Sidera parallela 2020

Sidera parallela Y.C. Dai, F. Wu, G.M. Gates & Rui Du, sp. nov. 2020 

MycoBank No: 829166

Holotype: China. Yunnan Province, Lanping County, Luogujing Scenic Spot, on rotten angiosperm trunk, 19 Sep 2011, B.K. Cui 10346 (BJFC 011241). 

Morphological description: 

Annual, resupinate, soft corky when fresh, soft corky when dry, up to 11 cm long, 4 cm wide, and approximately 1.5 mm thick at center; pore surface white when fresh, becoming cream to buff yellow upon drying; sterile margin distinct, fimbriate, thinning out; pores round, 6–8 per mm; dissepiments thick, entire; subiculum very thin to almost absent; tubes concolorous with pore surface, up to 1.5 mm long.

Hyphal structure: Hyphal system dimitic, generative hyphae bearing clamp connections; skeletal hyphae dominant, unbranched, interwoven or parallel, 2–3 µm diam; all hyphae IKI–, CB–, unchanged in KOH. Subiculum: Generative hyphae hyaline, thin-walled, rarely branched, 1–2 µm in diam; skeletal hyphae dominating, more or less straight, unbranched, interwoven, 2–3 μm diam; rosette-like crystals frequently present, 2–8.5 µm in diam, some irregular rhomboidal crystals present. Tubes: Generative hyphae hyaline, thin-walled, rarely branched, 1–2 µm in diam, dominating at dissepiment edges; skeletal hyphae with a narrow lumen to subsolid, unbranched, parallel along the tubes, 2–3 µm diam; rosette-like and irregular rhomboidal crystals abundant; cystidia absent; cystidioles present, fusoid, hyaline, thin-walled, basally swollen, with a sharp or often hyphoid neck, 8.0–17 × 2.3–4 μm; basidia barrelshaped, hyaline, bearing four sterigmata and a basal clamp connection, 7–9 × 4–5 μm; basidioles in shape similar to basidia, but slightly shorter. Basidiospores: Lunate, hyaline, thin-walled, smooth, occasionally with one or two guttules, IKI–, CB–, (2.7–)2.8–3.3 × (0.8–)0.9–1.2 μm, L = 3 μm, W = 1.07 μm, Q = 2.72–2.87 (n = 60/2)

Habitat: on rotten angiosperm trunk.

Distribution China.

GenBank Accession: ITSMK246145\MK346144

Notes: 

Reference: Rui Du1*, Fang Wu1*, Genevieve M. Gate2 et al.

Figure 6. A basidioma of Sidera parallela (holotype, Cui 10346). Scale bar: 1 cm. Photo by Bao-Kai Cui.