A new species of Rhytidhysteron (Ascomycota: Patellariaceae) from Colombia, with a provisional working key to known species in the world

Soto-Medina, Edier; Lücking, Robert

doi:10.18257/raccefyn.423

Cited by 7 publications

(6 citation statements)

References 24 publications

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“…J , Xylaria polymorpha (stromata bearing ascomata). K , Rhytidhysteron columbiense (ascomata); this conspicuous saprotrophic genus contains numerous unrecognized species based on ITS (Soto-Medina and Lücking 2017 ). L , Neocosmospora vasinfecta (perithecia); this genus is one example of competing solutions to ranking clades in Fusarium s.lat.…”

Section: Introductionmentioning

confidence: 99%

Unambiguous identification of fungi: where do we stand and how accurate and precise is fungal DNA barcoding?

et al. 2020

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True fungi (Fungi) and fungus-like organisms (e.g. Mycetozoa, Oomycota) constitute the second largest group of organisms based on global richness estimates, with around 3 million predicted species. Compared to plants and animals, fungi have simple body plans with often morphologically and ecologically obscure structures. This poses challenges for accurate and precise identifications. Here we provide a conceptual framework for the identification of fungi, encouraging the approach of integrative (polyphasic) taxonomy for species delimitation, i.e. the combination of genealogy (phylogeny), phenotype (including autecology), and reproductive biology (when feasible). This allows objective evaluation of diagnostic characters, either phenotypic or molecular or both. Verification of identifications is crucial but often neglected. Because of clade-specific evolutionary histories, there is currently no single tool for the identification of fungi, although DNA barcoding using the internal transcribed spacer (ITS) remains a first diagnosis, particularly in metabarcoding studies. Secondary DNA barcodes are increasingly implemented for groups where ITS does not provide sufficient precision. Issues of pairwise sequence similarity-based identifications and OTU clustering are discussed, and multiple sequence alignment-based phylogenetic approaches with subsequent verification are recommended as more accurate alternatives. In metabarcoding approaches, the trade-off between speed and accuracy and precision of molecular identifications must be carefully considered. Intragenomic variation of the ITS and other barcoding markers should be properly documented, as phylotype diversity is not necessarily a proxy of species richness. Important strategies to improve molecular identification of fungi are: (1) broadly document intraspecific and intragenomic variation of barcoding markers; (2) substantially expand sequence repositories, focusing on undersampled clades and missing taxa; (3) improve curation of sequence labels in primary repositories and substantially increase the number of sequences based on verified material; (4) link sequence data to digital information of voucher specimens including imagery. In parallel, technological improvements to genome sequencing offer promising alternatives to DNA barcoding in the future. Despite the prevalence of DNA-based fungal taxonomy, phenotype-based approaches remain an important strategy to catalog the global diversity of fungi and establish initial species hypotheses.

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Section: Introductionmentioning

confidence: 99%

Unambiguous identification of fungi: where do we stand and how accurate and precise is fungal DNA barcoding?

et al. 2020

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“…Therefore, species in which the size of spores overlap, have been clarified by molecular methods and the use of molecular markers, such as ITS, LSU, elongation factor 1 alpha (TEF1), amongst others. For example, in the case of R. rufulum, catalogued as a species complex based on morphology, the fungal barcodes have been helpful in describing different species that are morphologically similar (Boehm et al 2009b;Murillo et al 2009;Yacharoen et al 2015;Doilom et al 2016;Thambugala et al 2016;Soto-Medina and Lücking 2017). In recent years, part of the taxonomy has been resolved using collections from different countries around the globe.…”

Section: Discussionmentioning

confidence: 99%

“…Finally, Cobos-Villagrán et al (2020), for the Mexican specimens, report ascomata of 1000-3000 µm, ascospores of 22.4-30.4 µm and orange-reddish, yellow or black epithecia changing to magenta in reaction with KOH. These morphological variations within R. rufulum have caused confusion in various fungal collections around the world and, as a result, they have been grouped into a complex of species (Boehm et al 2009b;Murillo et al 2009;Yacharoen et al 2015;Doilom et al 2016;Thambugala et al 2016;Soto-Medina and Lücking 2017).…”

Section: Introductionmentioning

confidence: 99%

Three new species of Rhytidhysteron (Dothideomycetes, Ascomycota) from Mexico

Cobos-Villagrán

Valenzuela

Hernández‐Rodríguez

et al. 2021

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The genus Rhytidhysteron is characterised by forming navicular to apothecial hysterothecia, exposing the green, yellow, orange, red, vinaceous or black colours of the hymenium which generally releases pigments in the presence of KOH. The exciple is smooth or striated, the asci bitunicate and ascospores have 1–5 transverse septa. To date, twenty-six Rhytidhysteron species have been described from the Tropics. The present study aims to describe three new species in the Neotropics of Mexico based on molecular methods and morphological features. Illustrations and a taxonomic key are provided for all known species of this genus. Rhytidhysteron cozumelense from the Isla Cozumel Biosphere Reserve, R. esperanzae from the Sierra Juárez, Oaxaca and R. mesophilum from the Sierra Madre Oriental, Hidalgo are described as new species. With the present study, the number of species of Rhytidhysteron known from Mexico is now increased to eight.

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“…Species of Rhytidhysteron are widely distributed in 33 countries and on 52 hosts [ 6 , 18 , 25 , 26 ]. Members of Rhytidhysteron play an indispensable role as saprobes, endophytes, and weak pathogens on woody plants in both terrestrial and marine habitats, and some are rarely found as human pathogens [ 6 , 16 , 18 , 25 , 27 ].…”

Section: Introductionmentioning

confidence: 99%

Additions to Rhytidhysteron (Hysteriales, Dothideomycetes) in China

Dai

Mapook

et al. 2023

JoF

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In this study, twelve terrestrial hysteriaceous saprobic fungi growing on different pieces of dead wood were collected from Yunnan Province, China. All hysteriaceous strains isolated in this study tallied with the general characteristics associated with Rhytidhysteron. Detailed morphological characteristics and combined multigene phylogeny of LSU, ITS, SSU, and TEF showed that the twelve hysteriaceous fungi strains represent four distinct new species, and seven new host or geographical records of Rhytidhysteron. Based on morphological and phylogenetic evidence, the four new species (Rhytidhysteron bannaense sp. nov., R. coffeae sp. nov., R. mengziense sp. nov., and R. yunnanense sp. nov.) expand the number of species of Rhytidhysteron from thirty-three to thirty-seven, while seven new geographical records expand the records of Rhytidhysteron in China from six to thirteen. In addition, 10 new Rhytidhysteron host records are reported for the first time, thus expanding the known hosts for Rhytidhysteron from 52 to 62. Full descriptions, images of the morphology, and phylogenetic analyses to show the position of the Rhytidhysteron taxa are provided. In addition, the present study summarizes the main morphological characteristics, host associations, and locations of this genus.

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A new species of Rhytidhysteron (Ascomycota: Patellariaceae) from Colombia, with a provisional working key to known species in the world

Cited by 7 publications

References 24 publications

Unambiguous identification of fungi: where do we stand and how accurate and precise is fungal DNA barcoding?

Unambiguous identification of fungi: where do we stand and how accurate and precise is fungal DNA barcoding?

Three new species of Rhytidhysteron (Dothideomycetes, Ascomycota) from Mexico

Additions to Rhytidhysteron (Hysteriales, Dothideomycetes) in China

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