2) genes, we identified 11 species. They included F.brevicaudatum, F.clavus, F.coffeatum, F.croceum, F.goeppertmayerae, and F.heslopiae, with five species that were found to be new. Based on morphological and phylogenetic data, three new species are formally described here as F.cumulatum, F.mariecurieae, and F.pascuum. We also provided a description for F.goeppertmayerae, as the authors who identified and named this species did not include one. We have chosen to not describe the remaining species, as our cultures lack proper morphological structure development. This study shows that mixed pastures harbour a diverse range of Fusarium species and highlights the need for further studies into their potential to impact animal health.

Phylogenetic analysis of plant-pathogenic and non-pathogenic Trichoderma isolates on maize from plants, soil, and commercial bio-products

Fungi of the genus Trichoderma are primarily associated with the mycobiome of dead wood but can also be occasionally found in soil and plant rhizospheres. Several Trichoderma spp. are used in crop health management to promote growth and control plant diseases. Although widely considered beneficial to plants, some members have been reported to be pathogenic to maize, causing a disease called Trichoderma ear rot. Since 2018, Trichoderma afroharzianum has caused significant infections of maize cobs in Germany, France, and Italy. This study aimed to investigate the pathogenicity and phylogenetic relationships among different Trichoderma strains from diverse sources and geographical origins. While previous studies primarily identified T. afroharzianum as the main species causing Trichoderma ear rot, this study found that isolates of T. asperellum, T. atroviride, and T. guizhouense may also exhibit pathogenicity on maize cobs. Additionally, Trichoderma strains from commercial biocontrol products displayed unexpected pathogenicity inducing up to 92% disease severity on maize cobs. Most T. afroharzianum strains induced high levels of disease severity, although some isolates of the same species did not cause any disease, indicating a large heterogeneity in pathogenicity within the species. Notably, phylogeny reconstruction based on the tef1-α and rpb2 genes did not result in any discernible clustering between pathogenic and non-pathogenic isolates. A further novel finding is the isolation of pathogenic Trichoderma isolates from agricultural soil, demonstrating that soil can serve as a reservoir for pathogenic species. This study highlights the need for biosecurity assessment and monitoring of Trichoderma strains for agricultural use, considering their beneficial and pathogenic potential.IMPORTANCEIn this study, we explored the ability of different Trichoderma species to infect maize plants. Trichoderma is a group of fungi known for its beneficial role in agriculture, often used as a biological pesticide to control fungal plant diseases. However, some species within this genus can also act as pathogens, causing infections in crops like maize. We found that one species, T. afroharzianum, is particularly aggressive, capable of infecting maize without the plant being wounded first. This makes it a potentially serious threat to crop health. In contrast, other species, such as T. atroviride and T. asperellum, only caused infections when maize plants were injured before. Our research suggests that pathogenic Trichoderma species not only effectively infect plants but can also survive well in soil, making their control difficult. These findings highlight the need for better understanding of how these fungi operate in order to manage the risks they pose to important crops like maize, while still taking advantage of their beneficial uses in agriculture.

Phylogeny of the European Collema species (Peltigerales, Lecanoromycetes)

The phylogenetic relationships and morphological diversity within European Collema s. str. species were investigated. A total of 104 new sequences (four molecular markers; mtSSU, b-tub, MCM7, and RPB2 genes) from 28 specimens were generated, and analysed and used for multi-locus phylogenetic analyses. Our results suggest that Collema is only monophyletic if Collemaglebulentum is considered part of Leptogium s. str. where it originally was described. This is supported by its paraplectenchymatous thallus. Degelius´ informal Collema "Flaccidum"- and "Nigrescens"-groups are not natural, as the "Flaccidum"-group is nested within the "Nigrescens"-group. Based on our findings, seven currently accepted Collema occur in Europe: C.flaccidum, C.subflaccidum, C.curtisporum, C.furfuraceum, C.nigrescens, C.ryssoleum, and C.subnigrescens. Collemafurfuraceum is further non-monophyletic, suggesting a need for taxonomic revision.

Unveiling Sordariomycetes taxa associated with woody litter in Northern Thailand

Sordariomycetes species are abundant in woody litter samples. In this study, we introduce two novel species, Diaporthethailandica (Diaporthaceae) and Occultithecachiangraiensis (Xylariaceae), from woody litter materials. We also describe a new host record of D.tulliensis and a new geographical record for D.melonis. All collections were identified based on morphology and phylogenetic analyses of combined datasets. The morphologies of the taxa fit the generic concepts of Diaporthe and Occultitheca, respectively. Diaporthethailandica formed a sister clade with D.raonikayaporum but differs from D.raonikayaporum in the sizes of conidiomata, conidiogenous cells, and beta conidia. Diaporthethailandica also differs from D.raonikayaporum by the absence of gamma conidia. Occultithecachiangraiensis differs from the sister taxon O.rosae in having smaller ascomata and a thicker mucilaginous sheath. We also provide a synopsis of Occultitheca species with details on their morphology, host, and country. These findings provide valuable insights into the diversity and ecological roles of Sordariomycetes, emphasising the need for continued exploration of fungal biodiversity in various environments.

Diversity of Alternaria Section Nimbya in Iran, with the Description of Eight New Species

Alternaria includes endophytes, saprophytes, and pathogens affecting both plants and animals, with a global distribution across various hosts and substrates. It is categorized into 29 sections, each defined by a type species and six monophyletic lineages. The Alternaria section Nimbya comprises 10 species primarily associated with the families Juncaceae and Cyperaceae, functioning as either saprophytes or plant pathogens. In this study, 189 fungal strains were collected from multiple locations across six provinces in Iran. The isolates were initially classified based on morphological characteristics and ISSR-PCR molecular marker banding patterns. Multi-gene phylogenetic analyses of 38 selected strains, using ITS-rDNA, GAPDH, TEF1, RPB2, and Alt a 1 gene sequences, combined with morphological data, led to the identification of 13 species, including eight new species, namely Alternaria caricifolia, A. cyperi, A. juncigena, A. junci-inflexi, A. persica, A. schoenoplecti, A. salkadehensis, and A. urmiana. In addition, this work identified new host associations (matrix nova) for three previously known species: A. caricicola on Cyperus sp., A. cypericola on Eleocharis sp., and A. junci-acuti on Carex sp. The study provides detailed morphological descriptions and illustrations of all identified species, discusses their habitats, distribution, and phylogenetic relationships within section Nimbya, and presents a key for species identification within this section in Iran. Furthermore, these findings highlight the significance of studying fungal biodiversity in Iran and contribute to a better understanding of species distribution and host range within the Alternaria section Nimbya.

