Botryosphaeriales » Botryosphaeriaceae » Neodeightonia

Neodeightonia rattanicola

Neodeightonia rattanicola

Konta & K.D. Hyde (2016)

 

Classification:Ascomycota-Pezizomycotina-Dothideomycetes-Dothideomycetes incertae sedis-Botryosphaeriales-Botryosphaeriaceae-Neodeightonia

 

Host species: Calamus sp. (Konta et al. 2016), Wodyetia bifurcata (Xiong et al. 2025)

 

Holotype: MFLU 15-0294 (Konta et al. 2016)

 

Known distribution: Phang-Nga, Thailand

 

IF Number: IF552169      Mycobank Number: 552169     FOF Number: FoF02238

 

Description

Saprobic on rachis of Calamus sp., Sexual morph: Ascomata 180–215 high × 146–168 μm diam. (x̅ = 197 × 155 μm, n = 10), immersed to semi-immersed, solitary, scattered, uniloculate, subglobose to irregular, dark brown or black, with a long neck, irregular at the base. Ostiole central non-papillate. Peridium 35–51 μm diam. (x̅ = 45 μm, n = 10), comprising several layers, outer layer thick, comprising dark brown to black-walled cells of textura angularis, inner layer thin, comprising hyaline cells of textura angularis. Hamathecium comprising hypha-like, hyaline, septate, cellular pseudoparaphyses, up to 3.27 µm wide, often constricted at the septa. Asci 91–108 × 19–25 μm (x̅ = 101 × 22 μm, n = 10), 8-spored, bitunicate, fissitunicate, cylindrical-clavate, with thick endotunica, long pedicellate, apically thickened, with a distinct, ocular chamber. Ascospores 22–26 × 8–11 μm (x̅ = 23× 10 μm, n = 20), overlapping biseriate or obliquely 2–3-seriate, hyaline, ellipsoidal-fusiform, aseptate, with polar apiculi, smooth-walled, surrounded by thin mucilaginous sheath. Asexual morph: Coelomycetous. Conidiomata stromatic 420–510 high × 357–443 μm diam. (x̅ = 446 × 381 μm, n = 5), pycnidial, superficial, dark brown to black, covered with dense mycelium, on PDA mostly uniloculate, individual or aggregated. Paraphyses cylindrical, aseptate hyaline. Conidiogenous cell 4.4−12.5 × 1.5−4.3 μm (x̅ = 9.4 × 3.4 μm, n = 10), holoblastic, cylindrical to subcylindrical, hyaline. Conidia 13–20 × 7–8 μm (x̅ = 17.3 × 8 μm, n = 20), initially hyaline, pale to dark brown when mature.

 

Culture conditions: Ascospores germinating on MEA within 24 hours and germ tube produced from cell. Colonies on MEA fast growing, after 2 weeks reaching 8–9 cm diam. at 25°C, white at the edge, grey in the middle and outwardly strongly radiating. After 1 month of incubation, the colonies on MEA, grey-olivaceous and spongy, hyphae, septate, branched and smooth, form asexual morph after 6 weeks.

 

 

Neodeightonia rattanicola (MFLU 15-0294, holotype) (A) Ascomata on host substrate. (B–D) Close-up of ascomata. (E) Section of ascoma. (F) Peridium. (G) Neck. (H) Pseudoparaphyses. (I–L) Asci. (M–Q) Ascospores. (R) Surface view of culture on MEA after 1 month. Scale bars: A = 1,000 μm, B = 500 μm, C–D = 200 μm, E = 50 μm, F, H = 10 μm, G = 20 μm, I–L = 20 μm, M–Q = 10 μm.

 

Neodeightonia rattanicola (MFLUCC 15-0319, holotype) (A) Section of conidioma. (B) Peridium. (C–L) Conidiogenous cells with conidia. (M−P) Immature conidia. (Q–S) Mature conidia. Scale bars: A–B = 50 μm, C–L = 10 μm, M–S = 5 μm.

 

Reference

Konta, S., Hongsanan, S., Phillips, A. J., Jones, E. B. G., Boonmee, S., & Hyde, K. D. (2016). Botryosphaeriaceae from palms in Thailand II-two new species of Neodeightonia, N. rattanica and N. rattanicola from Calamus (rattan palm). Mycosphere, 7(7), 950-961.

Xiong YR, Manawasinghe IS, Ausana Mapook 2025 – Addition to Tropical palm fungi: Ten new Records from China and Thailand. Asian Journal of Mycology

 

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