Trametopsis abieticola B.K. Cui & Shun Liu, 2022

Liu, Shun, Sun, Yi-Fei, Wang, Yan, Xu, Tai-Min, Song, Chang-Ge, Chen, Yuan-Yuan & Cui, Bao-Kai, 2022, Taxonomy and molecular phylogeny of Trametopsis (Polyporales, Basidiomycota) with descriptions of two new species, MycoKeys 90, pp. 31-51 : 31

Trametopsis abieticola B.K. Cui & Shun Liu sp. nov.

Figs 3 , 4

Diagnosis.

Trametopsis abieticola is distinguished from T. tasmanica by larger pores (0.5-1 per mm) and basidiospores (5.8-7.2 × 1.9-2.6 μm), and by being distributed in the high altitude of mountains and growing on Abies sp.

Holotype.

China. Xizang Autonomous Region (Tibet), Mangkang County, Mangkang Mountain, on fallen trunk of Abies sp., 8 September 2020, Cui 18383 (holotype BJFC 035242).

Etymology.

Abieticola (Lat.): referring to the species grows on Abies sp.

Fruiting body.

Basidiomata annual, pileate, solitary or imbricate, soft corky to corky, without odour or taste when fresh, becoming corky and light in weight upon drying. Pilei applanate to flabelliform, projecting up to 9.5 cm long, 5.5 cm wide, and 2 cm thick at base. Pileal surface buff to buff-yellow when fresh, becoming pinkish buff to clay-buff when dry, strigose or glabrous; margin white to cream when fresh, becoming cream to buff-yellow when dry, obtuse to acute. Pore surface cream to buff when fresh, becoming pinkish buff to greyish brown upon drying; pores round to angular, 0.5-1 per mm; dissepiments slightly thick, entire to lacerate. Context corky, cream to buff yellow, up to 8 mm thick. Tubes concolorous with pore surface, corky, up to 7 mm long.

Hyphal structure.

Hyphal system monomitic in context, dimitic in trama; generative hyphae with clamp connections; skeletal hyphae IKI-, CB-; tissues unchanged in KOH.

Context.

Generative hyphae hyaline, thin- to slightly thick-walled, occasionally branched, loosely interwoven, 2.8-4.2 μm in diam.

Tubes.

Generative hyphae frequent, hyaline, thin- to slightly thick-walled, occasionally branched, 1.8-3.5 μm in diam.; skeletal hyphae dominant, hyaline, thick-walled with a wide to narrow lumen, occasionally branched, more or less straight, interwoven, 2-4.5 μm in diam. Cystidia and cystidioles absent. Basidia clavate, bearing four sterigmata and a basal clamp connection, 17.8-22.5 × 4.3-5.5 µm; basidioles dominant, similar to basidia but smaller.

Spores.

Basidiospores cylindrical, hyaline, thin-walled, smooth, IKI-, CB-, (5.7-)5.8-7.2 × (1.8-)1.9-2.6(-2.8) μm, L = 6.57 μm, W = 2.22 μm, Q = 2.75-3.26 (n = 60/2).

Type of rot.

White rot.

Additional specimen (paratype) examined.

China. Sichuan Province, Yajiang County, Kangbahanzi Village, on fallen trunk of Abies sp., 7 September 2020, Cui 18363 (BJFC 035222).

Figures

Figure 3. Basidiomata of Trametopsis abieticola (Holotype, Cui 18383). Scale bar: 3 cm.

Figure 4. Microscopic structures of Trametopsis abieticola (Holotype, Cui 18383) a basidiospores b basidia c basidioles d hyphae from trama e hyphae from context.