Isolation and Characterization of Four Unreported Penicillium Species Isolated from the Freshwater Environments in Korea

The fungal species of the genus Penicillium can be found across a diverse array of environments. The infrageneric classification of the genus Penicillium has been studied with comparison of morphological and phylogenetical features, derived into two subgenus, 32 sections, and 89 series. In this study, 11 fungal strains were isolated from freshwater environments, plant litter, and nearby substrates in Korea and were identified as previously unreported species. The internal transcribed spacer (ITS) regions, β-tubulin (BenA), calmodulin (CaM), and RNA polymerase II subunit (RPB2) genes were analyzed for phylogenetic analyses. A neighbor-joining tree was then constructed using the concatenated DNA sequences, and the strains were compared with closely related species of the genus Penicillium. The strain clustered into distinct phylogenetic lineages, confirming their classification as P. contaminatum, P. jinfoshanicum, P. xuanhanense, and P. soppii. NNIBRFG40229 exhibits monoverticillate conidiophores with flask-shaped phialides, characteristic of P. contaminatum; NNIBRFG1595 presents divaricate conidiophores, consistent with P. jinfoshanicum; NNIBRFG5602 shows a velutinous texture with orange pigmentation, resembling P. xuanhanense; and NNIBRFG4602 shows biverticillate conidiophores with cylindrical metulae, corresponding to P. soppii. This study provides the first report of these species in Korea, enhancing taxonomic understanding.

Morphological and multi-locus phylogenetic analyses reveal three new branched species of Clavaria (Clavariaceae, Agaricales) from China

Based on morphological and molecular evidence, 12 specimens have been identified as belonging to three previously unrecognized species of Clavaria, which are here described as C.divergens, C.orientalis, and C.tongdaoensis. Clavariadivergens is characterized by its branched, white basidiomata. Clavariaorientalis and C.tongdaoensis are very similar to C.zollingeri in the field. However, C.orientalis is distinguished by its more robust branches, while C.tongdaoensis differs by its varied or paler color of basidiomata. A concatenated sequence dataset (ITS-nrLSU-RPB2) was used for multi-locus phylogenetic analysis. The phylogenetic tree of Clavaria showed that the three branched species each formed a distinct lineage with strong support. A key to the known branched species of Clavaria in China is provided.

Fungi from Malus in Qujing, China: two new species, three new records, and insights into potential host jumping and lifestyle switching

Apple trees [Malus domestica Borkh. (Rosaceae)] are one of the important temperate fruit crops in China. In comparison to other temperate fruits, such as grapes and pears, fungal studies (in Yunnan) associated with M. domestica are fewer in number. In the present study, we investigated fungi associated with M. domestica in Qujing City, Yunnan Province, China. Samples were collected from apple gardens in different locations. Single spore isolation was carried out to isolate saprobic fungi, while the surface sterilization method was carried out to isolate endophytic fungi. Molecular analyses were carried out to determine the phylogenetic placement of the new collections. Based on the combined methods of morphology and phylogeny, Cytospora qujingensis sp. nov. and Hypoxylon malongense sp. nov. are introduced as novel saprobic and endophytic taxa, respectively. Moreover, Aureobasidium pullulans and Cytospora schulzeri are reported as new geological records from southwestern China. Allocryptovalsa castaneae is reported on M. domestica in China for the first time. The checklist of fungi associated with M. domestica in China is presented.

Morphology and multi-gene phylogeny reveal three new species of Clonostachys and two combinations of Sesquicillium (Bionectriaceae, Hypocreales) from Xizang, China

Clonostachys and Sesquicillium are genera in Bionectriaceae, and known in sexual perithecial ascomata and hyphomycetous asexual morphs. In their asexual morph, both genera share similar morphology in conidiophores and conidiogenous cell characteristics but differ in the development of conidiophores. The members of Clonostachys are distributed worldwide with the majority occurring in the tropics and the species are commonly reported as soil-borne fungi but also reported as endophytes, epiphytes, and saprotrophs. During a microfungi survey in Xizang, China, six collections of fresh and healthy Ageratinaadenophora and Houttuyniacordata leaves were obtained. The taxonomy of these collections was investigated through a combination of morphological analysis and multigene phylogenetic analysis using Maximum likelihood and Bayesian inference. The newly generated sequences were clustered within Clonostachys and Sesquicillium, showing hyphomycetes asexual morph. The results revealed three new Clonostachys species viz, Clonostachyslinzhiensis, C.motuoensis, and C.yadongensis. This research sheds light on the overlooked fungal diversity in Xizang, China, expanding the known fungal biodiversity in the region. Additionally, two new combinations, Sesquicilliumaquaticum and S.shanghaiense for C.aquatica and C.shanghaiensis, and one synonymy, C.viticola for C.swietenia are established, respectively.

Identification and Characterization of Fusarium incarnatum Causing Leaf Spot and Fruit Rot on Luffa in China

In 2022, an outbreak of fungal rot disease affected luffa crops in Shanghai and Zhejiang Province. Infected plants exhibited symptoms including yellowing, chlorosis, wilting, and water-soaked occurred on leaves and fruits. Dark brown, concave lesions developed, often accompanied by white or pale pink mold under moist conditions. Fourteen pathogen strains, morphologically resembling Fusarium species, were isolated. Molecular analysis confirmed Fusarium incarnatum as the causative agent. Pathogenicity tests on luffa plants fulfilled Koch's postulates, with inoculated plants displaying the same symptoms. Re-isolation of the fungus from the inoculated plants confirmed its role in the disease. To our knowledge, this is the first report of F. incarnatum causing leaf spot and fruit rot on luffa in China. Moreover, the soil bacterial strain Bacillus velezensis BV171 displayed strong inhibition of F. incarnatum mycelia growth and promoted the growth of sponge gourd plants. These findings lay the foundation for the development of diagnostic tools, disease management strategies, and the breeding of resistant luffa varieties.

