Systematic placement of Lagarobasidium cymosum and description of two new species

ABSTRACT

Lagarobasidium cymosum is a rare corticioid species with characteristic morphology different from other Lagarobasidium species. We used nuc 5.8S rDNA, nuc 28S rDNA, and mt 12S rDNA loci to infer the phylogenetic position of L. cymosum. Our analyses suggest that it belongs to Xylodon but is not closely related to any of the other taxa referred to Lagarobasidium. Molecular and morphological information shows that the traditional concept of L. cymosum covers at least three species: Xylodon acuminatus from the Neotropics, X. cymosus from North America, and X. subtilissimus distributed in both Europe and North America. Lagarobasidium calongei is transferred to Xylodon, and DNA barcodes for Lyomyces incrustatus and Xylodon hjortstamii are published for the first time.

KEYWORDS:

• Hymenochaetales
• Lyomyces
• Peniophora cymosa
• phylogeny
• Xylodon
• 4 new taxa

ACKNOWLEDGMENTS

We thank the anonymous reviewers of the manuscript for their useful comments. Alexander Sennikov (Helsinki) gave us valuable advice in nomenclatural questions. Anton Savchenko (Tartu), Evgeniy Dunayev (Young Naturalist Club of the Zoological Museum, Lomonosov Moscow State University), and Sergio Pérez Gorjón (Salamanca) provided us with valuable fungal collections. With the permission of the NHMO DNA Bank at the Natural History Museum, University of Oslo, Audun Schrøder-Nielsen and Lars Erik Johannessen kindly provided us with an important DNA extraction.

DISCLOSURE STATEMENT

No potential conflict of interest was reported by the author(s).

FUNDING

This research was supported by a University of Helsinki three-year research project (O.M., I.V.) and grants from Societas pro Fauna et Flora Fennica (I.V.).