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

Figs 5 , 6

Diagnosis.

Trametopsis tasmanica is distinguished from T. abieticola by resupinate basidiomata, smaller pores (2-4 per mm) and basidiospores (5.2-6.3 × 1.8-2.2 μm), and by growing on Eucalyptus sp.

Holotype.

Australia. Tasmania, Hobart, Mount Wellington, on rotten wood of Eucalyptus sp., 13 May 2018, Cui 16606 (holotype BJFC 029905).

Etymology.

Tasmanica (Lat.): referring to the species collected from Tasmania in Australia.

Fruiting body.

Basidiomata annual, resupinate, not easily separated from the substrate, without odour or taste when fresh, becoming corky to fragile and light in weight upon drying; up to 5.5 cm long, 2 cm wide, and 7 mm thick at centre. Pore surface cream to pinkish-buff when fresh, becoming honey-yellow to snuff brown upon drying; pores round to angular, 2-4 per mm; dissepiments slightly thick, entire to lacerate. Context very thin, corky, cream to buff, up to 2 mm thick. Tubes concolorous with pore surface, corky, up to 4 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 with a wide lumen, occasionally branched, loosely interwoven, 2.7-4 μm in diam.

Tubes.

Generative hyphae frequent, hyaline, thin-walled, occasionally branched, 2-3 μm in diam.; skeletal hyphae dominant, hyaline, thick-walled with a wide to narrow lumen, occasionally branched, more or less straight, interwoven, 2-3.7 μm in diam. Cystidia and cystidioles absent. Basidia clavate, bearing four sterigmata and a basal clamp connection, 16-19.5 × 3.7-5 µm; basidioles dominant, similar to basidia but smaller.

Spores.

Basidiospores cylindrical, hyaline, thin-walled, smooth, IKI-, CB-, (5-)5.2-6.3 × (1.7-)1.8-2.2(-2.4) μm, L = 5.84 μm, W = 2.02 μm, Q = 2.66-3.13 (n = 60/2).

Type of rot.

White rot.

Additional specimen (paratype) examined.

Australia. Tasmania, Hobart, Mount Wellington, on rotten branch of Eucalyptus sp., 13 May 2018, Cui 16607 (BJFC 029906).

Figures

Figure 5. Trametopsis tasmanica (Holotype, Cui 16606 and paratype, Cui 16607). Scale bar: 1 cm.

Figure 6. Microscopic structures of Trametopsis tasmanica (Holotype, Cui 16606) a Basidiospores b Basidia c Basidioles d Hyphae from trama e Hyphae from context.