Novel genus and species of Diaporthostomataceae (Diaporthales) in China

Diaporthales is a significant fungal order comprising species that predominantly inhabit plant tissues, being pathogens, endophytes, and saprobes. Recent studies have uncovered extensive species diversity across various hosts, utilizing both morphological characteristics and molecular phylogenetic analyses. In this study, samples of leaf spots and branch cankers were collected from China, and fungal isolations were established. Species identification was conducted using a phylogenetic approach based on combined sequence data from the internal transcribed spacer (ITS) region, large subunit ribosomal DNA (LSU), the DNA-directed RNA polymerase II second largest subunit (rpb2), and translation elongation factor 1-alpha (tef1) genes, together with morphological observations. As a result, the novel genus Tiania is proposed, with three newly described species: T.chinensis, T.lithocarpicola, and T.quercicola. These species are validated by pairwise homoplasy index (PHI) analysis, ensuring robust support for their distinction. This study explores the rare family Diaporthostomataceae, providing the first descriptions of their anamorphic forms. By offering detailed morphological and molecular data, this research lays a foundation for future taxonomic and systematic studies of the Diaporthales.

Non-lichenized Cytosporella, including C.fuligomixta sp. nov., and related plant-associated and fungicolous genera are close to foliicolous, lichenized fungi (Ascomycota, Graphidales)

The genus Cytosporella includes non-lichenized, plant associated fungi producing eustromatic conidiomata, phialidic conidiophores and hyaline, ellipsoid conidia. Of the 69 names assigned to this genus in Index Fungorum, only three species are associated with sequence data. In this study, a new species: Cytosporellafuligomixta is described based on a strain isolated from the sooty mould community on Quercusrobur leaves in Poland. The phylogenetic analyses including sequences of two loci (LSU, mtSSU) showed that Cytosporella species, together with members of four other non-lichenized, plant associated or fungicolous genera, namely Cladosterigma, Neoacrodontiella, Nothoramularia and Vanderaaea, form a sister group to lichenized and lichenicolous fungi from the family Gomphillaceae and order Graphidales. Previously, Cladosterigma was resolved as a member of Gomphillaceae using multi-locus (mtSSU, SSU, LSU, ITS, rpb2, tef1) and two-locus (LSU, mtSSU) sequence analyses, while Cytosporella, Neoacrodontiella, Nothoramularia were shown to belong to this family using LSU sequence analyses. However, none of them resolved these genera as a sister group to lichenized members of Gomphillaceae. The placement of the genus Vanderaaea within Gomphillaceae is shown here for the first time. Due to phylogenetic, morphological and ecological characteristics a new subfamily Cladosterigmoideae is described for these five non-lichenized genera.

Four new species of Cryptothecia (Arthoniaceae, Ascomycota) and Myriostigma (Arthoniaceae, Ascomycota) from China, based on morphology and molecular phylogeny

In this study, morphological and molecular phylogenetic approaches were used to investigate the species diversity of Cryptothecia and Myriostigma from southern China. We found four new species of Cryptothecia and Myriostigma (C.disjecta, C.sorediatum, M.melanovillosa and M.visus-blotch). Cryptotheciadisjecta is distinguished by verrucose pseudisidia that are loosely scattered on the thallus, the upper parts of which are white or have darker dots. Cryptotheciasorediatum is distinguished by I- medulla and thalli having globose soralia. Myriostigmamelanovillosa is distinguished by thalli with black or purple dots and hyaline to pale yellow ascospores (63-71 × 26-33 µm). Myriostigmavisus-blotch is distinguished by hyaline ascospores and ascigerous areas, which have many irregular small patches that are scattered or clustered together radially elongated. In addition, a phylogenetic tree based on mtSSU, RPB2 and nuLSU illustrates the phylogenetic placement of the proposed four new taxa. Detailed descriptions of the morphological, ecological and chemical characteristics and illustrations of each species are provided. Two updated keys for all known Chinese Cryptothecia and Myriostigma species are also provided.

Unveiling four new taxa and Nigrosynnemanatarajanensis comb. nov. in Stachybotryaceae (Hypocreales) from monocotyledon plants in Guangdong Province, China

Members of Stachybotryaceae are distributed worldwide, with certain species playing a significant role as bio-degraders and some causing diseases in plants, humans, and animals. Other species within this family can be found in soil and have been reported as saprobes in various plants. In this study (2021-2022), fungal taxa resembling Stachybotryaceae, isolated from dead leaves of Agavesisalana and a dead stem of Wurfbainiavillosa in Guangdong Province, China, are identified based on morphological characteristics and molecular data. Multi-locus phylogeny based on calmodulin (cmdA), internal transcribed spacer (ITS), the large subunit nuclear rDNA (LSU), RNA polymerase II second largest subunit (rpb2), the partial translation elongation factor 1-α (tef1-α), and β-tubulin (tub2) revealed that nine strains were grouped within Stachybotryaceae. Nigrosynnemaguangdongense gen. et sp. nov., typical of Stachybotryaceae but having unusual olivaceous brown to black synnemata that are narrower towards the apex and produce phialidic, aseptate, slimy conidia in black and glistening heads, is introduced. Additionally, Brevistachyswurfbainiae and Sirastachysguangdongensis are introduced as new species. Stachybotrysmicrosporus is a new host record for Agavesisalana. The present study provides comprehensive descriptions, illustrations, and molecular data analyses of the newly discovered taxa and newly recorded species as a taxonomic and phylogenetic contribution to Stachybotryaceae. Furthermore, a new combination, Nigrosynnemanatarajanensis, is proposed for the previously described Virgatosporanatarajanensis.

New entomopathogenic species in the Clavicipitaceae family (Hypocreales, Ascomycota) from the subtropical forests of Fujian, China

Introduction

Entomopathogenic fungi play a crucial role in the ecological regulation of insect populations and can be exploited as a resource for pest control, sustainable agriculture, and natural products discovery. These fungi and their infected hosts are sometimes highly coveted as part of traditional medicine practices. Here, we sought to examine the biodiversity of entomogenous fungi in subtropical forests of China.

