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Hymenoscyphus crataegi (Helotiales), a new species from Spain and its phylogenetic position within the genus Hymenoscyphus.

H.-O. Baral, R. Galán, J. López, F. Arenal, M. Villarreal, V. Rubio, J. Collado, G. Platas & F. Peláez (2006).

Sydowia 58 (2): 145 - 162.

Hymenoscyphus crataegi is described as new to science. The species was found growing on Crataegus monogyna leaves collected in Spain. It is characterized by homopolar, non-scutuloid ascospores, being acute at both ends, with a high lipid content of large guttules, in combination with asci arising from simple septa. The species is morphologically close to H. macroguttatus nom. nov. and H. caudatus, but molecular phylogenetic analysis of the ITS 1-5.8S-ITS 2 region of the rRNA operon suggested a higher affinity with H. immutabilis.

Key words: Hymenoscyphus crataegi, Hymenoscyphus macroguttatus, phylogeny, taxonomy.

 

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