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.