Methods

Fungal-infected insect specimens were collected from various sites in Fujian Province, China, and purified isolates were obtained through laboratory cultivation and isolation techniques. Molecular characterization of specific target genomic loci was performed on the fungal isolates, and used for phylogenetic analyses using Bayesian inference and maximum likelihood methods to elucidate their taxonomic relationships. Microscopy was used to describe the morphological features of the isolates.

Results

Through a comprehensive two-year survey of Fujian Province via multilocus molecular phylogenetic analysis targeting the nrSSU, nrLSU, tef1-α, rpb1, and rpb2 loci of collected specimens, we identified three novel species within the Clavicipitaceae herein described as: Albacillium fuzhouense sp. nov., Conoideocrella gongyashanensis sp. nov. and Neoaraneomyces wuyishanensis sp. nov., as well as the recently recorded, Metarhizium cicadae. Each new species was also distinguished from its closest relatives by unique morphological characteristics.

Discussion

These discoveries enrich our understanding of biodiversity within the Clavicipitaceae family and can contribute to the development of new pest control strategies and natural products discovery.

Vascular Streak Dieback: A Novel Threat to Redbud and Other Woody Ornamental Production in the United States

Eastern redbud (Cercis canadensis L.) is a popular and high-value woody ornamental plant native to the Eastern and South Central United States. In recent years, redbud production in the Southeastern United States has been greatly affected by a novel threat: vascular streak dieback (VSD). Infected plants exhibit a common set of symptoms, including leaf scorch, tip dieback, and vascular streaking that creates a marbled pattern in stem cross-section. Based on both conventional diagnosis and molecular identification, it has been found that the fungus Ceratobasidium sp. D.P. Rogers (Csp) is consistently associated with VSD-symptomatic eastern redbuds. However, the causal agent(s) of VSD has not yet been conclusively confirmed. Although eastern redbud has been the most frequently identified host tree, more than 25 other native plant genera have been confirmed to have VSD associated with Csp. The near-obligate nature of this fungus has made it challenging to culture, extract DNA, and conduct further studies to confirm its pathogenicity. This article highlights the emerging challenges of VSD, focusing on the following: (i) the recent history of VSD; (ii) the increasing importance of VSD to woody ornamental nursery production in the United States; (iii) the currently available protocols for isolating, culturing, storing, and maintaining the putative causal agent; (iv) the rapid molecular detection of Csp; (v) phylogenetic findings on the origin and relatedness of Csp to previously recorded diseases, especially VSD in cacao (Theobroma cacao L.); and (vi) preliminary results and observations from fungicide trials and cultivar screening in Tennessee. The article also outlines research needed to comprehensively understand VSD and accelerate the development of effective management strategies.

Species Diversity of Edible Mushrooms I-Four New Laccaria Species from Yunnan Province, China

As symbiotic mycorrhizal associates, species within the genus Laccaria play pivotal roles in forest ecosystems, specifically forming ectomycorrhizal relationships with the root systems of various plants. Some Laccaria species are recognized for their edibility, holding potential as a sustainable food source in the context of future food security and dietary diversification. In this study, the species diversity of Laccaria in Yunnan was investigated, and four novel species were identified. Their taxonomical positions and phylogenetic affinities were confirmed through phylogenetic analysis based on ITS, nrLSU, tef1-α, and rpb2 sequence data. Macro- and micro-morphological characteristics of the new species are also given here. Laccaria brownii sp. nov. has a dark to slightly desaturated orange pileus, stipe context broadly fistulose and soft orange, and relatively smaller cheilocystidia and pleurocystidia. Laccaria orangei sp. nov. has a hemispherical to paraboloid pileus, abundant narrowly clavate, flexuose, and branched cheilocystidia. Laccaria ruber sp. nov. pileus is red on the margin, clearly striate on the pileus surface, basidia clavate, mostly four-spored, rarely two-spored. Laccaria stipalba sp. nov. stipe surface is white, long sterigmata (4-13 μm × 2-3 μm), pleurocystidia narrowly clavate to subclavate, flexuose or mucronate, rarely branch. The descriptions, illustrations, and phylogenetic analysis results of the new taxa are provided. In addition, the new taxa are compared with closely related taxa.

Trichoderma Species from Semiarid Regions and Their Antagonism Against the Microorganisms That Cause Pepper Wilt

Chili wilt is a significant challenge in producing jalapeño peppers, which has led to the implementation of strategies to help counteract or combat the microorganisms responsible for it. One of these strategies is the use of biological control microorganisms, such as Trichoderma, a fungus recognized as a natural enemy of the microorganisms that cause chili wilt. Therefore, this study aimed to isolate and identify Trichoderma species from the soils and roots of different plants, and evaluate their antagonism against Rhizoctonia solani, Phytophthora capsici, and Fusarium sp. Due to the complexity in identifying Trichoderma at the species level, performing a multilocus phylogenetic analysis was necessary, using the ITS, RPB2, and TEF1 regions. The species isolated were T. afroharzianum, T. lentiforme, T. rifaii, T. brevicompactum, T. arundinaceum, and T. longibrachiatum. Subsequently, they were used in three antagonism tests (dual culture, non-volatile organic compounds, and volatile organic compounds) against the phytopathogenic microorganisms. The tests demonstrated that the Trichoderma isolates could inhibit the mycelial growth of all three tested pathogens, obtaining the best results with the strains T. brevicompactum (19RCS), T. lentiforme (63DPS), T. longibrachiatum (71JES), T. rifaii (77JCR), and T. afroharzianum (24RQS, 87CCS, 88CCS and 17RCS). The strain with the best results in all three tests was 17RCS.

