Abstract
A new species of Stamnaria is described based on morphology and molecular data from a collection made in West Siberia. Stamnaria yugrana is differentiated by lanceolate, strongly protruding paraphyses and comparatively narrow, fusoid-clavate ascospores. The apothecia are urn-shaped due to a prominent and even collar as in S. persoonii. The species grows on fallen side branches of Equisetum sylvaticum, a rarely recorded host for Stamnaria. The authors formally describe the new species and provide colour illustrations. In addition, the literature is reviewed on previously described species of Stamnaria. Phylogenetic reconstruction of the Stamnaria lineage, based on the ITS ribosomal DNA, strongly supports the three currently recognised species: S. americana, S. persoonii and S. yugrana.
Highlights
IntroductionDuring ongoing studies of the Helotiales (see Baral and Haelewaters 2015, Baral et al 2015), material of a species of Stamnaria Fuckel, which had been collected and morphologically documented by one of the authors (NVF), was investigated by molecular
On fallen side branches of Equisetum sylvaticum L. lying amongst other forest litter in a mixed coniferous-deciduous forest; Biological Collection of Yugra State University (YSU-F-03519)
It is impossible to assess whether this report represents S. persoonii or S. yugrana because the collection does not seem to have been preserved
Summary
During ongoing studies of the Helotiales (see Baral and Haelewaters 2015, Baral et al 2015), material of a species of Stamnaria Fuckel, which had been collected and morphologically documented by one of the authors (NVF), was investigated by molecular. After the first collection of the species in June 2008, the same locality was visited in June 2012, February 2014 and May 2015. During all these visits, abundant apothecia were observed. The species was always found growing on Equisetum sylvaticum This plant species had rarely been mentioned before as a host for the genus Stamnaria (Sydow 1898: 432, S. equiseti; Jaap 1922: 15, S. persoonii). It was decided to formally describe this fungus as a new species based on morphological and molecular characteristics
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