Wrightoporia srilankensis Y.C. Dai & Yuan Yuan, 2020

Zhou, Meng, Chen, Jiajia & Yuan, Yuan, 2020, A new species of Wrightoporia (Wrightoporiaceae, Basidiomycota) from Sri Lanka, Phytotaxa 437 (2), pp. 105-112 : 108

Wrightoporia srilankensis Y.C. Dai & Yuan Yuan sp. nov. Figs. 2–3

MycoBank no: MB 833493

Differs from other Wrightoporia species by its annual and resupinate basidiocarps with buff yellow pores, both generative hyphae and skeletals bearing yellowish and irregular crystals, the absence of gloeoplerous hyphae, the presence of cystidioles, and broadly ellipsoid basidiospores measuring 3.8–4.2 × 2.8–3.2 µm.

Type:— Sri Lanka. Avissawella, Salgala Forest , on rotten angiosperm stump, 3 rd March 2019, Dai 19621 (holotype, BJFC030715 ) .

Etymology:— Srilankensis (Lat.): referring to the occurrence of the species in Sri Lanka.

Description:— Basidiocarps annual, resupinate, easily separable from the substrate, soft-corky upon drying, 13 cm long, 7 cm wide, up to 5 mm thick at center. Pore surface buff yellow when dry; pores angular, 1–2 per mm; dissepiments thin to slightly thick-walled, lacerate. Sterile margin distinct, usually with rhizomorphs. Tubes concolorous with the pore surface, soft-corky, up to 4 mm long. Subiculum buff to honey yellow, soft-cottony, about 1 mm thick.

Hyphal system dimitic; generative hyphae with clamp connections; skeletal hyphae CB+, dextrinoid; tissues becoming dark brown in KOH. Subiculum g enerative hyphae frequent, hyaline, thin- to slightly thick-walled, moderately branched, occasionally encrusted with yellowish, irregular crystals, 1.5–2.5 µm in diam; skeletal hyphae common, hyaline to light orange, thick-walled with a narrow lumen, rarely branched, flexuous, interwoven, rarely encrusted with hyaline to yellowish, irregular crystals, 1.8–2.5 µm in diam. Tubes generative hyphae infrequent, thinto slightly thick-walled, frequently branched, partly encrusted with hyaline to yellowish, irregular crystals, 1–2.5 µm in diam; skeletal hyphae dominant, hyaline to light orange, thick-walled with a narrow lumen, rarely branched, flexuous, interwoven, sometimes encrusted with hyaline, irregular crystals, 1.5–2.5 µm in diam; cystidioles present, fusoid to clavate, hyaline, thin-walled, 17–23 × 2.8–3.5 µm; basidia subclavate to barrel-shaped, bearing four long sterigmata and a basal clamp connection, 18–21 × 4–6 µm; basidioles in shape similar to basidia, but slightly smaller. Basidiospores broadly ellipsoid, hyaline, thin- to slightly thick-walled, finely asperulate, some collapsed, IKI+, CB+, (3.5–)3.8–4.2(–4.5) × 2.8–3.2 (–3.5) µm, L = 3.99 µm, W = 3.03 µm, Q = 1.31–1.32 (n = 90/3).

Additional specimens examined (paratypes): Sri Lanka, Dombagaskarda Forest Reserve , on rotten angiosperm wood, 27 th February 2019, Dai 19500 ( BJFC030717 ) ; Mitirgala Nissarana Vanaga Forest , on rotten angiosperm stump, 4 th March 2019, Dai 19667, 19668 ( BJFC030719 , BJFC030720 ) ; Vissawella, Salgala Forest , on rotten angiosperm stump, 3 rd March 2019, Dai 19620 ( BJFC030718 ) .

Figures

FIGURE 2. Basidiocarps of Wrightoporia srilankensis (Holotype). a: Fresh basidiocarps. b: Dried basidiocarps. Scale bars: a–b = 1 cm. Photos by: Yu-Cheng Dai (Fig. 2a) and Yuan Yaun (Fig. 2b).

FIGURE 3. Microscopic structures of Wrightoporia srilankensis (Holotype). a: Basidiospores. b: Basidia. c: Basidioles. d: Cystidioles. e: Hyphae from subiculum. f: Hyphae from trama. Scale bars: a–f = 10 μm. Drawings by: Meng Zhou.