Discovering fungal communities in roots of Zoysiajaponica and characterising novel species and their antifungal activities

Turf-grasses are economically important horticultural crops, which have been utilised by humans to improve the environment for more than a thousand years. Turf-grasses are widely distributed in landscapes, slopes and sport fields, such as golf courses. Endophytic fungi are a resource of unexplored fungal diversity with potential bioactive compounds. In this study, culture-independent ITS amplicon sequencing and culture-dependent isolation methods were used to reveal fungal community in roots of the turf-grass Zoysiajaponica. A total of 317 OTUs were identified from root samples of Z.japonica by analysis of ITS amplicon reads. Fungal community was dominated by Sordariales (32.45%), followed by Chaetothyriales (18.16%), unknown taxa in Sordariomycetes (14.63%) and Pleosporales (12.48%). During isolation, 151 endophytic fungal strains were obtained from roots of Z.japonica and a variety of taxa were found by ITS amplification and sequencing. Moreover, 11 endophytic fungal species were further characterised in this study, based on morphological characterisation and multi-loci phylogenetic analysis, including Niessliadimorphospora, a newly-recorded species in Korea and 10 novel species (Dactylariahwasunensis sp. nov., Lophiostomajeollanense sp. nov., Magnaporthiopsiszoysiae sp. nov., Poaceascomaendophyticum sp. nov., P.koreanum sp. nov., P.magnum sp. nov., P.zoysiiradicicola sp. nov., Stagonosporaendophytica sp. nov., Setophomazoysiae sp. nov. and Pseudorhypophilapoae sp. nov.). Antifungal activities of these species were tested against the turf-grass brown patch pathogen Rhizoctoniasolani AG2-2(IIIB), with S.zoysiae being the best antagonist. In addition, butanol extract from mycelia of S.zoysiae strongly inhibited R.solani AG2-2(IIIB) in vitro and in planta. The results of this study expand the biodiversity of endophytic fungi and revealed potential biological resources for future turf-grass management and bioactive compound exploitation.

Cytochalasins from the Ash Endophytic Fungus Nemania diffusa DSM 116299

The secondary metabolome of Nemania diffusa, isolated as an ash endophytic fungus, was analyzed in detail. From its cultures, a previously undescribed cytochalasin 1 was isolated using preparative HPLC, together with six known congeners: 18-dehydroxy-cytochalasin E (2), cytochalasins Z7 (3), Z8 (4), and E (5), 18-dehydroxy-17-didehydro-cytochalasin E (6), and K Steyn (7). The structures of these compounds were determined using data from high-resolution mass spectrometry (HR-MS), in combination with 1D and 2D nuclear magnetic resonance (NMR) spectroscopy. Metabolites 1-4 share a characteristic 12-membered lactone moiety, placing them within a rarely examined cytochalasin subclass. Thus, the compounds were incorporated into our ongoing screening campaign to study the structure-activity relationship of this metabolite family. We initially determined their cytotoxicity in eukaryotic mouse fibroblast L929 cells using an MTT-based colorimetric assay, and further investigated their effect on the cellular actin dynamics of the human osteosarcoma cell line U-2OS in detail. Unexpectedly, we discovered a high number of irreversible compounds (1, 2, and 4). Additionally, we highlighted specific structural features within the 12-membered cytochalasin subclass that may play a role in directing the reversibility of these compounds.

Characterization of Fungal Pathogens Causing Blueberry Fruit Rot Disease in China

Blueberry has been a burgeoning fruit in China in recent years, but its perishable nature places a constant strain on industrial development. To determine the pathogens infecting blueberry fruits, diseased samples were collected from Guizhou and Fujian Provinces. Isolates from the samples were identified by morphological characterization and phylogenetic analyses. Pathogenicity assays were conducted on fresh blueberry fruits using spore suspensions. Sixteen isolates were identified as seven species, namely, Botryosphaeria dothidea, Botrytis cinerea, Cladosporium guizhouense, Colletotrichum fioriniae, Diaporthe anacardii, Fusarium annulatum, and Neopestalotiopsis surinamensis, and their pathogenicity on blueberry fruits were confirmed following Koch's postulates. The current study reported Cladosporium guizhouense, Fusarium annulatum, and Neopestalotiopsis surinamensis for the first time on blueberry. The study (1) demonstrated that fruit rot disease results from a mixed infection of multiple pathogens; and (2) expanded the understanding of causal agents of blueberry fruit rot during the growth stage, highlighting their potential as latent pathogens that contribute to post-harvest losses. Relevant results provide a reference for the etiological research and disease management in blueberry fruit diseases.

Identification, Molecular Characterization, and Biology of a Novel Quadrivirus Infecting the Plant Fungus Allocryptovalsa sichuanensis

A novel double-stranded RNA (dsRNA) virus was isolated and described from strain ZZZ210557 of plant endophyte Allocryptovalsa sichuanensis. The dsRNA virus contains four dsRNA segments, dsRNA1 to dsRNA4, with a size range of 3.8 to 5.1 kbp. Each possesses a single large ORF and is encapsulated in isometric particles approximately 42-47 nm in diameter. Notably, the dsRNA3 encoded sequence revealed modest similarities to the amino acid sequences of RdRps predicted from the nucleotide sequences of known and suspected members of the family Quadriviridae. Phylogenetic analysis of the putative RdRp with the corresponding proteins of other quadriviruses revealed that the dsRNA virus is a new member belonging to the family Quadriviridae, tentatively named Allocryptovalsa sichuanensis quadrivirus 1 (AsQV1). All four segments of AsQV1 could be successfully cured through ribavirin treatment, whereas it likely has no apparent impact on the morphologies or virulence of the host fungus. This study is the first report of a quadrivirus isolated from the fungus A. sichuanensis, and our results enhance the diversity of the quadrivirus.

Four new species of Erioscyphella (Leotiomycetes, Helotiales) from southwestern China

Erioscyphella is found across various regions and is part of the family Lachnaceae (Helotiales). It is distinguished by its white to orange disc-shaped apothecia, white to brown receptacles, and granulated hairs that contain amorphous or resinous material. These hairs lack swelling apices and crystals. Additionally, this genus is unique for its long ascospores. In the present study, we collected eight specimens from southwestern China. Morphological and phylogenetic analyses based on the combined LSU, ITS, mtSSU and RPB2 dataset showed that our specimens represent four new species of Erioscyphella, including E.ailaoensis, E.baimana, E.gelangheica and E.tengyueica. Here, we provide complete morphological descriptions with illustrations and sequence data essential for future taxonomic and evolutionary research.

