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Xylodon raduloides Riebesehl & E. Langer 2017

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Xylodon raduloides Riebesehl & E. Langer, Mycol. Prog. 16 649 (2017)
Xylodon raduloides Riebesehl & E. Langer 2017

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Present
New Zealand
Political Region
NZ use of the name incorporates the minor phylogenetic differeces associated with X. laurentianus, X. patagonicus and X. novozelandicus [JAC]

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Riebesehl & E. Langer
Riebesehl & E. Langer
2017
649
replacement name
ICN
species
Xylodon raduloides

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raduloides

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MYRTACEAE. Eucalyptus spp.: New South Wales, Macquarie Pass. South Australia, Kuitpo.
Hymenophore annual, membranous-ceraceous, adherent, effused forming linear areas to 20 x 5 cm; hymenial surface buff, becoming reddish-brown, deeply areolately creviced when colliculose; margin thinning out, fibrillose, adherent, concolorous. Context cream, 120-200 µm thick, basal layer of a few repent hyphae, intermediate layer of loosely arranged erect hyphae; generative hyphae 2-2.5 µm diameter, walls 0.25 µm thick, naked, with clamp connections. Hymenial layer to 20 µm deep, a close palisade of basidia, paraphyses, and paraphysate hyphae. Basidia clavate, 10-14 x 4.5-5 µm, bearing 4 spores; sterigmata erect, slender, to 5 µm long. Paraphyses subclavate, scanty, 8-10 x 3.5-4 µm. Paraphysate hyphae filiform, projecting to 10 µm, abundant. Spores suballantoid or pip-shaped, 9-10 x 4.5-5 µm, walls smooth, hyaline, 0.2 µm thick.
DISTRIBUTION: North America, Australia.
HABITAT: Effused on bark or decorticated dead branches.
Close to C. scutellare, differing in the reddish-brown colour of the hymenial surface, narrower context hyphae, smaller differently shaped basidia, and pip-shaped spores. The surface becomes deeply areolately creviced, when segments tend to lift, giving the surface a colliculose appearance.
TYPE LOCALITY: Pennsylvania, U.S.A.
The current ITS-based phylogeny covering the most comprehensive sampling of Xylodon till now recovered the four lineages of X. laurentianus, X. novozelandicus, X. patagonicus and X. raduloides, each not receiving strong support; the lineage of X. subtropicus being composed of two original Asian specimens described by Chen et al. [15] occupied a basal position of the four lineages (Figure 1). Like the phylogeny based on ITS region (Figure 1), that based on three genes also recovered the four lineages, and no one was strongly supported, neither was the clade being composed of these four lineages (Figure 2). Alternatively, these four lineages together with the basal lineage of X. subtropicus formed a strongly supported clade (Figure 2). In the phylogeny based on seven genes (Figure 5), the two original specimens of X. subtropicus with only ITS and nLSU regions available were not included; the lineage of X. raduloides was strongly supported, whereas those of X. laurentianus, X. novozelandicus and X. patagonicus were weakly to moderately supported; the clade consisting of these four lineages was strongly supported. In these three phylogenies (Figures 2 and 5), the newly sequenced Australian specimens merged in the lineage of X. novozelandicus. Besides the topologies, the branch lengths among these lineages are also too short to clearly distinguish species and fall within the infraspecific distances observed in several other well accepted species in the genus (Figures 2 and 5). Taking into consideration the morphological similarity, the current phylogenies and the low level of divergence, we consider X. laurentianus, X. novozelandicus, X. patagonicus, X. raduloides and X. subtropicus to be conspecific with the last one as the correct name.

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Schizopora radula (Pers.) Hallenb. 1983
Xylodon raduloides Riebesehl & E. Langer 2017
Xylodon raduloides Riebesehl & E. Langer
Xylodon raduloides Riebesehl & E. Langer 2017
Xylodon raduloides Riebesehl & E. Langer
Xylodon raduloides Riebesehl & E. Langer 2017

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f056cde5-fce0-4f9b-ab8f-96d095ab875a
scientific name
Names_Fungi
1 October 2017
17 December 2024
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