Hypomyces pseudolactifluorum 2020

Hypomyces pseudolactifluorum F. M. Yu, Q. Zhao & K. D. Hyde 2020

Index Fungorum number: IF557817

Holotype: scientificName: Hypomyces pseudolactifluorum; country: China; stateProvince: Yunnan; locality: Baoshan, Longyang, Baihualing; verbatimElevation: 2094m; locationRemarks: label transliteration: "Yunnan, Baoshan, Longyang, Baihualing, on Russula sp., 20 July 2018, Jian-Wei Liu; [云南保山百花岭 2094 m, 2018.07.20, 刘建伟]; verbatimCoordinates: 25°17.931’N, 98°47.0718’E; decimalLatitude: 25.2989; decimalLongitude: 98.7845; georeferenceProtocol: label; lifeStage: Telemorph; catalogNumber: MFLU 20-0265; recordedBy: Jian-Wei Liu; identifiedBy: Feng-Ming Yu; dateIdentified: 2019

Morphological description

Sexual morph. Subiculum light yellow (4A4–5) when fresh and pale orange, light orange to brownish-orange (5A3–4, 5C4, 6C6) after being dried, usually covering the pileus, stipe and deformed gills of the host mushroom. Perithecia aggregated, semiimmersed to immersed in subiculum, except for their erumpent papilla, yellowish-brown to dark brown (5E6, 6E6, 6F6–8), pyriform to subglobose, 262–484 × 136–284 μm; perithecial wall 12–25 μm thick, single-layer, cells 9–22 × 4–8 μm. Papilla prominent, 129–177 μm high, at base 135–284 μm wide. Asci 8-spored, cylindrical, 147–222 × 4– 9 μm; apex thickened, 4.9–6.0 wide and 2.5-3.0 μm high. Ascospores uniseriate and with ends overlapping, fusiform, 30–38 × 6–8 μm, single-septate, septum median and with dense verrucae and prominently apiculate, apiculi 4.5–8.0 μm long, straight or curved. Asexual morph: unknown.

Habitat: On the fruiting bodies of Russula sp.

Distribution: PR CHINA (Yunnan).

GenBank Accession: ITS: MT260402; LSU: MT260399; TEF1-α: MT259361; RPB2: MT259359

Notes: Only sexual morph had been discovered on the hosts (Russula sp.) of the new species.

Reference: Yu F, Jayawardena RS, Liu J et al.(2020) Hypomyces pseudolactifluorumsp. nov. (Hypocreales: Hypocreaceae) on Russula sp. from Yunnan, PR China. Biodiversity Data Journal 8: e53490. https://doi.org/10.3897/BDJ.8.e53490 

Hypomyces pseudolactifluorum sp. nov.. a: The host mushroom (Russula sp.); b-e: Perithecia embedded in subiculum effused over the substratum; d-e: Median sections of an ascoma; f: Section of peridium; g-l: Asci with ascospores; m-t: Ascospores. Scale bars: a = 5 cm; b = 1 mm; c = 200 μm; d, e = 100 μm; f, g= 50 μm; h - l = 20 μm; m - t = 10 μm.