Resin outpourings on conifers are inhabited by more members of Nectriaceae (Hypocreales, Sordariomycetes) than previously thought

Resin outpourings on conifers are a quite unique habitat occurring in nature. Conifer resins are composed mainly from monoterpenes, sesquiterpenes and resin acids which are recalcitrant to microbial decomposition. Moreover, resins exhibit antimicrobial properties. Despite that, they are colonised by different microorganisms including fungi. They are called resinicolous fungi. They constitute a poorly explored group of the fungal kingdom. In this study, during investigation of resinicolous fungi in Poland, seven strains were assigned to the family Nectriaceae. Phylogenetic analyses of combined ITS, LSU, rpb2, tef1 and tub2 sequence data were used for molecular identification. As a result, two new species (including a new genus) and two known species were identified. Pulchrosporaresinae gen. et sp. nov. and Cosmosporaelegans sp. nov. were described, characterised and proposed herein. Known species such as Cosmosporaviridescens and Cosmosporellapruni were isolated from resin substrate for the first time.

Trichoderma collection from Brazilian soil reveals a new species: T. cerradensis Sp. nov

Trichoderma spp. are important biological control agents and plant growth promoters. However, only a limited number of species are used in biological control even though the genus contains more than 400 species, with most of them being mycotrophic. In this study, 97 Trichoderma isolates preserved at the EMBRAPA collection (an important source for biocontrol agents) and previously collected from several areas in Brazil were characterized which were identified using various molecular markers (internal transcribed spacers (its), translation elongation factor (tef1α), RNA polymerase II subunit (rpb2), actin (act), and calmodulin (cal). Of these, 54 isolates were found to group in the Harzianum species complex and 32 in Sect. Trichoderma. Others were distributed in the following clades: Strictipilosa complex (one isolate), Longibrachiatum (four isolates), and Brevicompactum (seven isolates). Most of the isolates were identified within 17 known species, whereas Trichoderma inhamatum and T. dorothopsis were synonymized under T. lentiforme and T. koningiopsis, respectively, based on multi-locus phylogenetic analysis and GCPRS criteria. However, two isolates formed a clade apart from previously identified species from Sect. Trichoderma and identified as a new species: T. cerradensis sp. nov. The multigenic characterization of isolates deposited in fungal culture collections is crucial for accurate identification and reveals a diverse range of Trichoderma species in Brazil.

PCR-based detection of Botryosphaeria canker pathogens in fig trees

Canker and dieback, caused by members of the Botryosphaeriaceae family, pose significant threats to plant productivity, food security, and natural ecosystems, particularly in economically important woody crops including fig trees. Detecting and identifying these pathogens is challenging due to their latent infections and the presence of multiple pathogens within the same host. In our study, we developed a PCR assay using three carefully selected primer pairs based on sequence differences in two protein-coding genes, β-tubulin and RNA polymerase II. The species-specific primers TUB-Bd1 (specific for Botryosphaeria dothidea), TUB-Np1 (specific for Neofusicoccum parvum), and RPB-Nd2 (specific for Neoscytalidium dimidiatum) effectively amplified target gene sequences in pure cultures and infected tissue samples using PCR and nested PCR conditions. The efficiency test results demonstrated that TUB-Bd1, TUB-Np1, and RPB-Nd2 primer pairs could detect specific DNA fragments at very low concentrations in nested PCR. Furthermore, we collected 180 symptomatic and asymptomatic fig samples from different regions of Fars Province, Iran. Applying the species-specific primer pair RPB-Nd2 in direct PCR led to the detection of N. dimidiatum in 25.5% of symptomatic woody samples and 13% of asymptomatic one-year-old branch samples of fig trees. This represents a significant improvement compared to the mere 6.67% detected using traditional culturing methods on PDA. Interestingly, neither B. dothidea nor N. parvum were detected in the 180 samples using nested PCR. Moreover, multiplex PCR enabled simultaneous DNA detection of the target Botryosphaeriaceae pathogens. Our findings emphasize the importance of molecular techniques for early detection of evident and latent infections caused by these three pathogens in fig trees.

Molecular Tracking of Emerging Fusarium Species in Keratitis: F. veterinarium, F. contaminatum, and F. curvatum

Fungal keratitis, which is caused primarily by Neocosmospora and Fusarium species, is a significant global health issue that affects more than a million people annually in tropical and subtropical regions. Neocosmospora solani (formerly Fusarium solani) is a leading cause of corneal infections, along with members of the Fusarium oxysporum species complex (FOSC). This study provides new insights by reporting a series of ocular fusariosis cases caused by FOSC members and presenting molecular evidence linking specific haplotypes within FOSC to human infections. We describe three cases of Fusarium keratitis selected from a comprehensive review of clinicopathological data in our institution's archives. These cases were chosen for their distinctive clinical presentations and the involvement of less common Fusarium species. Two of these patients were diagnosed with keratitis and anterior endophthalmitis, and the third patient had a corneal ulcer previously treated with topical antivirals and antibiotics. All patients were successfully treated with topical amphotericin B. The Fusarium isolates from these patients were subjected to detailed molecular characterization, including DNA sequencing (tef1α, rpb2, CaM, tub2, and LSU), amplified fragment length polymorphism (AFLP) marker analysis, and MALDI-TOF MS analysis. Remarkably, our study reports the first case of human infection by F. veterinarium, alongside cases involving F. contaminatum and F. curvatum. Furthermore, a molecular survey using haplotypic networks based on tef1α sequences identified genotypes associated with human infections and revealed the emergence of F. veterinarium clade VII. Our findings emphasize the need for vigilance regarding emerging species within the FOSC, particularly F. veterinarium. This highlights the need for improved diagnostic tools and targeted research to combat fusarioid-related infections effectively.

Redefining the clade Spirale of the genus Trichoderma by re-analyses of marker sequences and the description of new species

During a survey of the genus Trichoderma in the Brazilian ecosystem Restinga, 22 strains related to Trichoderma spirale were found on the basis of identities of tef1, the molecular marker used to discriminate species of this genus. Trichoderma spirale was described in 1991 and since then four species related to it were described and later on added to the clade Spirale. Searches for tef1 sequences assigned to T. spirale or related species in public databases recovered sequences with identities ranging from 93.5 to 100 % in comparison with the tef1 sequences of the type of the species. It clearly shows that the species diversity in this clade is higher than anticipated. These sequences originated from strains obtained in different continents suggesting that T. spirale is a highly diverse worldwide-distributed species. We present results indicating that most of these tef1 sequences represent 11 novel putative species in the Spirale clade delimited with a tef1 alignment using the programme ASAP, which is able to distinguish closely related species. In this study, two species from the Restinga ecosystem are described as Trichoderma gilbertogili sp. nov. and Trichoderma rubropilosum sp. nov. based on a polyphasic approach. The potential of these newly described species as biological control agents of two plant pathogens was assessed based on in vitro antagonism assays. Besides the description of two novel species, the other taxonomic novelties we proposed are the invalidation (nomina invalida) of the names T. inaequilaterale and T. supraverticillatum, and the transfer of T. hunanense and Trichoderma longisporum to a new clade for which we propose the name Hunanense. This study significantly improved our comprehension of the diversity in the clade Spirale.

