Morphological and phylogenetic characterization of fungi within Hymenochaetales: Introducing two new species from southern China

Two new wood-inhabiting fungal species, Lyomyces niveus and L.
ochraceoalbus spp. nov. are proposed based on a combination of
morphological and molecular evidence.
Lyomyces ochraceoalbus is characterised by
resupinate basidiomata with tuberculate, cracking hymenial
surface, clavate basidia with a median
constriction, gathering numerous irregular crystals and
thin-walled basidiospores with one or two globules.
Lyomyces niveus is characterised by
resupinate basidiomata, smooth to grandinioid
hymenial surface, presence of three kinds of cystidia, and broadly
ellipsoid basidiospores. Sequences of ITS and nLSU gene regions
were generated, and phylogenetic analyses were performed with maximum
likelihood, maximum parsimony and Bayesian inference methods. The
phylogenetic reconstruction of Schizoporaceae based on a concatenated
ITS+nLSU dataset showed that two new species nested in Lyomyces.
A second phylogenetic analysis, of the genus Lyomyces, demonstrated that
multiple isolates of L. niveus forms a monophyletic
lineage and is sister to a clade
comprising of L. crustosus, L.
juniperi, L. ochraceoalbus, and L.
vietnamensis. Moreover, L. ochraceoalbus is closely
related to L. crustosus.