@ARTICLE{TreeBASE2Ref19074, author = {Kazuaki Tanaka and Vadim Mel'nik and Maasa Kamiyama and Kazuyuki Hirayama and Takashi Shirouzu}, title = {Molecular phylogeny of two coelomycetous genera with star-shaped conidia, Prosthemium and Asterosporium on Fagales tree}, year = {2011}, keywords = {Anamorphic fungi, Ascomycetes, Diaporthales, Pleomassaria, Pelosporales}, doi = {10.1139/B10-078}, url = {http://}, pmid = {}, journal = {Botany}, volume = {88}, number = {}, pages = {1057--1071}, abstract = {Prosthemium (teleomorph: Pleomassaria) and Asterosporium (teleomorph: unknown) are coelomycetous genera with stellate conidia on Fagales trees. Their morphological resemblance suggests their close relationship, but phylogenetic relatedness remains unknown. They have been distinguished either on the basis of conidiomatal morphology (pycnidia in Prosthemium and acervuli in Asterosporium), or by their differing conidial septation (euseptate in Prosthemium and distoseptate in Asterosporium). To reveal their phylogenetic affinities and clarify reliable distinguishing phenotypical characters, five species of Prosthemium and two of Asterosporium were investigated using sequences of the SSU, LSU, ITS nrDNA, and β-tubulin gene from 42 isolates of these species. The analyses revealed the following: 1) Asterosporium typified by A. asterospermum on Fagus is a member of the Sordariomycetes and is distinct from Prosthemium belonging to the Dothideomycetes: 2) A. betulinum on Betula species should be excluded from Asterosporium and transferred to Prosthemium as Prosthemium neobetulinum nom. nov.: 3) conidial septation does not seem have a diagnostic value, whereas conidiomatal morphology is useful in distinguishing both genera: 4) number and length of conidial arms are useful criteria in distinguishing Prosthemium species. A new species, Prosthemium intermedium, found on both B. ermanii and B. maximowicziana, is described and illustrated.} }

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