Hymenochaetales » Nigrofomitaceae  » Eucalyptoporia

Eucalyptoporia tasmanica

Eucalyptoporia tasmanica B.K. Cui & Shun Liu 2023, in Liu et al., Mycosphere 14(1): 1634 (2023).

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

Diagnosis: Basidiomata annual, resupinate to effused-reflexed, not easily separated from substrate, corky, without odor or taste when fresh, corky to fragile upon drying, up to 5 cm long, 10 cm wide, 5 mm thick at center. Pore surface white to pinkish buff when fresh, becoming buff yellow to clay-buff upon drying; pores angular to round, 4–6 per mm; dissepiments slightly thick, entire to lacerate. Subiculum buff, corky, thin, up to 2 mm thick. Tubes concolorous with pore surface, corky, up to 3 mm long.

Hyphal system dimitic; generative hyphae with clamp connections; skeletal hyphae IKI–, CB–; tissues unchanged in KOH.

Generative hyphae frequent, hyaline, thin- to slightly thick-walled, frequently branched, 3.3–5.8 μm in diam; skeletal hyphae dominant, hyaline, thick-walled with a narrow lumen to subsolid, rarely branched, interwoven, 3.2–6.3 μm in diam.

Generative hyphae abundant in trama, hyaline, thin-walled, frequently branched, 1.9–3.2 μm in diam; skeletal hyphae frequent, hyaline, thick-walled with a wide to narrow lumen, 2.8–3.4 μm in diam. Cystidia absent, but fusoid cystidioles occasionally present, hyaline, thin-walled, 13–26 × 3.2–4.8 μm. Basidia clavate, with four sterigmata and a basal clamp connection, 17.8–30 × 4.2–6.3 μm; basidioles dominant, in shape similar to basidia, but slightly smaller.

Basidiospores cylindrical to oblong-ellipsoid, hyaline, thin-walled, smooth, IKI–, CB–, (3.8–)4–5(–5.2) × (1.9–)2–2.8(–3) μm, L = 4.58 μm, W = 2.35 μm, Q = 1.66–2.13 (n = 50/1).

Index Fungorum Number: IF900937

 

Figure 1. Maximum likelihood tree illustrating the phylogeny of the brown‑rot fungi within the Polyporales based on the combined sequence dataset of ITS+nLSU+mtSSU+nuSSU+RPB1+ RPB2+TEF1. Branches are labeled with parsimony bootstrap proportions higher than 50%, maximum likelihood bootstrap higher than 50% and Bayesian posterior probabilities more than 0.95 respectively. Bold names = New species.

 

 

 

 

Figure 2. Microscopic structures of Eucalyptoporia tasmanica (drawn from the holotype). a Basidiospores. b Basidia and basidioles. c Cystidioles. d Hyphae from trama. e Hyphae from context. Scale bars: a = 5 μm, b–e = 10 μm.

 

Reference:

Liu, S., Shen, L. L., Xu, T. M., Song, C. G., Gao, N., Wu, D. M., Sun, Y. F., Cui, B. K. (2023). Global diversity, molecular phylogeny and divergence times of the brown‑rot fungi within the Polyporales. Mycosphere 14(1), 1564–1664.

 

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