Hapalopilus tabuliformis Y. C. Dai, Xin Zhang, Ghobad-Nejhad & Yuan Yuan 2024, sp. nov.
Creators: name: Zhang, Xin
name: Zhou, Hong-Min
name: Ghobad-Nejhad, Masoomeh
name: Liu, Hong-Gao
name: Vlasák, Josef
name: Dai, Yu-Cheng
name: Yuan, Yuan
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Fungi
Basidiomycota
Agaricomycetes
Polyporales
Phanerochaetaceae
Hapalopilus
Hapalopilus tabuliformis

description: Hapalopilus tabuliformis Y. C. Dai, Xin Zhang, Ghobad-Nejhad & Yuan Yuan sp. nov.
Figs 4, 5
Holotype.
China. Inner Mongolia Autonomous Region, Alxa County, Beisi Forest Park, on fallen branch of Pinus tabuliformis, 18 September 2022, Dai 24540 (BJFC 039782).
Etymology.
Tabuliformis (Lat.): refers to the species growing on Pinus tabuliformis.
Diagnosis.
Hapalopilus tabuliformis is characterized by resupinate to effused-reflexed basidiomata having a pale pink to buff-yellow pileal surface and purple coloration in KOH solution, small pores 3–5 per mm, the absence of cystidioles, long and narrow basidia measuring 18–31 × 3.2–5.8 μm, broadly ellipsoid basidiospores measuring 3.2–4 × 2.6–3.2 μm, and growing on Pinus tabuliformis in western China.
Fruitbody.
Basidiomata annual, resupinate to effused-reflexed, adnate, soft corky and without odor or taste when fresh, becoming brittle to hard corky upon drying. Pilei projecting up to 0.9 cm, 1.2 cm wide and 3 mm thick at base. Pileal surface pale pink to buff-yellow when fresh, becoming honey-yellow when dry. Pore surface light vinaceous gray to grayish violet when fresh, becoming buff to grayish brown when dry; margin cream to pale ochraceous, fimbriate and thinning out when resupinate, up to 1 mm wide; pores angular to irregular, 3–5 per mm; dissepiments thin, entire to lacerate. Context honey and corky when dry, up to 2 mm thick, becoming purple in KOH solution. Tube layer concolorous with pore surface, corky, up to 1 mm deep.
Hyphal structure.
Hyphal system monomitic; generative hyphae bearing clamp connections, richly encrusted with fine yellowish crystals (dissolved in KOH solution), IKI –, CB –; tissue becoming purple in KOH solution.
Context.
Generative hyphae hyaline, slightly thick- to thick-walled, occasionally branched, interwoven, 2–4.3 µm in diam.
Tubes.
Generative hyphae hyaline, thin- to slightly thick-walled, frequently branched, interwoven, flexuous, 3–5.9 µm in diam. Cystidia and cystidioles absent. Basidia clavate to pyriform, bearing four sterigmata and a basal clamp connection, 18–31 × 3.2–5.8 μm; basidioles similar in shape to basidia, but smaller.
Spores.
Basidiospores broadly ellipsoid, hyaline, thin-walled, smooth, usually with a guttule, IKI –, CB –, (3 –) 3.2–4 (– 4.2) × (2.5 –) 2.6–3.2 (– 3.4) μm, L = 3.68 μm, W = 2.76 μm, Q = 1.25 (n = 60 / 2).
Ecology and distribution.
Growing on fallen branches of Pinus tabuliformis. Known from the type location only.
Type of rot.
White rot.
Additional specimen examined.
China. Inner Mongolia Autonomous Region, Alxa County, Beisi Forest Park, on fallen branch of Pinus tabuliformis, 18 September 2022, Dai 24535 (BJFC 039777).
description: Published as part of Zhang, Xin, Zhou, Hong-Min, Ghobad-Nejhad, Masoomeh, Liu, Hong-Gao, Vlasák, Josef, Dai, Yu-Cheng & Yuan, Yuan, 2024, Molecular and morphological data reveal two new polypores (Polyporales, Basidiomycota) with reddish brown to orange basidiomata from China, pp. 75-94 in MycoKeys 107 on pages 75-94, DOI: 10.3897/mycokeys.107.126176