Hypocreales » Cordycipitaceae » Cordyceps

Cordyceps pruinosa

Cordyceps pruinosa Petch, Trans. Br. mycol. Soc. 10(1-2): 38 (1924)

Index Fungorum number: IF165068, Facesoffungi number: FoF07468

Parasitic on limacodid pupa which resemble a plant seed. Sexual morph: Undetermined. Asexual morph: Hyphomycetous. Stroma emerging from host, single, erect, cylindrical, apically branched, red, pale yellow at the base, fleshy, with white straight hyphae and interlaced vegetative hyphae mass occurring on the surface of upper stroma. In vitro, Synnemata orange, erect, compacted below, apically branched, becoming finger-like. Mycelium 0.6–1.20 (x̄ = 1, n = 20) μm, aseptate, hyaline, smooth-walled. Conidiophores macronematous, prostrate, branched, bearing solitary or 2–3 whorls of phialides. Conidiogenous cells phialidic. Phialides 11–30 × 1.2–1.6 (x̄ = 16 × 1.3, n = 20) μm, aseptate, monophialidic, gradually tapering towards the apex, hyaline, straight. Conidia 1.8–4.8 × 0.9–2.7 (x̄ = 3 × 1.5, n = 30) μm, globose, oval, cylindrical, aseptate, smooth-walled, hyaline, aggregating in imbricated slimy chains at the tip of phialides. Asexual morph: Undetermined. (Adopted from Hyde et al. 2020)

Culture characters: slow-growing on PDA, reaching 4 cm in diameter after incubating at room temperature for 26 days, yellow from upper and reverse view, floccose, dense, circular, feathery margin, with several erect, orange synnemata developing at central regions, without diffused pigment. The sporulation occurs on upper part of synnemata. (Adopted from Hyde et al. 2020)

Known hosts and distribution (based on molecular data): on cocoon of a Limacodidae insect, Iragoides fasciata (Lepidoptera) (China, Korea, Japan) (Hyde et al. 2020).

Important value: folk medicine.

Sequence data: KUMCC 18–0340 (ITS = MT012347, LSU = MT012354, SSU = MT012361, TEF = MT025053) (Hyde et al. 2020)

 

 

Cordyceps pruinosa (Material examined: China, Yunnan Province, Kunming City, Western hill Park. On Limacodid pupa, 27 July 2018, Deping Wei (HKAS 102537)). a Stroma emerging from host. b, f White hypha produced on stroma. c, d Upper and reverse view of cultures on PDA after 34 days incubation. e Vertical section of stroma. g interlaced hypha occurring on upper region of stroma. h, j Conidiophore. k, l Phialides. i, m–o Conidia adhering in imbricated chains. Scale Bars: e = 150 μm, f = 50 μm, g, h = 30 μm, i–l = 20 μm, m–o = 10 μm. (e–g, j–o stained with cotton blue; e–g observed from host and h–o are from culture). (Adopted from Hyde et al. 2020)

 

Phylogram generated from maximum likelihood analysis based on combined LSU, SSU, ITS and tef1 sequence data. Bootstrap values for maximum likelihood equal to or greater than 70 and Bayesian posterior probabilities equal or greater than 0.90 are placed above or below the branches. The newly generated sequences are indicated in red bold. (Adopted from Hyde et al. 2020)

References:

Hyde KD, de Silva N, Jeewon R, Bhat DJ, Phookamsak R, Doilom M et al. (2020) – AJOM new records and collections of fungi: 1-100. Asian Journal of Mycology 3: 22–294. http://dx.doi.org/ 10.5943/ajom/3/1/3

 

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