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Polyphyly of Halosarpheia (Halosphaeriales, Ascomycota): implications on the use of unfurling ascospore appendage as a systematic character

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Partial nuclear large subunit ribosomal DNA of Cucullosporella mangrovei, Halosarpheia cincinnatula, H. spartinae, H. unicaudata, H. viscidula, Phaeonectriella lignicola and Tirispora unicaudata was sequenced and analysed together with 25 other sequences from the Halosphaeriales to determine: 1) their affinity with other Halosarpheia species and 2) the relationships between genera with unfurling ascospore appendages. Halosarpheia cincinnatula, H. unicaudata and H. viscidula form a well-supported monophyletic group with O . monosemeia but with no affinity to H. fibrosa (type species of Halosarpheia). Halosarpheia spartinae constitutes part of this clade but its position is only weakly supported. Cucullosporella mangrovei is closely related to H. fibrosa but they are not monophyletic. Phaeonectriella lignicola and T. unicaudata cluster with Lignincola laevis and Nimbospora effusa respectively, but with weak support. Falcatispora gen. nov. is proposed to accommodate H. cincinnatula, H. unicaudata and H. viscidula, while Matsusphaeria gen. nov. is erected for H. spartinae, based on the significant morphological differences between these taxa and H. fibrosa.
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Document Type: Research Article

Publication date: August 1, 2003

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  • Nova Hedwigia is an international journal publishing original, peer-reviewed papers on current issues of taxonomy, morphology, ultrastructure and ecology of all groups of cryptogamic plants, including cyanophytes/cyanobacteria and fungi. The half-tone plates in Nova Hedwigia are known for their high quality, which makes them especially suitable for the reproduction of photomicrographs and scanning and transmission electron micrographs.
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