Junghuhnia nandinae F. Wu, P. Du & X.M. Tian, 2020

Du, Ping, Wu, Fang & Tian, Xue-Mei, 2020, Three new species of Junghuhnia (Polyporales, Basidiomycota) from China, MycoKeys 72, pp. 1-16 : 1

Junghuhnia nandinae F. Wu, P. Du & X.M. Tian sp. nov. Figures 4 , 5

Etymology.

Refers to the species growing on Nandina domestica .

Basidiomata.

Annual, resupinate, coriaceous, without odour or taste when fresh, hard corky when dried, 30 cm length, 3 cm width and 1 mm thick. Pore surface flesh-pink when fresh, pink to salmon when dried; margin distinct, white and nearly 3 mm width; pores round to angular, 6-8 per mm; dissepiments thin, entire. Subiculum buff, paler than tubes, corky when dried, nearly 0.5 mm thick. Tubes concolorous with pore surface, corky, nearly 0.5 mm length.

Hyphal system.

Hyphal system dimitic; generative hyphae with clamp connections, skeletal hyphae IKI-, CB+; tissue unchanged in KOH.

Subiculum.

Dominated by skeletal hyphae; generative hyphae hyaline, thin-walled, unbranched, 2-3 µm in diam.; skeletal hyphae thick-walled to subsolid, flexuous, unbranched, gelatinised, interwoven, 2.5-4 µm in diam.

Tubes.

Trama dominated by skeletal hyphae; generative hyphae hyaline, thin-walled, rarely branched, 2-3 µm in diam.; skeletal hyphae thick-walled to subsolid, unbranched, flexuous, more or less gelatinised, interwoven, 2.5-3.5 µm in diam. Skeletocystidia clavate, thick-walled, originated from trama, apex covered with crystals, embedded amongst trama and dissepiments or projecting into hymenium, 22-45 × 6-8 µm. Basidia clavate, bearing four sterigmata and a basal clamp connection, 8-11 × 4-4.6 µm; basidioles in shape similar to basidia, but smaller.

Spores.

Basidiospores ellipsoid, hyaline, thin-walled, smooth, IKI-, CB-, (2.5-)2.6-3.2(-3.3) × (1.6-)1.8-2(-2.1) µm, L = 2.97 µm, W = 1.92 µm, Q = 1.54 (n = 60/2).

Materials examined.

China, Chongqing, Nanchuan County, Jinfoshan Forest Park, on dead tree of Nandina domestica , 1.XI.2019 Dai 21107 (holotype in BJFC, isotype in IFP) and Dai 21108 (paratype in BJFC).

Figures

Figure 4. Basidiomata of Junghuhnia nandinae (holotype Dai 21107). Scale bar: 8 cm.

Figure 5. Microscopic assessment of Junghuhnia nandinae structures (holotype Dai 21107) a basidiospores b basidia c basidioles d skeletocystidia e hyphae from subiculum f hyphae from trama.