<i>Phialophora</i>section<i>Catenulatae</i>disassembled: New genera, species, and combinations and a new family encompassing taxa with cleistothecial ascomata and phialidic asexual states

Untereiner, Wendy A.; Yue, Qiulin; Chen, Li; Li, Yán; Bills, Gerald F.; Štěpánek, Václav; Réblová, Martina

doi:10.1080/00275514.2019.1663106

Cited by 9 publications

(8 citation statements)

References 74 publications

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“…Within the Leotiomycetes, all clades identified by Johnston and colleagues (88) and were represented here, are recovered. The family containing Tetracladium , Vandijckellaceae (88, 89), was included in an analysis based on 15 concatenated sequences (88). The tree herein differs from that result in the branching order of the Vandijckellaceae and helotioid taxa.…”

Section: Discussionmentioning

confidence: 99%

Broad geographical and ecological diversity from similar genomic toolkits in the ascomycete genusTetracladium

Anderson

Marvanová

2020

Preprint

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18The ascomycete genus Tetracladium is best known for containing aquatic hyphomycetes, which are 19 important decomposers in stream food webs. However, some species of Tetracladium are thought 20 to be multifunctional and are also endobionts in plants. Suprisingly, Tetracladium sequences are 21 increasingly being reported from metagenomics and metabarcoding studies of both plants and soils 22 world-wide. It is not clear how these sequences are related to the described species and little is 23 known about the non-aquatic biology of these fungi. Here, the genomes of 24 Tetracladium strains, 24 including all described species, were sequenced and used to resolve relationships among taxa and to 25 improve our understanding of ecological and genomic diversity in this group. All genome-sequenced 26 Tetracladium fungi form a monophyletic group. Conspecific strains of T. furcatum from both aquatic 27 saprotrophic and endobiont lifestyles and a putative cold-adapted clade are identified. Analysis of 28 ITS sequences from water, soil, and plants from around the world reveals that multifunctionality 29 may be widespread through the genus. Further, frequent reports of these fungi from extreme 30 environments suggest they may have important but unknown roles in those ecosystems. Patterns of 31 predicted carbohydrate active enzymes (CAZyme) and secondary metabolites in the Tetracladium 32 genomes are more similar to each other than to other ascomycetes, regardless of ecology, 33 suggesting a strong role for phylogeny shaping genome content in the genus. Tetracladium genomes 34 are enriched for pectate lyase domains (including PL3-2), GH71 α-1,3-glucanase domains and CBM24 35 α-1,3-glucan/mutan binding modules, and both GH32 and CBM38, inulinase and inulin binding 36 modules. These results indicate that these fungi are well-suited to digesting pectate and pectin in 37 leaves when living as aquatic hyphomycetes, and inulin when living as root endobionts. Enrichment 38 for α-1,3-glucanase domains may be associated with interactions with biofilm forming 39 microorganisms in root and submerged leaf environments. 42 important decomposers in stream ecosystems. The group is polyphyletic, its members are classified 43 in various orders and families of Ascomycetes and Basidiomycetes. These fungi thrive on leaves and 44 other plant debris that enter streams and other water bodies from terrestrial plants. In the process, 45 carbon and nutrients from recalcitrant plant compounds, including cellulose and lignin, become 46 accessible to diverse consumers in the stream food web (reviewed in (1, 2)). Up to 99% of the carbon 47 in some streams enters as plant debris that is largely inaccessible to aquatic consumers without the 48 degradative activity of these fungi (3, 4). Aquatic hyphomycete adaptations to stream environments 49 include the production of asexual propagules (conidia) while under water. These spores are often 50 branched, typically tetraradiate, or sigmoid, readily detachable from the fungus (e.g. from 51 conidiophores) and passi...

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Section: Discussionmentioning

confidence: 99%

Broad geographical and ecological diversity from similar genomic toolkits in the ascomycete genusTetracladium

Anderson

Marvanová

2020

Preprint

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“…Solenopeziaceae sensu Ekanayaka et al (2019) was shown to be polyphyletic, the core genera Trichopeziza , Trichopezizella and Lasiobelonium forming a monophyletic clade basal to Lachnaceae sensu Johnston et al (2019) and the taxa here accepted as Tricladiaceae forming a monophyletic clade basal to Helotiaceae sensu Johnston et al (2019) . Note that a second monophyletic basal clade within Helotiaceae sensu Johnston et al 2019 was formally named Pleuroascaceae by Untereiner et al (2019) .…”

Section: Resultsmentioning

confidence: 99%

“…2019) as Helotiaceae — Bryoscyphus , Dicephalospora , Glarea (represented by ex-type specimen of the type species), Hymenoscyphus , and Phaeohelotium . One of the basal subclades contained the morphologically divergent genera Connersia and Pleuroascus (traditionally placed in Pseudeurotiaceae because of their cleistothecial ascomata), and this clade has since been formally named Pleuroascaceae ( Untereiner et al 2019 ). A second basal subclade contained fungi with aquatic hyphomycete-like asexual spores in genera such as Tricladium and Mycofalcella , and it is this clade that is here formally named as Tricladiaceae .…”

