Studies in Mycology (2018) 90, 1-69

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N. Valenzuela-Lopez, J.F. Cano-Lira, J. Guarro, D.A. Sutton, N. Wiederhold, P.W. Crous and A.M. Stchigel (2018)
Coelomycetous Dothideomycetes with emphasis on the families Cucurbitariaceae and Didymellaceae
Studies in Mycology 90 (1), 1-69
Abstract: The taxonomy of the coelomycetes has undergone dramatic changes in recent years, but remains controversial due to the high number of taxa involved, their poor morphological differentiation, the rare occurrence of the sexual morphs, and rapid loss of fertility in vitro. In the present study, we revisited the families Cucurbitariaceae and Didymellaceae (Pleosporales, Dothideomycetes), which include numerous plant pathogens, endophytic species associated with a wide host range, and saprobes. The taxonomy of two of the most relevant genera, i.e. Phoma and Pyrenochaeta, remains ambiguous after several phylogenetic studies, and needs further revision. We have studied a total of 143 strains of coelomycetes from clinical or environmental origin, by combining the LSU, ITS, tub2 and rpb2 sequences for a multi-locus analysis and a detailed morphological comparison. The resulting phylogenetic tree revealed that some fungi previously considered as members of Cucurbitariaceae represented five different families, and four of them, Neopyrenochaetaceae, Parapyrenochaetaceae, Pseudopyrenochaetaceae and Pyrenochaetopsidaceae, are proposed here as new. Furthermore, 13 new genera, 28 new species, and 20 new combinations are proposed within the Pleosporineae. Moreover, four new typifications are introduced to stabilise the taxonomy of these fungi.
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Database assignments for author(s): Pedro W. Crous

Research topic(s) for pests/diseases/weeds:
identification/taxonomy


Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.


Pseudopyrenochaeta lycopersici Tomato (Solanum lycopersicum) Germany
Phoma herbarum Rosa (crop) Netherlands
Epicoccum sorghinum Citrus (genus) France
Epicoccum sorghinum Sorghum (crop) Puerto Rico
Juxtiphoma eupyrena Potato (Solanum tuberosum) Netherlands
Didymella glomerata Chrysanthemum (genus) Netherlands
Remotididymella destructiva Tomato (Solanum lycopersicum) Netherlands
Neocucurbitaria cava Oak (Quercus) Italy
Pyrenochaetopsis indica Sugarcane (Saccharum officinarum) India
Neopyrenochaeta acicola
Ectophoma multirostrata Cucumber (Cucumis sativus) Netherlands
Nothophoma quercina Ukraine