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2018•Mycological ProgressOpen access

Three new species of Stigmatodiscus from Mallorca (Spain)

Hermann Voglmayr, Angel Pintos Amengual

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Abstract

During a survey on corticolous Dothideomycetes in Mallorca, several collections with ascomata, asci, and ascospores matching the genus Stigmatodiscus (Stigmatodiscales, Dothideomycetes) were revealed, which did not fit any described species. Therefore, these collections were cultured and sequenced, and a multigene matrix of four loci (nuc18S-ITS-28S rDNA, rpb2 , tef1 and tub2 ) was produced. Based on the results of the phylogenetic analyses of this matrix and of morphological investigations, three new species ( Stigmatodiscus labiatus , S. oculatus , and S. pinicola ) are described and illustrated, Asterodiscus is synonymised with Stigmatodiscus and the new combination S. tamaricis is proposed. A key to all currently known species of Stigmatodiscus is provided.

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During a survey on corticolous Dothideomycetes in Mallorca, several collections with ascomata, asci, and ascospores matching the genus Stigmatodiscus (Stigmatodiscales, Dothideomycetes) were revealed, which did not fit any described species. Therefore, these collections were cultured and sequenced, and a multigene matrix of four loci (nuc18S-ITS-28S rDNA, rpb2 , tef1 and tub2 ) was produced. Based on the results of the phylogenetic analyses of this matrix and of morphological investigations, three new species ( Stigmatodiscus labiatus , S. oculatus , and S. pinicola ) are described and illustrated, Asterodiscus is synonymised with Stigmatodiscus and the new combination S. tamaricis is proposed. A key to all currently known species of Stigmatodiscus is provided.

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Available abstract

During a survey on corticolous Dothideomycetes in Mallorca, several collections with ascomata, asci, and ascospores matching the genus Stigmatodiscus (Stigmatodiscales, Dothideomycetes) were revealed, which did not fit any described species. Therefore, these collections were cultured and sequenced, and a multigene matrix of four loci (nuc18S-ITS-28S rDNA, rpb2 , tef1 and tub2 ) was produced. Based on the results of the phylogenetic analyses of this matrix and of morphological investigations, three new species ( Stigmatodiscus labiatus , S. oculatus , and S. pinicola ) are described and illustrated, Asterodiscus is synonymised with Stigmatodiscus and the new combination S. tamaricis is proposed. A key to all currently known species of Stigmatodiscus is provided.

Key concepts: Dothideomycetes, Biology, Ascocarp, Botany, Taxonomy (biology), Phylogenetic tree, Key (lock), Genus

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