Section: Discussionmentioning

confidence: 99%

Tricladiaceae fam. nov. (Helotiales, Leotiomycetes)

Johnston¹,

Baschien²

2020

Fungal Systematics and Evolution

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To resolve the polyphyletic nature of Solenopeziaceae as it was originally circumscribed, we establish a new family Tricladiaceae for those genera originally placed in Solenopeziaceae that have aquatic hyphomycete-like asexual morphs and/or a sexual morph with glabrous apothecia. These include Cudoniella, Geniculospora, Graddonia, Halenospora, Mycofalcella, Spirosphaera, and Tricladium. Solenopeziaceae is confined to the genera Lasiobelonium, Solenopezia, Trichopeziza, and Trichopezizella, all of which have a sexual morph having apothecia with smooth-walled hairs. This taxonomy is supported by a multi-gene analysis using up to 15 genes, with a few of the taxa placed on the basis of a separate ITS phylogeny. Tricladiaceae forms a monophyletic clade with a basal sister relationship to Pleuroascaceae plus Helotiaceae; Solenopeziaceae forms a monophyletic clade with a basal sister relationship to Lachnaceae.

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“…2019 ) are listed in Table 2 . The LSU, SSU, the mitochondrial small subunit (mitSSU) 18S rRNA gene and rpb2 sequences of representative species belonging to the Helotiales were obtained from our study ( Untereiner et al. 2019 ) and selected according to Johnston et al.…”

Section: Methodsmentioning

confidence: 99%

“… Rivera and Seifert, 2011 , Stielow et al., 2015 , Wang et al., 2019 ). The mitSSU marker is an additional gene that has been used to resolve the relationships of members of the Helotiales ( Han et al., 2014 , Untereiner et al., 2019 ).…”

Section: Methodsmentioning

confidence: 99%

New insights into the systematics of Bactrodesmium and its allies and introducing new genera, species and morphological patterns in the Pleurotheciales and Savoryellales (Sordariomycetes)

Réblová

Hernández-Restrepo

Fournier³

et al. 2020

Studies in Mycology

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The newly discovered systematic placement of Bactrodesmium abruptum , the lectotype species of the genus, prompted a re-evaluation of the traditionally broadly conceived genus Bactrodesmium . Fresh material, axenic cultures and new DNA sequence data of five gene regions of six species, i.e. B. abruptum , B. diversum, B. leptopus , B. obovatum , B. pallidum and B. spilomeum , were studied. Bactrodesmium is a strongly resolved lineage in the Savoryellales ( Sordariomycetes ), supported by Bayesian and Maximum Likelihood methods. The genus Bactrodesmium is emended and delimited to hyphomycetes characterised by sporodochial conidiomata, mononematous often fasciculate conidiophores, holoblastic conidiogenesis and acrogenous, solitary, dry, pigmented, transversely or rarely longitudinally septate conidia. The conidia are seceding rhexolytically, exhibiting multiple secession patterns. An identification key to 35 species accepted in Bactrodesmium is given, providing the most important diagnostic characters. Novel DNA sequence data of B. longisporum and B. stilboideum confirmed their placement in the Sclerococcales ( Eurotiomycetes ). For other Bactrodesmium , molecular data are available for B. cubense and B. gabretae , which position them in the Dothideomycetes and Leotiomycetes , respectively. All four species are excluded from Bactrodesmium and segregated into new genera, Aphanodesmium , Gamsomyces and Kaseifertia . Classification of 20 other species and varieties not recognised in the genus is discussed. Based on new collections of Dematiosporium aquaticum , the type species of Dematiosporium , the genus is emended to accommodate monodictys-like freshwater lignicolous fungi of the Savoryellales characterised by effuse colonies, holoblastic conidiogenous cells and dictyosporous, pigmented conidia with a pore in each cell. Study of additional new collections, cultures and DNA sequence data revealed several unknown species, which are proposed as taxonomic novelties in the Savoryellales and closely related Pleurotheciales . Ascotaiwania latericolla , Helicoascotaiwania lacustris and Pleurotheciella erumpens are described from terrestrial, lentic and lotic habitats from New Zealand and France, respectively. New combinations are proposed for Helicoascotaiwania...

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PhialophorasectionCatenulataedisassembled: New genera, species, and combinations and a new family encompassing taxa with cleistothecial ascomata and phialidic asexual states

Cited by 9 publications

References 74 publications

Broad geographical and ecological diversity from similar genomic toolkits in the ascomycete genusTetracladium

Broad geographical and ecological diversity from similar genomic toolkits in the ascomycete genusTetracladium

Tricladiaceae fam. nov. (Helotiales, Leotiomycetes)

New insights into the systematics of Bactrodesmium and its allies and introducing new genera, species and morphological patterns in the Pleurotheciales and Savoryellales (Sordariomycetes)

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