Chaetosphaeriales » Linocarpaceae » Neolinocarpon

Neolinocarpon arengae

Neolinocarpon arengae

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

 

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

 

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

 

Holotype: MFLU 15–0298 (Konta et al. 2017)

 

Known distribution: Phang-Nga, Thailand

 

IF Number: IF553963     Mycobank Number: 553963      FOF Number: FoF03847

 

Description

Saprobic on dead leaflet of Arenga pinnata (Wurmb) Merr. Sexual morph: Ascomata 336–566 μm high × 230–490 μm diameter (x̅  = 430 × 368 μm, n = 10), solitary, deeply immersed, with a central raised black, papilla, with a central ostiole. Papilla 129–218 μm high × 174–296 μm diameter at the base (x̅  = 154 × 203 μm, n = 5), black, shiny, with hyaline periphyses. Peridium 33–80 μm diameter (x̅  = 50 μm, n = 10), outer cells merging with the host epidermal cells, composed of dark brown to black cells of textura angularis. Hamathecium comprising numerous, 2–4 µm diameter (x̅  = 3 μm, n = 10), hypha-like, septate, unbranched paraphyses, longer than asci. Asci 168–214 × 15–21 μm (x̅  = 186 × 18 μm, n = 20), 8-spored, unitunicate, cylindrical, long-pedicellate, with a J-, wedge-shaped, subapical ring. Ascospores 114–134 × 3–4 μm (x̅  = 121 × 4 μm, n = 20), parallel when immature, becoming spiral at maturity, filiform, straight or curved, hyaline, aseptate, containing numerous refringent septum-like bands, ends rounded, with polar mucilaginous appendage at apex, smooth-walled. Asexual morph: Undetermined.

 

Culture conditions: Ascospores germinating on MEA within 2 days. Colonies on MEA reaching 6–8 cm diameter after 2 months at 25 °C, white to gray at the edge, gray to brown in the middle forward until nearly margin, light brown at margin, dark brown when mycelium growing into media 30 days of incubation, colonies smooth, flat, lobate margin, hyphae septate, branched, smooth.

 

 

Neolinocarpon arengae (MFLU 15–0298, holotype). (A) Appearance of ascomata on host substrate. (B, C) Close up of ascomata. (D) Yellowish ascospore mass. (E) Section of ascoma. (F) Papilla. (G) Paraphyses. (H–N) Asci. (O) J- reaction of apical ring. (P–Q) Appendages. (R–X) Ascospores. Scale bars: B = 500 μm, C = 200 μm, D = 50 μm, E = 200 μm, G = 10 μm, H–N, R–X = 50 μm, O = 20 μm, and P–Q = 5 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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