Megasporoporiella hubeiensis
MycoBank number: MB 558815; Index Fungorum number: IF 558815; Facesoffungi number: FoF 10468;
Dichomitus hubeiensis Hai J. Li & B.K. Cui, Nordic Journal Botany 31: 118 (2013).
Description
Basidiocarps biennial, resupinate, cushion-shaped, corky, without odor or taste when fresh, becoming hard corky upon drying, up to 2.4 cm long, 12 cm wide, and 2.4 mm thick at center; sterile margin thinning out, very narrow to almost lacking. Pore surface white to cream when fresh, vinaceous buff to fulvous when dry; pores round to angular, 1–2 per mm; dissepiments thick, entire; subiculum pale buff, corky, up to 0.6 mm thick; tubes concolorous with the pore surface, corky, up to 1.8 mm long. Hyphal system dimitic; generative hyphae bearing clamp connections; skeletal hyphae IKI–, CB+; tissues unchanged in KOH. (not dissolved). Subicular generative hyphae hyaline, thin-walled, occasionally branched, 2.5–2.8 µm in diam; skeletal hyphae dominant, thick-walled with a narrow to medium lumen, frequently branched, mostly flexuous, interwoven, 2.8–3 µm in diam. Tramal generative hyphae hyaline, thin-walled, occasionally branched, 1.8–2.5 µm in diam; skeletal hyphae dominant, thick-walled with a narrow lumen, frequently branched, mostly flexuous, interwoven, 2.5–3 µm in diam. Dendrohyphidia present. Hyphal pegs absent. Cystidia absent; cystidioles present, subulate or ventricose, thin-walled, smooth, 18.2–37.2 × 6.3–10.5 µm. Basidia clavate, with four sterigmata and a basal clamp connection, 26.8–34.2 × 7.8–11.2 µm; basidioles in shape similar to basidia, but smaller. Small tetrahedric or polyhedric crystals frequently present among hymenium. Basidiospores cylindrical, hyaline, thin-walled, smooth, usually with one big guttule, IKI–, CB–, (11–)12–14.3(–14.8) × (4–)4.5–5.7(–6.5) µm, L = 13.26 µm, W = 5.12 µm, Q = 2.37–2.55 (n = 60/2).
Material examined: China, Hebei, Zhuolu County, Xiaowutai Natural Reserve, Shanjiankou, on dead branch of Salix, 10 September 2017, Y.C. Dai 18102 (BJFC025632), Y.C. Dai 18103 (BJFC025633); Hubei, Fang County, Shennongjia Natural Reserve, on fallen angiosperm branch, 22 September 2004, Wei 2045 (BJFC012314, holotype).
Distribution: China, Hebei Prov., Hubei Prov, Fang County
Sequence data: Wei2045 (Holotype) – ITS: JQ780387 (ITS5/ITS4); LSU: JQ780421 (LROR/LR7); MTSSU: KX838396 (MS1/MS2); Dai18102- ITS: MW694890 (ITS5/ITS4); LSU: MW694933 (LROR/LR7); MTSSU: MW694918 (MS1/MS2); EF1a: MZ618636 (983F/1567R); Dai18103- ITS: MW694891 (ITS5/ITS4); LSU: MW694934 (LROR/LR7); MTSSU: MW694919 (MS1/MS2);
Notes: Megasporoporiella hubeiensis was originally described as Dichomitus hubeiensis Hai J. Li & B.K. Cui from subtropical China (Li & Cui 2013a). But our phylogenies show the species nested in Megasporoporiella clade with a robust support (100 % MP, 100 % ML, 1.00 BPP). So, the above combination is proposed.
![Picture1](https://www.facesoffungi.org/wp-content/uploads/2022/05/Picture1-26-1024x685.jpg)
Fig. 1. Megasporoporiella hubeiensis (neotype). Basidiocarps of Megasporoporiella hubeiensis (the holotype, Dai 18102).
![Picture2](https://www.facesoffungi.org/wp-content/uploads/2022/05/Picture2-28-744x1024.jpg)
Fig. 2. Megasporoporiella hubeiensis (neotype). Microscopic structures of Megasporoporiella hubeiensis (drawn from Dai 18103). (A) Basidiospores; (B) Basidia; (C) Basidioles; (D) Cystidioles; (E). Hyphae from subiculum; (F) Hyphae from tube.