Name: Phellinopsis asetosa L.W. Zhou
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Nomenclature:

Rank: Species

Status: Accepted

Name: Phellinopsis asetosa

ICN Identifier: missing

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Author: L.W. Zhou

Citation: mycoscience xxx (2014) 3-4

Classification:

Genus: Phellinopsis

Lifeform:
Notes on Taxonomy: [Edit]

Basidiocarps seasonal, resupinate, inseparable. Pore sur- face more or less glancing; pores circular, 5e6 per mm. Hyphal system dimitic. Setae absent. Cystidia and cystidioles absent. Basidiospores oblong-ellipsoid to ellipsoid, hyaline, becoming pale yellowish with age, thick-walled, smooth, IKI␣, CB␣ or
slightly CBþ, 6.1e7.2
4.5e5.1 mm.Type: China, Yunnan Province, Jingdong County, Ailaoshan Nature Reserve, on fallen angiosperm trunk, 15 Oct 2013, Dai 13553 (Holotype, BJFC 015015; Isotype, IFP 019117).
rRNA gene sequences ex holotype: KJ425523 (nLSU); KJ425524 (ITS).
Etymology: asetosa (Lat.): referring to the absence of setae.
Basidiocarps: seasonal, resupinate, inseparable, woody, without odor or taste when fresh, and weight unchanged whendry,uptoca.12cmlong,7cmwide,1mmthickat center. Pore surface reddish brown when fresh, dark brown when dry, more or less glancing; sterile margin distinct, yellowish brown, tomentose, up to 1.5 mm wide; pores cir- cular, 5e6 per mm; dissepiments thin, entire. Context orange- brown, woody, up to 0.5 mm thick. Tubes buff to cinnamon- buff, woody, up to 0.5 mm thick.
Hyphal structure: hyphal system dimitic; tissue darkening but otherwise unchanged in KOH. Context: generative hyphae scarce, pale yellowish, slightly thick-walled, unbranched, simple septate, 1.5e2 mm in diam, CB␣; skeletal hyphae dominating, golden brown, thick-walled with a wide to nar- row lumen, unbranched, aseptate, more or less flexuous, interwoven, 2e3 mm in diam. Tubes: generative hyphae infrequent, hyaline, thin- to fairly thick-walled, unbranched, simple septate, 1.8e2 mm in diam, CB␣; skeletal hyphae dominating, brown, thick-walled with a wide lumen, un- branched, aseptate, parallel along the tubes, 2e3 mm diam. Hymenial setae absent; cystidia and cystidioles absent; basi- dia clavate, with four sterigmata and a simple septum at the base, 15e19 4e7 mm; basidioles similar in shape to basidia, but slightly smaller. Basidiospores oblong-ellipsoid to
ellipsoid, hyaline, becoming pale yellowish with age, thick- walled, smooth, IKI␣, CB␣ or slightly CBþ, (6e) 6.1e7.2(e7.7) (4.3e)4.5e5.1(e5.3) mm, L 1⁄4 6.74 mm, W1⁄44.8mm,Q1⁄41.4(n1⁄430/1).
Remarks: Phellinopsis asetosa has thick-walled, hyaline ba- sidiospores that become pale yellowish with age. This char- acter fits the generic concept of Phellinopsis defined by Dai (2010). However, Phellinopsis asetosa lacks hymenial setae, which distinguishes it from other previously known species of Phellinopsis, which bear hymenial setae (Qin and Zhou 2013; Zhou and Qin 2013).

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