Phylogenetic and morphological studies in Xylodon (Hymenochaetales, Basidiomycota) with the addition of four new species

Abstract

Xylodon (Hymenochaetales, Basidiomycota) is the largest segregate genus of Hyphodontia s.l. Based on molecular and morphological data, 77 species are accepted in Xylodon to date. Phylogenetic analyses of ITS and 28S sequences, including 38 new ITS and 20 28S sequences of Xylodon species, revealed four species new to science. The new taxa X.exilis, X.filicinus, X.follis and X.pseudolanatus from Taiwan, Nepal, Réunion, Belize, and USA are described and illustrated. In addition, species concepts for Odontiavesiculosa from New Zealand and Xylodonlanatus from U.S.A. are revised and the new name X.vesiculosus is proposed. Phylogenetic analyses of the ITS region placed X.spathulatus, X.bubalinus and X.chinensis in a strongly supported clade and demonstrated that they are conspecific. Palifer and Odontiopsis are synonymised under Xylodon based on morphological and sequence data. The following new combinations are proposed: X.erikssonii, X.gamundiae, X.hjortstamii, X.hyphodontinus, X.septocystidiatus and X.verecundus. Line drawings of X.cystidiatus, X.hyphodontinus, X.lanatus and X.vesiculosus, as well as photographs of X.raduloides basidiomata, are provided. A key to X.lanatus and similar species is presented.

Morphological and molecular identification of four new resupinate species of Lyomyces (Hymenochaetales) from southern China

“…Hyphodontia s.l. is an extensively studied group of Hymenochaetales (Dai 2012;Viner et al 2018;Riebesehl et al 2019), but the Chinese species diversity is still not well known, especially in subtropical and tropical areas. The four new Lyomyces species here described are from the subtropics.…”

“…Molecular studies on Lyomyces and related genera have been carried out recently Yurchenko et al 2017;Viner et al 2018;Riebesehl et al 2019). Riebesehl and Langer (2017) indicated that Hyphodontia s.l.…”

Additions to the Knowledge of Corticioid Xylodon (Schizoporaceae, Hymenochaetales): Introducing Three New Xylodon Species from Southern China

“…The previous research showed that Xylodon was strongly supported to be a monogenetic genus in Hyphodontia s.l. by the mycologists [14,23,30]. According to our result based on present sequence data (Figure 2), X. gossypinus, X. macrosporus, and X. sinensis are nested into Xylodon with strong supports.…”

Linking morphological and molecular sources to disentangle the case of Xylodon australis

“…The identity of all samples named under X. australis was confirmed by molecular data (see Supplementary Figs. S1-S3 on line) and their phylogenetic position among other Xylodon species was according to Riebesehl et al 17 . The number of constant, variable, uninformative and informative characters under maximum parsimony analyses are indicated in the legend of the Supplementary Figs.…”