Chaetosphaeriales » Leptosporellaceae » Leptosporella

Leptosporella cocois

Leptosporella cocois

Konta, Boonmee & K.D. Hyde (2017)

 

Classification:Ascomycota-Pezizomycotina-Sordariomycetes-Sordariomycetidae-Chaetosphaeriales-Leptosporellaceae-Leptosporella

 

Host species: Cocos nucifera (Konta et al. 2017)

 

Holotype: MFLU 15–2349 (Konta et al. 2017)

 

Known distribution: Prachaupkhirikan, Thailand

 

IF Number: IF553958      Mycobank Number: 553958    FOF Number: FoF03842

 

Description

Saprobic on rachis of Cocos nucifera L. Sexual morph: Ascomata 705–977 μm diameter × 209–298 μm high (x̅  = 800 × 250 μm, n = 10), solitary or aggregated, superficial, comprising black, dome shaped, raised blistering areas, subglobose, flattened at the base, ostiole central. Peridium 76–125 μm diameter (x̅  = 98 μm, n = 10), outer cells merging with the host epidermal cells, composed of dark brown to black cells of textura angularis. Hamathecium comprising numerous, 3–6 µm diameter (x̅  = 4.5 μm, n = 10), hypha-like, septate paraphyses, longer than asci. Asci 145–242 × 8–13 μm (x̅  = 187 × 10 μm, n = 20), 8-spored, unitunicate, cylindrical, long-pedicellate, with a J-, wedge-shaped, subapical ring. Ascospores 99–156 × 2.5–4 μm (x̅  = 126 × 3 μm, n = 20), fasciculate, becoming spiral when mature, filiform, straight or curved, hyaline, aseptate, rounded at the apex, pointed at the base, smooth-walled, 1–4-septate when geminated. Asexual morph: Undetermined.

 

Culture conditions: Ascospores germinating on MEA within 2 days. Colonies on MEA growing, reaching 7–8.5 cm diameter after 2 months at 25°C, white at the edge, brown in the center, outwardly with strong light brown radiations. After 30 days of incubation, colonies smooth, flat, margin entire, hypha septate, branched and smooth-walled.

 

 

Leptosporella cocois (MFLU 15–2349, holotype). (A) Appearance of ascomata on host substrate. (B) Close up of ascomata. (C–D) Sections of ascomata. (E) Paraphyses. (F–H) Asci. (I–K) Ascospores. (L) Germinated ascospore. Scale bars: A = 1,000 μm, B = 500 μm, C–D = 200 μm, E = 10 μm, F–K = 50 μm, L = 20 μm..

 

Reference

Konta, S., Hongsanan, S., Eungwanichayapant, P. D., Liu, J. K., Jeewon, R., Hyde, K. D., ... & Boonmee, S. (2017). Leptosporella (Leptosporellaceae fam. nov.) and Linocarpon and Neolinocarpon (Linocarpaceae fam. nov.) are accommodated in Chaetosphaeriales. Mycosphere, 8(10), 1943-1974.

 

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