Phlebiopsis lacerata C.L. Zhao, 2020

Xu, Tai-Min, Zeng, Yuan-Fang, Cheng, Yu-Hui & Zhao, Chang-Lin, 2020, Phlebiopsis lacerata sp. nov. (Polyporales, Basidiomycota) from southern China, Phytotaxa 440 (4), pp. 268-280 : 274

Phlebiopsis lacerata C.L. Zhao , sp. nov. ( Figs. 3 , 4 , 5 )

MycoBank no.: MB 834941

Type: CHINA, Yunnan Province, Puer, Jingdong County, Wuliangshan National Nature Reserve, on angiosperm fallen branch, 3 October 2017, CLZhao 3692/ SWFC 3692 (holotype, SWFC!).

Etymology.— Lacerata (Lat.) : referring to the lacerate hymenophore.

Basidiomata. —Annual, resupinate to effuse-reflexed, subceraceous when fresh, turning to leather upon drying, up to 15 cm long, 4 cm wide, 3 mm thick. Pilei often laterally fused. Pileal surface tomentose, buff to ochraceous when fresh and grey ochraceous upon drying. Pores poroid when juvenile in margin, 1–2 per mm, dissepiments thin, lacerated and splitting to spines or odontioid with age, white to cream when fresh, turning to cream to violaceous upon drying. Sterile margin distinct, white.

Hyphal structure.— Hyphal system monomitic; generative hyphae simple septate, thick-walled, branched, 3–5.5 µm diam, IKI–, CB –; tissues unchanged in KOH.

Hymenium. —Cystidia conical, thick-walled, apically encrusted with large and heavy crystal, 50–85 × 3–5.5 µm, cystidioles absent; basidia narrowly clavate, with four sterigmata and a simple septum, 18–26.5 × 3.5–5.5 µm; basidioles dominant, in shape similar to basidia, but slightly smaller.

Spores. —Basidiospores ellipsoid, hyaline, thin-walled, smooth, IKI–, CB –, 4–5.5(–6) × (2.5)3–3.5 µm, L = 4.45 µm, W = 3.19 µm, Q =1.31–1.48 (n = 240/4).

Associated wood-rot: White.

Additional specimens examined.— CHINA, Yunnan Province, Puer, Jingdong County, Wuliangshan National Nature Reserve, on angiosperm fallen branch, 3 October 2017, CLZhao 3705/ SWFC 3705, 3721/ SWFC 3721, 3747/ SWFC 3747 (paratypes, SWFC!).

Figures

FIGURE 3. Basidiomata of Phlebiopsis lacerata (holotype). Scale bars: a, b– 2 cm.

FIGURE 4. A section of hymenium of Phlebiopsis lacerata (drawn from the holotype). Bars: a–10 μm.

FIGURE 5. Microscopic structures of Phlebiopsis lacerata (drawn from the holotype). a. basidiospores. b. basidia. c. basidioles. d. cystidia. Bars: a–5 μm; b, c–10 μm.