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The identity, ecology and distribution of Polypyrenula (Ascomycota: Dothideomycetes): a new member of Trypetheliaceae revealed by molecular and anatomical data

Published online by Cambridge University Press:  04 March 2020

Ricardo Miranda-González*
Departamento de Botánica, Instituto de Biología, Universidad Nacional Autónoma de México, Apdo. Postal 70-3627, C. P. 04510, Ciudad de México, México Department of Botany and Plant Pathology, Oregon State University, 2082 Cordley Hall, Corvallis, OR97331-2902, USA
André Aptroot
Laboratório de Botânica/Liquenologia, Instituto de Biociências, Universidade Federal de Mato Grosso do Sul, Avenida Costa e Silva s/n, Bairro Universitário, CEP 79070-900, Campo Grande, Mato Grosso do Sul, Brazil
Robert Lücking
Botanischer Garten und Botanisches Museum, Freie Universität Berlin, Königin-Luise-Straße 6–8, 14195Berlin, Germany
Adam Flakus
Laboratory of Lichenology, W. Szafer Institute of Botany, Polish Academy of Sciences, Lubicz 46, PL–31–512 Kraków, Poland
Alejandrina Barcenas-Peña
Departamento de Botánica, Instituto de Biología, Universidad Nacional Autónoma de México, Apdo. Postal 70-3627, C. P. 04510, Ciudad de México, México Science and Education, The Field Museum, 1400 South Lake Shore Drive, Chicago, IL60605-2496, USA
María de los Ángeles Herrera-Campos
Departamento de Botánica, Instituto de Biología, Universidad Nacional Autónoma de México, Apdo. Postal 70-3627, C. P. 04510, Ciudad de México, México
Author for correspondence: Ricardo Miranda-González. E-mail:


New collections are reported of the monospecific genus Polypyrenula, an apparently extinct and doubtfully lichenized fungus, typically classified in the Pyrenulaceae. Anatomical studies reveal that it is facultatively lichenized. The structure of its hamathecium suggests affinities with Dothideomycetes rather than Eurotiomycetes. Molecular analysis using nuLSU and mtSSU markers demonstrates for the first time its inclusion in Trypetheliaceae, outside the core genera as part of the early diverging lineages in this family. The known distribution of Polypyrenula is extended to Mexico and South America, new information on its phorophyte associations is provided, and the name Polypyrenula sexlocularis is reinstated as the correct name for this species.

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Copyright © British Lichen Society 2020

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The identity, ecology and distribution of Polypyrenula (Ascomycota: Dothideomycetes): a new member of Trypetheliaceae revealed by molecular and anatomical data
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