Linocarpon arengae
Konta, Boonmee & K.D. Hyde (2017)
Classification:Ascomycota-Pezizomycotina-Sordariomycetes-Sordariomycetidae-Chaetosphaeriales-Linocarpaceae-Linocarpon
Host species: Arenga pinnata (Konta et al. 2017)
Holotype: MFLU 15–0306 (Konta et al. 2017)
Known distribution: Phang-Nga, Thailand
IF Number: IF553960 Mycobank Number: 553960 FOF Number: FoF03844
Description
Saprobic on rachis of Arenga pinnata (Wurmb) Merr. Sexual morph: Ascomata 125–355 μm high × 878–1,368 μm diameter (x̅ = 205 × 1,094 μm, n = 10), solitary or aggregated, superficial, comprising black, dome-shaped, raised, blistering areas, subglobose, flattened at the base, with a central ostiole. Peridium 64–90 μm diameter (x̅ = 76 μm, n = 10), outer cells merging with the host epidermal cells, composed of dark brown to black cells of textura angularis. Hamathecium comprising numerous, 2–3.5 µm diameter (x̅ = 3 μm, n = 10), hyaline, hypha-like, septate paraphyses, longer than asci. Asci 132–177 × 9–15 μm (x̅ = 153 × 11 μm, n = 20), 8-spored, unitunicate, cylindrical, long-pedicellate, with a J-, wedge-shaped, subapical ring. Ascospores 91–102 × 2–4 μm (x̅ = 102 × 3 μm, n = 20), parallel when immature, becoming spiral when mature, filiform, straight or curved, hyaline, aseptate, containing numerous refringent septum-like bands, ends rounded, with polar mucilaginous appendage at the apex, smooth-walled. Asexual morph: Undetermined.
Culture conditions: Ascospores germinating on MEA within 3 days. Colonies on MEA reaching 6.5–7 cm diameter after 2 months at 25 °C, white at the edge, brown in the middle with strong radiations outwards. After 30 days of incubation, colonies smooth, hyphae septate, branched, smooth.