Several Seiridium species (Sporocadaceae: Xylariales) cause cypress canker in South Africa

Cypress canker is an important fungal disease caused by at least seven different Seiridium species. The disease has been known on Cupressaceae trees in South Africa since the 1980's, but its relevance was recently accentuated with an outbreak on native Widdringtonia nodiflora trees in the Western Cape. The causal agent, S.neocupressi, was previously unknown in the country, highlighting a lack of information regarding the disease in South Africa. The aim of this study was to investigate the occurrence of cypress canker and its causal agents across the country by sampling diseased Cupressaceae trees and reconsidering the identity of Seiridium strains previously collected in the country. Phylogenetic analyses revealed five known cypress canker pathogens and two putatively novel species. Seiridium cardinale was the most frequently isolated species in the Western Cape. Only two isolates of S. neocupressi were found outside the outbreak on Widdringtonia. Seiridium unicorne was most frequently isolated in the Gauteng and Free State provinces. Seiridium cancrinum,S.kenyanum and the two undescribed species were each recovered only in localised areas. Stem inoculations on x Hesperotropsis leylandii using S. cardinale, S. neocupressi and S. unicorne strains confirmed the pathogenicity of S. cardinale and S. neocupressi. In contrast, S. unicorne strains exhibited variable levels of aggressiveness. This study represents the first extensive consideration of cypress canker in South Africa and one of few studies on this important disease in the Southern Hemisphere.

Phylogenetic analysis of termite-associated Xylaria from Africa reveals hidden diversity

Fungus-farming termite colonies host members of the genus Xylaria as stow-away fungi that emerge from deteriorating fungal gardens (combs) or dying termite nests. Fungus-farming termites originated in Africa, where the highest host diversity - eleven termite genera - exists, and later colonised parts of Asia, where five extant termite genera are known. Theory predicts that symbiont diversity should correlate with host diversity, but while 17 termite-associated Xylaria species have been described from Asia, a mere three African species have been formally described. This suggests that the diversity of termite-associated Xylaria in Africa is underestimated due to under-sampling. To test this, we obtained 34 Xylaria isolates from 20 termite colonies in Côte d'Ivoire and placed them in a multi-locus phylogenetic analysis alongside 278 Xylaria and outgroup specimens. This revealed 18 putatively novel Xylaria species, confirming our hypothesis. In addition, our findings revealed the capacity for termite-associated Xylaria species to colonize fungus gardens associated with diverse termite host genera, and that individual termite colonies can host multiple Xylaria species. Given the relatively limited scope of our sampling, including Xylaria strains derived from only four of 11 farming termite genera, it is imperative that substantial diversity likely remains to be discovered, particularly in Africa.

Alternaria Species on Convolvulus arvensis Revealed as a Potential Inoculum Source for Solanaceous Crops in Serbia

Alternaria pathogens are a global agronomic challenge affecting the health of Solanaceae crops. Crop debris, seeds, and perennial weeds are potential inoculum reservoirs, but knowledge on their relative importance remains limited. Plants of Convolvulus arvensis showing early blight and brown leaf spot symptoms were collected from in and around potato and tomato fields in Serbia, grown both in open conditions and in tunnels, in the late season of 2021 to 2022. Morphological characterization and multilocus sequence analysis were performed on collected samples, using three genes (GPD, CAL, and RPB2) for large-spored species and six genes (Alt a1, ATP, HIS3, endoPG, TEF-1, and OPA10-2) for small-spored species of Alternaria. A total of 58 strains were identified: four large-spored species (A. grandis, A. solani, A. protenta, and A. linariae) and two small-spored species (A. alternata and A. arborescens). Phylogenetic analyses of concatenated loci and haplotype network for every investigated locus revealed that large-spored isolates from C. arvensis exhibit a low genetic variability, suggesting common haplotypes in a broad solanaceous host range. Meanwhile, small-spored Alternaria isolates displayed high genetic diversity in all examined gene regions, indicating potential geographical haplotype distribution per HIS3 locus. Pathogenicity tests confirmed the virulence of all isolates on original hosts, with crop plants of potato and tomato also showing high susceptibility. Notably, this research documents six Alternaria species on C. arvensis in Serbia for the first time, significantly broadening our understanding of the pathogen's diversity and suggesting new sources of inoculum in solanaceous crops.

Two novel hyphomycetes associated with ferns from China

During an ongoing investigation of fungi associated with ferns in southwestern China, three hyphomycetes were discovered on the dead rachises of Angiopterisfokiensis and an unidentified fern. Based on morphology and multi-gene phylogenetic analyses, Arthrobotrysangiopteridis and Corynesporaseptata are introduced as new species. Arthrobotrysangiopteridis is a nematode-trapping fungus characterized by macronematous, mononematous, hyaline conidiophores, conidiogenous cells with polyblastic denticles at each node, and 0-1-septate, clavate to elongate pyriform, hyaline conidia. Corynesporaseptata features macronematous, mononematous, pale brown to dark brown conidiophores, integrated, monotretic conidiogenous cells and up to 7-distoseptate with one true septum, subcylindrical to obclavate, hyaline to pale brown conidia. Detailed descriptions and illustrations of these two new species are provided, along with morphological comparisons of the new taxa with closely related species.

Morphological and phylogenetic analyses reveal four novel species of Distoseptispora (Distoseptisporaceae, Distoseptisporales) from southern China

Saprobic hyphomycetes with high density and species diversity were observed on plant debris. During our mycological surveys in southern China, numerous strains were isolated from dead branches of unidentified plants in the forest of Jiangxi and Fujian provinces, China. Phylogenetic analyses of ITS, LSU, RPB2, and TEF1 sequence data using maximum-likelihood (ML) and Bayesian inference (BI) methods revealed the systematic placement of several Sporidesmium-like species within Distoseptispora. Based on morphological characteristics and molecular evidence, four new species of Distoseptispora, namely D.fujianensis, D.ganzhouensis, D.nanpingensis and D.subtropica, are introduced, and two known species, D.clematidis and D.yunjushanensis, are reported. This study enhances our knowledge of the species diversity of Distoseptispora in southern China.

