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Phylogenetic relationships of some members in the genus Hymenoscyphus (Ascomycetes, Helotiales)

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Abstract:

The relationships among some species of Hymenoscyphus and a few genera in other families of the Helotiales with somewhat similar excipular structure were investigated based on sequence analyses of the rDNA ITS1-5.8S-ITS2 region. The phylogenetic trees were established with Lachnum spartinae and L. cf. pygmaeum as outgroup. Two clades were recognized within Hymenoscyphus. Hymenoscyphus fructigenus, the lectotype of the genus, together with H. caudatus, H. cf. fructigenus, H. fucatus, H. cf. menthae, and H. scutulus, as well as H. epiphyllus, H. immutabilis, H. lasiopodius, H. serotinus, and H. globus, represent a monophyletic group. Hymenoscyphus ericae , H. sp. G1, H. rhodoleucus, and Calycina herbarum form the other clade. Hymenoscyphus caudatus is possibly a species complex. Hymenoscyphus globus is described as a new species. The Ericaceae-associated species and Calycina herbarum treated formerly as members of Hymenoscyphus should be excluded from the genus and the family Helotiaceae. The new genus Rhizoscyphus is established to accommodate H. ericae and a related species.

Keywords: DNA SEQUENCING; HYMENOSCYPHUS GLOBUS; PHYLOGENY; R ERICAE; R. MONOTROPAE; RDNA ITS1-5 8S-ITS2 REGION; RHIZOSCYPHUS

Document Type: Research Article

DOI: https://doi.org/10.1127/0029-5035/2004/0078-0475

Publication date: 2004-05-01

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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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