Abstract
The ectomycorrhizal basidiomycetes genus Thelephora has been understudied in subtropical ecosystems. Many species of Thelephora are important edible and medicinal fungi, with substantial economic value. Two new Thelephora species, T. grandinioides and T. wuliangshanensis spp. nov. are proposed here based on a combination of morphological features and molecular evidence. Thelephora grandinioides is characterized by laterally stipitate basidiocarps with a grandinoid hymenial surface, a monomitic hyphal system with clamped generative hyphae, and the presence of tubular and septated cystidia and subglobose to globose basidiospores measuring as 5.3–7.4 × 4–6.5 µm. Thelephora wuliangshanensis is characterized by infundibuliform basidiocarps, radially black striate on the pileus, a smooth, umber to coffee hymenial surface, a monomitic hyphal system with thick-walled generative hyphae, and basidiospores that turn greenish grey to buff in 5% KOH. Phylogenetic analyses of rDNA internal transcribed spacer region (ITS) and nuclear large subunit region (nrLSU) showed that the two new Thelephora are phylogenetically distinct: T. grandinioides is sister to T. aurantiotincta and T. sikkimensis, while T. wuliangshanensis is sister to a clade comprising T. austrosinensis and T. aurantiotincta with high support as well.
Highlights
Thelephora Ehrh. ex Willd., the genus type of Thelephoraceae Chevall. is one of the most important taxa in basidiomycetes [1,2,3,4,5]
Thelephora is typified by T. terrestris Ehrh. ex Willd. [22], and the genus is characterized by its diverse forms of basidiomycetes as stereoid, clavarioid, cantharelloid, spathulate, pleuropodally pileate to resupinate; hymenophore smooth to slightly wrinkled and often cyanescent in KOH; pileus surface glabrous to strigose, even or faintly ribbed or papillose; hymenium continuous, usually on inferior side, sometimes amphigenous in some species; hyphal system monomitic with clamped generative hyphae; basidia 4-spored; basidiospores subhyaline to brownish, ornamented, typically muricate, verruculose or echinulate, even or slightly rough-walled in a few species, and inamyloid [1,3,12,22]
The internal transcribed spacer region (ITS)+nuclear large subunit region (nrLSU) dataset had an aligned length of 1887 characters, of which 1514 characters are constant, 123 are variable and parsimony-uninformative, and 250 are parsimony-informative
Summary
Thelephora Ehrh. ex Willd., the genus type of Thelephoraceae Chevall. is one of the most important taxa in basidiomycetes [1,2,3,4,5]. Is one of the most important taxa in basidiomycetes [1,2,3,4,5]. [22], and the genus is characterized by its diverse forms of basidiomycetes as stereoid, clavarioid, cantharelloid, spathulate, pleuropodally pileate to resupinate; hymenophore smooth to slightly wrinkled and often cyanescent in KOH; pileus surface glabrous to strigose, even or faintly ribbed or papillose; hymenium continuous, usually on inferior side, sometimes amphigenous in some species; hyphal system monomitic with clamped generative hyphae; basidia 4-spored; basidiospores subhyaline to brownish, ornamented, typically muricate, verruculose or echinulate, even or slightly rough-walled in a few species, and inamyloid [1,3,12,22]. Index Fungorum [28] shows
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