Sanghuangporus quercicola L. Zhu & B.K. Cui, 2017

Zhu, Lin, Xing, Jia-Hui & Cui, Bao-Kai, 2017, Morphological characters and phylogenetic analysis reveal a new species of Sanghuangporus from China, Phytotaxa 311 (3), pp. 270-276 : 271-273

Sanghuangporus quercicola L. Zhu & B.K. Cui , sp. nov. ( Figs. 2 , 3 )

Basidiomata perennial, mostly pileate, occasionally effused-reflexed, pores angular to circular (7–9 per mm). Hyphal system monomitic in context, dimitic in trama, generative hyphae simple septate. Basidiospores subglobose to ovoid, pale yellowish, fairly thick-walled, smooth, moderately CB+, IKI–.

MycoBank no: 820457

Type. — CHINA. Henan Province, Neixiang County, Baotianman Nature Reserve, on dead tree of Quercus , 25 August 2006, Li 1149 (Holotype, BJFC 004803!).

Etymology.— Quercicola (Lat.) : refers to occurrence on Quercus .

Fruitbody. —Basidiomata perennial, mostly pileate, occasionally effused-reflexed, without odor or taste, hard corky when fresh, becoming hard corky to woody hard upon drying. Pilei applanate, usually dimidiate or semicircular, projecting up to 3 cm, 5 cm wide and 2.5 cm thick at base. Pileal surface yellowish brown, cinnamon brown to dark brown, concentrically zonate and sulcate, velutinate when juvenile, becoming glabrous and slightly rimose with age; margin obtuse, lemon-yellow when juvenile, becoming yellowish brown with age. Pore surface buff-yellow to cinnamon brown, glancing; sterile margin distinct, bright yellow to yellowish brown, up to 2 mm wide; pores angular to circular, 7–9 per mm; dissepiments thin, entire. Context yellowish brown, woody hard, up to 2 cm thick. Tubes concolorous with pore surface, hard corky, up to 5 mm long, tube layers distinct.

Hyphal structure. —Hyphal system monomitic in context, dimitic in trama; generative hyphae simple septate; tissues darkening but otherwise unchanged in KOH.

Context. —Generative hyphae yellow to golden brown, thin- to thick-walled, frequently simple septate and branched, more or less straight, loosely interwoven, 2–4 μm in diam; hyphae in the white mycelia strands hyaline, thin- to slightly thick-walled, readily septate, moderately branched, 2–4.2 μm in diam.

Tubes. —Generative hyphae colorless to yellowish brown, thin- to thick-walled, frequently simple septate, occasionally branched, 1.4–3 μm in diam; skeletal hyphae dominant, yellowish brown, thick-walled with a wide to narrow lumen, usually unbranched, interwoven, 1.8–4 μm in diam. Hymenial setae abundant, mostly ventricose or subulate, dark brown, thick-walled, 14–35 × 6–9 μm. Cystidia absent, cystidioles present, fusoid, thin-walled, 12–18 × 2.5–5 μm. Basidia barrel-shaped, with four sterigmata and a simple septum at the base, 5–9 × 4–5 μm; basidioles mostly capitate, in size similar to basidia. Irregular crystals frequently present in trama and hymenia.

Spores. —Basidiospores subglobose to ovoid, pale yellowish, fairly thick-walled, smooth, moderately CB+, IKI–, (2.5–)3–3.9(–4) × (2.2–)2.4–2.8(–3) μm, L = 3.23 μm, W = 2.66 μm, Q = 1.18–1.24 (n = 90/3).

Additional specimens (paratypes) examined.— CHINA. Henan Province, Neixiang County, Baotianman Nature Reserve, on fallen trunk of Quercus , 31 August 2005, Li 445 (BJFC 004799!). Chongqing, Nanchuan, Jinfoshan Nature Reserve, on fallen trunk of Quercus , 19 July 2014, Dai 13947 (BJFC 017677!).

Figures

FIGURE 2. Basidiomata of Sanghuangporus quercicola. A. Li 1149; B. Li 445; C, D. Pore surface of Li 1149. Bars: A–C=1 cm; D=5 mm.

FIGURE 3. Microscopic structures of Sanghuangporus quercicola (drawn from the holotype).a. Basidiospores; b. Basidia and basidioles; c. Cystidioles; d. Hymenial setae; e. Hyphae from trama; f. Hyphae from context. Bars: a=5 μm; b–f=10 μm.