Xylariales » Diatrypaceae » Allodiatrype

Allodiatrype elaeidis

Allodiatrype elaeidis

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

 

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

 

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

 

Holotype: MFLU 15-1439 (Konta et al. 2020)

 

Known distribution: Krabi, Thailand

 

IF Number: IF556931     Mycobank Number: 556931    FOF Number: FoF05119

 

Description

Saprobic on petiole of Elaeis guineensis (Arecaceae). Sexual morph – Stromata 470–860 μm long, 440–710 μm diam. (x̄ = 630 × 550 μm, n = 10), with well-developed interior, solitary to gregarious, erumpent, black, with black stromatic zone on host surface, glabrous, irregular in shape, pustulate, bi- to multi-ascomata, with umbilicate ostioles appearing on the surface of the stroma. Ostiole opening through host bark and appearing as black spots, surrounded with a ring-like structure, composed of an outer layer of dark brown, small, tightly packed, thin parenchymatous cells and an inner layer of white to light-yellow, large, loosely packed, parenchymatous cells. Ascomata (excluding necks) 250–350 μm high, 230–300 μm diam. (x̄ = 330 × 280 μm, n = 10), perithecial, immersed in the stroma, globose to subglobose, glabrous, ostioles individual, with a short neck. Ostiolar canal 100–130 μm high, 95–115 μm diam. (x̄ = 120 × 110 μm, n = 10), cylindrical, sulcate, with periphyses. Peridium 20–40 μm wide (x̄ = 30 μm, n = 50), composed of two section layers, outer part; brown to dark brown, thick-walled cells, arranged in textura angularis, inner layer; hyaline, thick-walled cells of textura angularis. Hamathecium composed of 2–7 μm wide (x̄ = 4 μm, n = 60), filiform, longer than asci, septate, branch, hyaline, paraphyses. Asci (excluding stalks), spore-bearing part (17–)20–30(−39) × 9–11(−14) μm (x̄ = 25 × 11 μm, n = 60), apically rounded, with J- apical ring, apex-bearing part (1.5–)2–3(−5) μm long (x̄ = 3 μm, n = 60), 8-spores, unitunicate, clavate, with moderately long stalks, stalk-bearing part (28–)36–65(–94) μm long (x̄ = 50 μm, n = 60). Ascospores (6–)8–10(−11) × 1.5–3) μm (x̄ = 9 × 2 μm, n = 120), overlapping, yellowish to pale-brown, ellipsoidal to cylindrical or elongate-allantoid, aseptate, smooth-walled. Asexual morph – Undetermined.

 

Culture conditions: Ascospores germinated on MEA within 24 hours and germ tube was produced from end cell. Colonies on MEA, white at beginning, thinner towards edge, margin diffuse, reverse coloration pale yellow.

 

 

Allodiatrype elaeidis (MFLU 15-1439, holotype) (A) Stromata on host substrate. (B) Close up of stromata (ostiole opening surrounded with a ring-like structure). (C, D) Section of stromata. (E) Ostiolar canal. (F) Peridium. (G, H) Asci. (I–M) Ascospores. (N) Colony on MEA. Bars: A, B = 500 μm, C = 200 μm, D, G, H = 50 μm, E, F = 20 μm, I–M = 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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