Xylariales » Diatrypaceae » Diatrypella

Diatrypella elaeidis

Diatrypella elaeidis

Konta, Boonmee & K.D. Hyde (2020)

 

Classification:Ascomycota-Pezizomycotina-Sordariomycetes-Xylariomycetidae-Xylariales-Diatrypaceae-Diatrypella

 

Host species: Elaeis guineensis (Konta et al. 2020)

 

Holotype: MFLU 15-0025 (Konta et al. 2020)

 

Known distribution: Guangdong, Thailand

 

IF Number: IF556572   Mycobank Number: 556572       FOF Number: FoF05122

 

Description

Saprobic on petiole of Elaeis guineensis (Arecaceae). Sexual morph: Stromata 1025–3965 μm long, 285–860 μm wide (x̄ = 1950 × 620 μm, n = 35), with well-developed interior, solitary to gregarious, erumpent, black, glabrous, fusiform or lenticular in shape, pustulate, 1–2-ascomata. Ascomata 242–600 μm high, 240–424 μm diam. (x̄ = 350 × 335 μm, n = 25), perithecial, immersed in the stroma, globose to subglobose, ostioles individual, with a short neck. Ostiolar canal 100–200 μm high, 70–190 μm diam. (x̄ = 140 × 120 μm, n = 20), cylindrical, sulcate, with periphyses. Peridium 22–55 μm wide (x̄ = 33 μm, n = 45), composed of two layers, outer part of brown, thick-walled cells, arranged in textura angularis, inner layers of hyaline, thick-walled cells of textura angularis. Hamathecium composed of 2–8 μm wide (x̄ = 4 μm, n = 70), filiform, longer than asci, septate, hyaline paraphyses. Asci (excluding stalks), spore-bearing part (29–)40–70(−98) × (7–)11–15(−17) μm (x̄ = 60 × 12 μm, n = 70), apically rounded, with J-apical ring, apex-bearing part (0.5–)1–3(−5) μm long (x̄ = 2 μm, n = 35), polysporous, unitunicate, cylindrical, with moderately short stalks, stalk-bearing part (18–)25–40(–57) μm long (x̄ = 33 μm, n = 20). Ascospores (3.5–)5–7(−10) × 1.5−3 μm (x̄ = 6 × 2 μm, n = 130), overlapping, yellowish to brown, ellipsoidal to cylindrical or elongate-allantoid, aseptate, smooth-walled. Asexual morph: Undetermined.

 

Culture conditions: Ascospores germinated on MEA within 24 hours. Colonies on MEA smooth, white, dense towards the edge, margin diffuse.

 

 

Diatrypella elaeidis (MFLU 15-0025, holotype) (A) Stromata on host substrate. (B) Close up of stromata. (C, D) Sections of stromata. (E, F) Ostiolar canal. (G) Peridium. (H–L) Asci. (M–Q) Ascospores. (R) Colony on MEA. Scale bars: A, B = 1000 μm, C = 500 μm, D = 200 μm, E, F, H–L = 50 μm, G = 20 μm, M–Q = 5 μm.

 

Reference

Konta, S., Maharachchikumbura, S. S. N., Senanayake, I. C., McKenzie, E. H. C., Jeewon, R., Stadler, M., ... & Eungwanichayapant, P. D. (2020). A new genus Allodiatrype, five new species and a new host record of diatrypaceous fungi from palms (Arecaceae). Mycosphere, 11(1), 239-268.

 

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