Sanghuangporus toxicodendri Sheng H. Wu, B.K. Cui & Guo Z. Jiang

Wu, Sheng-Hua, Chang, Chiung-Chih, Wei, Chia-Ling, Jiang, Guo-Zheng & Cui, Bao-Kai, 2019, Sanghuangporus toxicodendri sp. nov. (Hymenochaetales, Basidiomycota) from China, MycoKeys 57, pp. 101-111 : 101

Sanghuangporus toxicodendri Sheng H. Wu, B.K. Cui & Guo Z. Jiang sp. nov. Figures 2 , 3

Type.

CHINA. Hubei Province: Shennongjia Forestry District, Songbai Town, 1200 m, on living Toxicodendron sp. trunk, May 2018, Wu 1805-3 (holotype, TNM F0032663).

Etymology.

The epithet refers to the host genus.

Description.

Basidiocarps perennial, effused-reflexed to pileate, applanate, semicircular, adaxially slightly concave, woody hard. Pilei projecting 4-6 cm, up to 18 cm wide and up to 6 cm thick at base. Pileal surface grayish black to blackish brown, glabrous, occasionally cracked, concentrically zonate and sulcate; margin generally obtuse, concolorous or brownish yellow. Pore surface brownish yellow, yellowish brown, brownish or rusty brown, somewhat glancing, darkening in KOH; pores 7-9 per mm, circular. Context homogeneous, 1-5 mm thick or almost invisible, brownish yellow or brownish, with blackish crust at pileus parts. Tubes concolorous with pore surface, 1-5 cm thick, usually with several growth layers.

Hyphal system dimitic in both context and trama, generative hyphae simple-septate; tissue darkened in KOH. Context generative hyphae yellowish, brownish yellow or yellowish brown, moderately ramified, 2-3 μm diam., slightly thick-walled or with walls up to 1 μm thick; skeletal hyphae yellowish brown to brownish, fairly straight, rarely ramified, 2-4 μm diam., with 0.5-1.3 μm thick walls or subsolid. Tube generative hyphae yellowish brown to yellowish, moderately ramified, 2-3 μm diam., slightly thick-walled or with walls up to 1 μm thick; skeletal hyphae yellowish brown to brownish, fairly straight, rarely ramified, 2-4 μm diam., with 0.8-1.3 μm thick walls or subsolid. Hymenial setae ventricose, dark brown, 26-42 × 7-10 μm. Cystidioles with tapering or abruptly narrow apices, colorless, thin-walled, 10-20 × 3-3.5 μm. Basidia clavate, 10-12 × 4-4.5 μm, thin-walled, 4-sterigmate or occasionally 2-sterigmate; sterigmata up to 6 μm long. Basidiospores broadly ellipsoid, smooth, brownish yellow, slightly thick-walled, inamyloid, non-dextrinoid, somewhat cyanophilous, (3.2 –)3.5– 4 × (2.7 –)2.8–3(– 3.2) μm, L = 3.72 ± 0.21 μm, W = 2.94 ± 0.11 μm, Q = 1.27 (n = 30, holotype: Wu 1805-3).

Ecology and distribution.

On trunk of Toxicodendron sp. Hitherto only known from Shennongjia Forestry District, Hubei province, China.

Additional specimens examined (paratypes).

CHINA. Hubei Province: Shennongjia Forestry District, Songbai Town, 1200 m, on living Toxicodendron sp. trunk, May 2018, Wu 1805-1 (TNM F0032661), Wu 1805-2 (TNM F0032662), Wu 1805-4 (TNM F0032664), Wu 1805-5 (TNM F0032665); July 2018, Wu 1807-2 (TNM F0032666), Wu 1807-3 (TNM F0032667), Wu 1807-4 (TNM F0032668).

Figures

Figure 2. Basidiocarp. Sanghuangporus toxicodendri (holotype, Wu 1805 - 3).

Figure 3. Sanghuangporus toxicodendri (holotype, Wu 1805 - 3) A skeletal hyphae from context B generative hyphae from context C skeletal hyphae from trama D generative hyphae from trama E generative hyphae from dissepiments F setae G cystidioles H basidia I basidiospores. Scale bars: 10 μm.