Sidera minutipora (Rodway & Cleland) Y.C. Dai, F. Wu, G.M. Gates & Rui Du, 2020

Du, Rui, Wu, Fang, Gate, Genevieve M., Dai, Yu-Cheng & Tian, Xue-Mei, 2020, Taxonomy and phylogeny of Sidera (Hymenochaetales, Basidiomycota): four new species and keys to species of the genus, MycoKeys 68, pp. 115-135 : 115

Sidera minutipora (Rodway & Cleland) Y.C. Dai, F. Wu, G.M. Gates & Rui Du comb. nov. Figures 2 , 3

Poria minutipora Rodway & Cleland, Pap. & Proc. Roy. Soc. Tasmania 1929: 17 (1930). Basionym.

Type.

Australia. New South Wales, Malanganee, 25 miles west of Casino, August 1917, MBT 35118.

Description.

Basidiomata: Annual, resupinate, soft when fresh, soft corky to fragile when dry, up to 6.5 cm long, 3 cm wide, and approximately 1 mm thick at center; pore surface cream to buff when fresh, become buff to olivaceous buff when dry; sterile margin distinct, fimbriate, thinning out; pores round, 5-7 per mm; dissepiments thin, lacerate; subiculum very thin to almost absent; tubes darker than the poroid surface, up to 1 mm long.

Hyphal structure: Hyphal system dimitic, generative hyphae bearing clamp connections; all hyphae IKI-, CB-, skeletal hyphae swolling in KOH.

Subiculum : Generative hyphae hyaline, thin-walled, occasionally branched, 1-2 µm in diam; skeletal hyphae dominant, unbranched, interwoven, 1.5-2.5 μm diam; rosette-like crystals occasionally present, 1.5-7.0 µm in diam, irregular crystals frequently present.

Tubes: Generative hyphae hyaline, thin-walled, occasionally branched, 1-2 µm in diam, some with swollen tips; skeletal hyphae with a narrow lumen to subsolid, unbranched, interwoven, 1.8-3.0 µm diam; skeletal hyphae and generative hyphae co-dominating at dissepiment edges; rosette-like and irregular rhomboidal crystals occasionally present; cystidioles present, fusoid, hyaline, thin-walled, basally swollen, with a long or hyphoid neck, 7-19 × 2.4-4 μm; basidia barrel-shaped, hyaline, bearing four sterigmata and a basal clamp connection, 6.7-9 × 3.5-4.5 μm; basidioles in shape similar to basidia, but slightly shorter.

Basidiospores: Allantoid, hyaline, thin-walled, smooth, occasionally with one or two guttules, IKI-, CB-, 3.7-4.3(-4.5) × 1-1.3 μm, L = 4.01 μm, W = 1.08 μm, Q = 3.71 (n = 30/1).

Specimen examined.

Australia. Tasmania, Arve River Streamside Reserve, on rotten stump of Eucalyptus , 15 May 2018, B.K. Cui 16720 (BJFC 030019, Duplication in MEL); Warra LTER, 43°05'4"S, 146°38'5"E, 16.Jan 2007 Gates FF257 (MEL).

Figures

Figure 2. A basidioma of Sidera minutipora (Cui 16720). Scale bar: 1 cm. Photo by Bao-Kai Cui.

Figure 3. Microscopic structures of Sidera minutipora (Cui 16720) a basidiospores b basidia, basidioles c cystidioles d hyphae from subiculum e hyphae from trama f hyphae at dissepiment edge. Drawings by Rui Du.