Neolinocarpon rachidis

Neolinocarpon rachidis

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

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

Host species: Arenga pinnata (Konta et al. 2017)

Holotype: MFLU 15–0307 (Konta et al. 2017)

Known distribution: Phang-Nga, Thailand

IF Number: IF553962     Mycobank Number: 553962       FOF Number: FoF03846

Description

Saprobic on rachis of Arenga pinnata (Wurmb) Merr. Sexual morph: Ascomata 508–590 μm high × 320–390 μm diameter (x̅  = 557 × 346 μm, n = 10), solitary, deeply immersed, with a central raised, black, globose-subglobose papilla, with a central ostiole. Papilla 157–223 μm high × 127–198 μm diameter at the base (x̅  = 188 × 157 μm, n = 5), black, shiny, with hyaline periphyses. Peridium 34–80 μm wide (x̅  = 55 μm, n = 10), outer cells merging with the host epidermal cells, composed of dark brown to black cells of textura angularis. Hamathecium comprising numerous, 2.5–4 µm diameter (x̅  = 3 μm, n = 10), hypha-like, septate, unbranched, paraphyses, longer than asci. Asci 157–205 × 9–19 μm (x̅  = 180 × 14 μm, n = 20), 8-spored, unitunicate, cylindrical, long-pedicellate, with a wedge-shaped, J-, subapical ring. Ascospores 123–140 × 2–4 μm (x̅  = 133 × 3 μm, n = 20), parallel in ascus, becoming spiral when mature, filiform, straight or curved, hyaline, aseptate, containing numerous refringent septum-like bands, rounded at the apex with appendage, pointed at the base, smooth-walled. Asexual morph: Undetermined.

Culture conditions: Ascospores germinating on MEA within 7 days. Colonies on MEA reaching 3–4 cm diameter after two months at 25°C, white at the edge, brown in the middle with strong radiations outwards. After 30 days of incubation, colonies smooth, flat, margin undulate, white to gray in the center, gray-brown at the margin, mycelium becoming dark brown when growing into media, hyphae septate, branched, smooth-walled.