Sidera parallela 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 parallela Y.C. Dai, F. Wu, G.M. Gates & Rui Du sp. nov. Figures 6 , 7

Type material.

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

Etymology.

Parallela (Lat.), refers to the species having tubes with parallel tramal hyphae.

Description.

Basidiomata: 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 barrel-shaped, 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).

Additional specimen examined (paratype).

China. Yunnan Province, Lanping County, Luogujing Scenic Spot, on fallen angiosperm trunk, 19 Sep 2011, B.K. Cui 10361 (BJFC 011256).

Figures

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

Figure 7. Microscopic structures of Sidera parallela (holotype, Cui 10346) a basidiospores b basidia, basidioles c cystidioles d hyphae from subiculum e hyphae from trama f hyphae at dissepiment edge. Drawings by Rui Du.