Characterization and Identification of Neocosmospora solani and Fusarium oxysporum Causing Root Necrosis and Wilting of Orange Trees in Chile

Orange trees (Citrus × sinensis (L.) Osbeck) are the third-most cultivated citrus fruit species in Chile. In recent years, several trees in three orange orchards of 'Lane late' and 'Fukumoto' cultivars grafted on 'Robidoux' trifoliate orange (Poncirus trifoliata (L.) Raf.) have shown chlorosis, canopy reduction, wilting, root necrosis, defoliation, and plant death symptoms. This study aims to characterize the morphological symptoms observed in diseased orange trees in central Chile and identify the fungal pathogens that are involved. Isolation and morphological characterization of the pathogens were conducted by using different culture media. A total of 53 isolates were obtained, morphologically characterized and 12 isolates were selected for molecular identification. The isolates were identified using ITS, TEF-1α, and RPB2 regions. Two Fusarium species complexes were identified, Neocosmospora (Fusarium) solani (FSSC) and F. oxysporum (FOSC), based on >99% identity. Pathogenicity tests were conducted on young orange seedlings under greenhouse conditions. Results indicated that two months post inoculation, trifoliate orange seedlings displayed root rot symptoms such as necrosis, vascular discoloration, and wilting. FSSC and FOSC were re-isolated from necrotic seedling roots and identified through a combination of morphological traits and molecular techniques. This is the first detailed report of this disease, attributed to FSSC and FOSC, in orange orchards in Chile. These diagnostic results represent the first step in developing adequate phytosanitary programs for managing this disease.

Unveiling Paramyrothecium kamalii (Stachybotryaceae) as a novel foliar fungal pathogen on Matourea azurea in Kerala, India, based on morpho-cultural, pathological and molecular phylogenetic evidences

During recent survey for the investigation of foliar fungi in Kerala, India, a new species of foliicolous hyphomycete, Paramyrothecium kamalii was discovered on living leaves of Matourea azurea (Plantaginaceae) based on morpho-cultural characteristics and multigene (ITS, LSU, cmdA, tub2, and rpb2) phylogenetic analysis; is described, illustrated and discussed. In vitro Pathogenicity tests were performed and confirmed the pathogenic nature of the fungus, thereby fulfilling Koch's postulates. Phylogenetically, P. kamalii forms a distinct clade, closely related to P. verroridum, P. indicum, and P. roridum. However, it differs morphologically by having longer conidiophores and conidia and lacks setae, unlike the closer species. The identification of P. kamalii as a new foliar pathogen provides critical insights for surveillance and effective control measure of this foliar disease of M. azurea in tropical ecosystems.

Four new araneogenous species and a new genus in Hypocreales (Clavicipitaceae, Cordycipitaceae) from the karst region of China

The karst region in southwestern China is one of the biodiversity hotspots in the world with rich fungal diversity but under-studied. Four fungal species belonging to Chlorocillium (Clavicipitaceae) and Gamszarella (Cordycipitaceae) were isolated from dead spiders. Morphological comparisons, phylogenetic analyses and a PHI analysis based on multigene datasets support the establishment of these new species viz., Chlorocilliumguizhouense sp. nov., C.vallense sp. nov., Gamszarellasinensis sp. nov., and G.vallensis sp. nov. are introduced. A new genus, Neogamszarella, is proposed to accommodate Gamszarellaantillana, which is phylogenetically distinct from Gamszarella s. str. Our results revealed that further attention needs to be paid to the diversity of araneogenous fungi in the karst regions of southwestern China.

Morpho-phylogenetic analyses of two novel edible mushrooms from China and a mini review of Lyophyllum (Agaricales, Lyophyllaceae) cultivation and bioactivities

Lyophyllum plays an important role in the natural ecosystem and has significant economic value. Some species of this genus have been cultivated in Asia, America, and Europe. This study describes four edible species of Lyophyllum, two of which were newly discovered. Lyophyllumedulis has a dark grayish orange pileus, a grayish orange upper part of the stipe, and globose, subglobose to broadly ellipsoid basidiospores, while L.sinense has a dark gray-orange when injured pileus, dark grayish orange points and lines on the stipe surface, and quadrangular to broadly fusiform basidiospores. Molecular phylogenetic analyses using the internal transcribed spacer ITS1-5.8S-ITS2 ribosomal RNA (ITS), the large subunit ribosomal RNA (LSU), the second-largest subunit of RNA polymerase II (rpb2), and translation elongation factor 1-alpha (tef1-α) indicated that L.edulis is related to L.shimeji, L.heimogu, and L.decastes, and L.sinense has an affinity to L.bulborhizum and L.nigrum. We also summarize the cultivation techniques of the two edible species, L.shimeji and L.decastes.

Four New or Newly Recorded Species from Freshwater Habitats in Jiangxi Province, China

Freshwater fungi consist of a highly diverse group of organisms in freshwater habitats worldwide. During a survey of fungal diversity in freshwater habitats across different regions of Jiangxi Province, China, four freshwater fungi were collected. To study their phylogenetic relationships, the internal transcribed spacer (ITS1-5.8S-ITS2), large subunit (28S, LSU), small subunit (18S, SSU), and RNA polymerase II subunit (RPB2) genes were selected for phylogenetic analyses. Based on morphology coupled with phylogenetic analysis, these strains were confirmed to belong to Phaeoisaria, Pleurothecium, and Pseudodactylaria. Among them, three fungi were confirmed as the new species, namely, Pleurothecium lignicola (Pleurotheciaceae), Pseudodactylaria jiangxiensis (Pseudodactylariaceae), and Ps. lignicola (Pseudodactylariaceae). One species was identified as Phaeoisaria filiformis (Pleurotheciaceae), a new record of this species in China. All species were compared with other similar species, and detailed descriptions, illustrations, and phylogenetic data were provided.