Linocarpon cocois

Linocarpon cocois

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

Classification:Ascomycota-Pezizomycotina-Sordariomycetes-Sordariomycetidae-Chaetosphaeriales-Linocarpaceae-Linocarpon

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

Holotype: MFLU 15–2345 (Konta et al. 2017)

Known distribution: Prachaupkhirikan, Thailand

IF Number: IF553961     Mycobank Number: 553961       FOF Number: FoF03845

Description

Saprobic on rachis of Cocos nucifera L. Sexual morph: Ascomata 73–184 μm high × 400–980 μm diameter (x̅  = 124 × 655 μm, n = 10, up to 1,000 μm), solitary or aggregated, superficial, comprising shiny, black, dome shaped, raised blistering areas, subglobose, flattened at the base, central ostiole. Peridium 60–92 μm diameter (x̅  = 71 μm, n = 10), outer cells merging with the host epidermal cells, composed of dark brown to black, cells of textura angularis. Hamathecium comprising numerous, 0.5–1 µm diameter (x̅  = 0.7 μm, n = 10), hyaline, septate, hypha-like paraphyses, longer than asci. Asci 100–153 μm × 8–15 μm (x̅ =120 × 10 μm, n = 20), 8-spored, unitunicate, cylindrical, long-pedicellate, with a J-, wedge-shaped, subapical ring. Ascospores 69–90 × 3–5 μm (x̅  = 76 × 4 μm, n = 20), parallel when immature, becoming spiral at maturity, filiform-fusiform, straight or curved, hyaline, aseptate when mature, becoming multi-septate when germinating, without refringent septum-like bands, ends rounded, the base wider than apex, smooth-walled, with a mucilaginous appendage at the apex, producing germ tube from each cell. Asexual morph: Undetermined.

Culture conditions: Ascospores germinating on MEA within 24 hours. Colonies on MEA reaching 7–8.5 cm diameter after 2 months at 25°C, white at the edge with strong radiations outwards. After 30 days of incubation, colonies smooth, flat, entire edge margin, brown, hyphae septate, branched, smooth.