Name: Sanghuangporus weigelae
Author: (T. Hatt. & Sheng H. Wu) Sheng H. Wu, L.W. Zhou & Y.C. Dai
Citation: MycoBank no.: MB 812151
MycoBank no.: MB 561767
Carpophorum perennium, sessilium, effuso-reflexum vel pileatum, imbricatum. Facies pororum fulvus; pori rotundi,
5–7 per mm. Systema hypharum monomiticum in con- textum, dimiticum in tramum, hyphae septatae sine fibulis, hyphae contextum 2–4 μm in diam, hyphae generatoriae tramum 2–2.5 μm, hyphae skeletales tramum 2–3 μm. Sporae late ellipsoideae, hyalinae, crassitunicatae, IKI–, CB+, 3– 3.8×2.3–3 μm.
Type CHINA. Guizhou Province, Jiangkou County, Fanjingshan Nature Reserve, living angiosperm tree, 21. VIII.2010 Yuan 5526 (holotype).
Etymology tenuicontextus (Lat.): referring to the thin context.
Fruitbody Basidiocarps perennial, sessile, effused-reflexed to pileate, imbricate, without odour or taste and woody hard when fresh, woody hard and light in weight when dry. Pilei applanate, projecting up to 4 cm long, 9.5 cm wide and 4 cm thick at base. Pileal surface vinaceous brown to mouse-grey, velutinate, becoming glabrous with age, concentrically sulcate and zoned, cracking irregularly,
usually covered by mosses; margin orange-brown, obtuse. Pore surface yellowish brown, shining; sterile margin distinct, cinnamon-buff, up to 2 mm wide; pores circular, 5–7 per mm; dissepiments thin, entire. Context cinnamon, up to 3 mm thick, woody hard, duplex, with a thin black line between upper velutinate part and context, the black line becoming thick and forming a black crust in old basidiocarps, lower context woody hard, up to 2 mm thick,
Fig. 2 The ML tree for Inono- tus s. s. inferred from nLSU rDNA sequences. Bootstrap values (not less than 50%) are indicated as percentages at the nodes
upper velutinate crust up to 1 mm thick. Tubes concolorous with context, woody hard, distinctly stratified, tube layers separated by a thin cinnamon context, annual layers up to 2 mm thick.
Hyphal structure Hyphal system monomitic in context, dimitic in trama; generative hyphae simple septate; all hyphae IKI–; tissue darkening but otherwise unchanged in KOH.
Context Generative hyphae yellowish brown, fairly thick- walled with a wide lumen to thick-walled with a narrow lumen, straight, unbranched, frequently septate, interwoven, 2–4 μm in diam; hyphae in the black zone dark brown, distinctly thick-walled with a narrow lumen, strongly agglutinate, interwoven.
Tubes Generative hyphae infrequent, hyaline, thin-walled, CB+, occasionally branched, frequently septate, straight, 2– 2.5 μm in diam; skeletal hyphae dominant, yellowish brown, thick-walled with a narrow lumen, sometimes subsolid, straight, rarely branched, occasionally septate, interwoven, 2–3 μm in diam. Hymenial setae frequent, subulate, tapering to apex, dark brown, thick-walled, 17– 28 × 5–10 μm; hyphoid setae absent; cystidia absent; fusoid cystidioles occasionally present; basidia barrel-shaped, bearing four sterigmata and a simple septum at the base,5–7 × 4–5 μm; basidioles in slightly smaller; rhomboid crystals occasionally present.
Spores Basidiospores broadly ellipsoid, hyaline, thick- walled, smooth, IKI–, moderately CB+, 3–3.8(–4) × (2.1–) 2.3–3(–3.1) μm, L=3.38 μm, W=2.66 μm, Q=1.27 (n= 30).
Type of rot. White rot.